Tag: Lithium-ion Batteries

  • Room Temperature CO₂ Process Recycles Lithium-Ion Batteries

    Room Temperature CO₂ Process Recycles Lithium-Ion Batteries

    Key Takeaways

    1. The number of lithium-ion batteries is rapidly increasing, with 7.8 billion in use worldwide by 2016, raising environmental and health concerns due to inadequate recycling laws in developing nations.

    2. Researchers from the Chinese Academy of Sciences and Beijing Institute of Technology have developed a “three-in-one” method for recycling lithium-ion batteries that operates at room temperature without harsh chemicals.

    3. The innovative mechanochemical treatment uses high-energy ball milling to rearrange battery materials, facilitating the selective extraction of lithium and transition metals.

    4. The new recycling process employs water and pressurized carbon dioxide (CO2) to achieve over 95% lithium recovery while effectively capturing CO2, preventing greenhouse gas emissions.

    5. The method also repurposes leftover metals into high-performance catalysts for green hydrogen production, promoting a sustainable approach to battery waste management and renewable energy.

    Every year, the amount of lithium-ion batteries increases, reaching 7.8 billion worldwide in 2016 alone. However, many developing nations do not have adequate recycling laws in place. With billions of these batteries in use globally, the rising number of spent batteries poses significant dangers to both the environment and public health.

    Innovative Solutions

    Recently, scientists from the Chinese Academy of Sciences and Beijing Institute of Technology have introduced a groundbreaking “three-in-one” approach to address the escalating issue of discarded lithium-ion batteries. Their research, published in Nature Communications, outlines a method for reclaiming essential metals at room temperature without the need for energy-heavy furnaces or harsh chemicals that are usually necessary in recycling processes.

    Mechanochemical Treatment

    The focus of this innovation is on mechanochemical treatment, a type of high-energy ball milling that causes cationic disorder in the atomic structure of the battery. This mechanical force leads to micro-segregation, pushing lithium atoms to the surface while gathering transition metals like nickel and cobalt in the center. This rearrangement increases the reactivity of lithium, making it easier to extract selectively.

    Sustainable Metal Recovery

    To retrieve the metals, the researchers implemented a combination of water and pressurized carbon dioxide (CO2). The CO2 serves as the leaching agent, interacting with the lithium-rich surface to create high-purity lithium bicarbonate. This technique results in a lithium recovery rate of over 95% while successfully capturing CO2, thereby stopping the greenhouse gas from being released into the atmosphere.

    Upcycling Metal Waste

    Additionally, the method addresses the issue of secondary waste. Instead of throwing away leftover metal pieces, the process repurposes them into high-performance Oxygen Evolution Reaction (OER) catalysts for producing green hydrogen. In experiments, these catalysts showed a low overpotential of 322 mV and remained stable for more than 200 hours during operation.

    A Cleaner Future

    By functioning at normal temperature and pressure, this system removes the toxic liquid waste and high carbon emissions linked to traditional pyrometallurgy and hydrometallurgy. The researchers are confident that this closed-loop method — particularly suitable for high-nickel cathode systems — offers a sustainable, large-scale solution that connects battery waste management with renewable energy production.

    ScienceDirect and Nature via Tech Xplore.

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  • Fire-Safe Lithium-Ion Battery Design Prevents Thermal Runaway

    Fire-Safe Lithium-Ion Battery Design Prevents Thermal Runaway

    Key Takeaways

    1. Traditional lithium-ion batteries pose a fire hazard due to thermal runaway, which can occur when they are damaged or overcharged.
    2. Researchers from the Chinese University of Hong Kong developed a new battery design that significantly reduces the risk of fire and explosions.
    3. The new battery design only increased in temperature by around 3.5 °C when punctured, compared to a standard battery’s surge of 555.2 °C.
    4. The breakthrough was achieved by addressing ion association, which previously compromised battery safety by lowering the thermal runaway threshold.
    5. The innovative “solvent-relay strategy” in the new electrolyte enhances both safety and durability, allowing the battery to maintain 81.9% capacity after 1,000 cycles.

    Traditional lithium-ion batteries, which are used in many gadgets from automobiles to smartwatches, come with a notable fire hazard. These batteries can experience thermal runaway when they are damaged, overcharged, or defective. This phenomenon is risky because it causes internal parts to fail and emit intense heat. Typically, a battery can heat up by more than 500 °C, resulting in fire or explosions.

    New Research Findings

    Recently, researchers from the Chinese University of Hong Kong have created a new battery design that reduces this danger. Their findings were published in the journal Nature, where they explained their innovative design and the results of their tests. When a nail punctured the newly designed lithium-ion battery, the temperature only increased by around 3.5 °C and remained stable. On the other hand, a standard battery with conventional electrolytes experienced a temperature surge of 555.2 °C, leading to both an explosion and a fire.

    Understanding the Problem

    The breakthrough was achieved after the team pinpointed the problem — ion association. In traditional batteries, the way lithium ions and negative ions group within the electrolyte aids in forming a protective layer known as the solid electrolyte interphase (SEI), crucial for a long battery life. However, the researchers found that this same ion association reduces the temperature threshold for thermal runaway by nearly 94 °C, which compromises the safety of the battery.

    Innovative Solution

    To address this issue, the researchers developed what they refer to as a “solvent-relay strategy.” They created a new electrolyte that reacts differently at varying temperatures. Under normal room-temperature conditions, it encourages the ion association necessary for effective SEI formation. However, when temperatures rise due to damage, a specific solvent named lithium bis(fluorosulfonyl)imide takes over, bonding with the lithium and facilitating ion dissociation. This process prevents the formation of dangerous anion bonds that could lead to heat generation.

    Performance and Durability

    The new battery design has demonstrated both safety and resilience. Cells built using this innovative strategy exhibited remarkable cycle life, maintaining about 81.9% of their capacity even after 1,000 cycles.

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  • Tea as a Solution: New Hope for Recycling Used Batteries

    Tea as a Solution: New Hope for Recycling Used Batteries

    Key Takeaways

    1. The rise in old lithium-ion batteries is linked to the increasing use of electric cars, highlighting a need for effective recycling solutions.
    2. Traditional recycling methods for lithium iron phosphate cathodes are energy-intensive and yield raw materials rather than usable electrodes.
    3. Researchers are developing a direct battery regeneration technique using tea leaf polyphenols, which help restore iron ions and repair defects in battery structures.
    4. Regenerated cathodes maintain over 90% capacity after 400 charging cycles, allowing for potential reuse in electric vehicles and stationary storage.
    5. This innovative method could revolutionize battery recycling by enabling the refreshing of batteries instead of disposal, using eco-friendly and cost-effective materials.

    The amount of old lithium-ion batteries is on the rise, especially with the growing use of electric cars. Lithium iron phosphate cathodes (LiFePO₄) used to be thought of as hard to recycle since they have very few valuable metals. Traditional recycling methods like chemical breakdown or melting require a lot of energy and only produce raw materials, not usable electrodes.

    Innovative Research on Battery Regeneration

    A study published in Advanced Materials reveals that researchers from Hefei, Shenzhen, and Suzhou are working on a direct battery regeneration technique. They are using polyphenols from tea leaves as “electron donors” to help restore iron ions to a functional state and fix defects in the crystal structure. By adding aluminum and phosphate sources, this approach addresses damaged surfaces and builds new conductive layers that allow quick movement of ions and electrons, which is essential for daily use.

    Promising Results After Multiple Cycles

    After undergoing 400 charging cycles, the regenerated cathodes manage to keep over 90% of their initial capacity. This discovery means that batteries once thought to be ‘spent’ can actually be reused in electric vehicles or for stationary storage solutions. It’s especially impressive that a natural and low-cost additive like tea polyphenol, along with a focused repair method, allows for real reuse.

    Future Implications for Battery Recycling

    In the long run, this technique could support the large-scale application of battery regeneration and might even be applicable to other types of batteries. Rather than disposing of batteries when they reach the end of their life, they could be simply ‘refreshed’ in the future. The blend of natural materials and chemistry is not only environmentally friendly, but also economically viable and technologically advanced, potentially revolutionizing battery recycling as we know it.

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  • EV Fire Sinks Cargo Ship, Increasing Risks in EV Transport

    EV Fire Sinks Cargo Ship, Increasing Risks in EV Transport

    Key Takeaways

    1. The Morning Midas sank on June 23 after battling a fire that started on June 3 while transporting nearly 3,000 vehicles to Mexico.
    2. All 22 crew members were rescued by the U.S. Coast Guard as the fire worsened and the ship faced harsh weather conditions.
    3. The incident is reminiscent of previous cases, including the sinking of the Felicity Ace in March 2022 and the Fremantle Highway fire in July 2023, raising concerns about safety measures for vessels carrying electric vehicles (EVs).
    4. Lithium-ion batteries in EVs can cause dangerous fires if damaged, leading to “thermal runaway,” which is difficult to extinguish with standard equipment.
    5. The sinking of the Morning Midas serves as a warning about the unresolved safety issues related to transporting electric vehicles as the automotive industry shifts towards more EVs.

    The 600-foot (183-meter) vehicle carrier, Morning Midas, sank on Monday, June 23, in deep international waters near Alaska’s Aleutian Islands, as confirmed by its management company, Zodiac Maritime. The ship, which was transporting nearly 3,000 new vehicles to Mexico, faced a fire that started on June 3. All 22 crew members were successfully rescued by the U.S. Coast Guard and moved to a nearby merchant vessel as the fire worsened.

    Fire and Damage

    In a statement from Zodiac Maritime, it was reported that the ship ultimately lost the battle against the combined damage from the initial fire, harsh weather conditions, and later water seepage. Smoke was first detected rising from the deck, which was loaded with around 750 electric and hybrid vehicles.

    Similar Incidents

    This incident echoes the sinking of the Felicity Ace in March 2022, which went down off the Azores with 4,000 luxury vehicles following a fire, as well as the July 2023 fire on the Fremantle Highway in the North Sea. The latter case, involving nearly 500 EVs, led the Dutch Safety Board to urgently call for better emergency response measures for vessels carrying electric vehicles.

    The Lithium-Ion Issue

    The main problem stems from the lithium-ion batteries that power EVs. Although they are usually safe, if they become damaged or have defects, they can trigger a “thermal runaway” — a chemical reaction that generates extreme heat and releases flammable, toxic gases. Such fires are notoriously hard to put out using standard shipboard equipment and can rage on for days or even weeks without control.

    The U.S. Coast Guard is currently keeping an eye on the Morning Midas location, which is about 415 miles (667.88 km) from shore in waters more than 16,404 feet (5 km) deep. “There is no visible pollution,” stated Petty Officer Cameron Snell, who also noted that salvage and pollution-control vessels are present at the site as a precautionary measure.

    A Wake-Up Call

    As the global automotive industry speeds up its shift towards electric vehicles, the tragedy of the Morning Midas highlights the unresolved safety issues associated with transporting these vehicles across oceans worldwide.

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  • Graphene Boosts Lithium-Ion Battery Performance Despite Challenges

    Graphene Boosts Lithium-Ion Battery Performance Despite Challenges

    Key Takeaways

    1. Graphene has exceptional properties that could enhance lithium-ion battery performance by potentially replacing graphite in anodes.

    2. Research suggests that incorporating graphene could increase the energy density of batteries by over 30% and improve charging times.

    3. A stable and economical supply chain for graphene is necessary before widespread adoption in batteries can occur, as current production methods are costly.

    4. There is ongoing interest in graphene-based battery solutions, but technological breakthroughs are still needed for significant advancements.

    5. Various companies are exploring innovative production methods for graphene, aiming to balance high purity with cost-effective manufacturing for broader use in batteries.

    Lithium-ion batteries are presently the leading choice for storing electrochemical energy. Among various materials, graphene stands out due to its extraordinary electronic, mechanical, and chemical characteristics, which make it an exciting option for improving lithium-ion battery performance. These unique traits could allow graphene to take the place of graphite, a different form of carbon, in the anode of these batteries.

    Breakthroughs Still Needed

    Even with notable progress in technology, a significant advancement in graphene-based batteries has not yet occurred. There’s great potential for graphene to significantly boost the energy density of batteries; some research indicates that incorporating graphene into silicon-carbon mixtures could enhance energy density by over 30%. Additionally, graphene may offer quicker charging times and enhanced fast-charging capabilities for lithium-ion batteries.

    Supply Chain Challenges

    Nonetheless, there’s a continuous interest in graphene-based solutions in the battery sector, but Maximilian Stephan, a contributing author, points out the importance of establishing a stable and sufficient supply chain first. Currently, there is no economical manufacturing method available for graphene batteries, and the cost of graphene remains high. However, the authors of the review “Graphene Roadmap Briefs (No. 4): innovation prospects for Li-ion batteries” from the Fraunhofer Institute for Systems and Innovation Research (ISI) remain hopeful about graphene’s potential for commercial success in the battery industry.

    Innovative Production Methods

    Numerous businesses and startups are investigating creative methods to produce graphene using various strategies. For example, some companies focus on high-purity graphene to justify the higher costs associated with premium batteries, while others aim to create affordable production techniques on an industrial scale for this battery type. These developments in material science and manufacturing could eventually position graphene as a crucial element in battery technology.

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  • Next-Gen Tin Nanoparticle Battery for Faster Charging and Longevity

    Next-Gen Tin Nanoparticle Battery for Faster Charging and Longevity

    Key Takeaways

    1. New Composite Anode: Researchers developed an anode using tin nanoparticles in a carbon matrix instead of traditional graphite.

    2. Improved Charging and Lifespan: The new batteries charge quickly (in 20 minutes) and last over 1,500 charge cycles.

    3. Higher Energy Density: The innovative anode achieves 1.5 times the energy density of standard graphite anode batteries.

    4. Enhanced Structural Integrity: The tin nanoparticle anode reduces volume expansion, leading to better structural stability.

    5. Versatility in Battery Technology: This new approach shows promise for both lithium-ion and sodium-ion batteries, enhancing their performance.

    Batteries play a crucial role in the performance of various modern devices like laptops, smartphones, and electric vehicles, but they often present challenges. Key areas needing enhancement are charging speed and battery life. A team from Pohang University of Science and Technology alongside the Korea Institute of Energy Research has introduced a new composite anode that could address these problems.

    Innovative Material Use

    Rather than relying on graphite, the researchers from South Korea have opted for tin nanoparticles that are embedded in a robust carbon matrix for the anode material. These tin nanoparticles are created through a sol-gel method followed by a heating process known as chemical reduction. This method ensures that the tin nanoparticles are evenly spread throughout the durable hard carbon structure.

    Enhanced Battery Performance

    According to findings published in the journal ACS Nano, these advancements have led to better structural integrity and reduced volume expansion when compared to typical graphite anodes. Consequently, this innovation results in a greater energy density in the battery cells, along with improved electrochemical performance. In simpler terms, these new batteries charge more quickly and have a longer lifespan.

    When a lithium-ion battery utilizes an electrode composed of tin nanoparticles within hard carbon, it can endure over 1,500 charge cycles with rapid 20-minute charging times. Additionally, the energy density achieved is 1.5 times that of standard batteries featuring a graphite anode. This cutting-edge battery technology also demonstrates strong stability and enhanced kinetics in sodium-ion cells.

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  • Shenhuo New Materials Launches 8-Micron Battery Foil Production

    Shenhuo New Materials Launches 8-Micron Battery Foil Production

    Key Takeaways

    1. Shenhuo New Materials Technology has begun mass production of an 8-micron double-sided photovoltaic cell foil, the thinnest in China.
    2. The thin foil serves as a current collector in lithium-ion batteries, improving energy density and performance.
    3. This foil is designed for high-end batteries used in smartphones, 3C electronics, and robotic power systems, enhancing conductivity and charging stability.
    4. The company has significant production capabilities, with annual outputs of 140,000 tons of battery foil and plans to increase to 110,000 tons for battery foil billets.
    5. Shenhuo aims to develop even thinner aluminum foil options, enhancing China’s position in the aluminum foil manufacturing industry.

    Chinese company Shenhuo New Materials Technology has started mass production of a new 8-micron double-sided photovoltaic cell foil, marking a significant advancement in battery components. The firm claims it can produce around 100 tons each month, making it the thinnest battery foil being made in China today.

    Functionality of the New Foil

    This very thin foil acts as a current collector in lithium-ion batteries, which is crucial for collecting and distributing electrical current to various circuits. Mao Yunfeng, the deputy GM at Shenhuo New Materials, notes that by decreasing the thickness of the foil, the energy density and overall performance of batteries can be enhanced.

    Applications and Benefits

    The 8-micron foil is specifically created for premium batteries used in devices like smartphones, 3C electronics, and even robotic power systems. Its reduced thickness enhances conductivity and contributes to more stable charging.

    Production Capacity and Future Plans

    Shenhuo New Materials boasts substantial production capabilities for aluminum-based items, with an annual output of 140,000 tons of battery and double-zero foil, 180,000 tons of cast-rolled foil, and 150,000 tons of cold-rolled foil. They are also increasing their production of battery foil billets to accommodate 110,000 tons per year.

    The company aims to further innovate by developing even thinner aluminum foil options, with aspirations of propelling China to new heights in the aluminum foil manufacturing industry.

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  • New Iron-Based Cathode Could Cut EV Battery Costs by 40% in 5 Years

    New Iron-Based Cathode Could Cut EV Battery Costs by 40% in 5 Years

    The electric vehicle (EV) industry is experiencing significant growth, but a key challenge remains—cost. A significant portion of the expense arises from the batteries used in EVs, particularly lithium-ion batteries (LIBs), which account for about 50% of the overall vehicle price. These batteries are efficient and dependable, yet they are made from costly metals such as cobalt and nickel. Fortunately, a group of researchers led by Hailong Chen from Georgia Tech may have discovered a way to significantly reduce EV prices and lessen the environmental impact of battery manufacturing.

    New Cathode Material

    The team’s innovation focuses on a novel cathode material created from iron chloride (FeCl3), which is a far more affordable and sustainable option compared to conventional cathode materials. While traditional cathodes are expensive and depend on scarce resources, the researchers assert that FeCl3 costs only 1-2% of the price of these materials, all while providing comparable energy storage performance. Chen believes this advancement could drastically change both the EV market and large-scale energy storage solutions, significantly lowering costs.

    Impact on EV Pricing

    Utilizing FeCl3 could lead to a 30-40% reduction in the total cost of lithium-ion batteries. This reduction could help bridge the price gap between electric vehicles and internal combustion engine (ICE) vehicles, addressing one of the primary reasons consumers hesitate to switch to electric powertrains.

    Georgia Tech via ScienceDaily

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