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There are still many types of negative electrode materials for lithium-ion battery alloys, including tin based alloys, silicon based alloys, aluminum based alloys, and many other types of alloys. However, alloy negative electrode materials have not yet formed large-scale production and are still in further research and development.
▼ Nanoscale negative electrode materials
Nanoscale negative electrode materials can add smaller other materials to traditional negative electrode materials, greatly improving the charging and discharging capacity and frequency of lithium-ion batteries.
Principles for selecting negative electrode materials
High energy ratio: The electrode potential relative to the lithium electrode is lower; Good reversibility: The reversibility of the charge discharge reaction is good; Good compatibility: Good compatibility with electrolytes and adhesives; Small specific surface area: preferably less than 10m2/g, high true density: greater than 2.0g/cm3; Good stability: Good dimensional and mechanical stability during the process of embedding lithium.
The distribution of resources on Earth needs to be abundant in order to further reduce the cost of companies producing lithium-ion batteries. If exposed to air, it can also ensure material stability, non-toxic side effects, and not pose a threat to users of lithium-ion batteries.
Factors determining the performance of negative electrode materials for lithium-ion batteries
★ Potential requirements
To ensure the high output potential of the two poles of the lithium ion battery, the insertion and oxidation Reduction potential potential of lithium ion should be as low as possible during the charging and discharging process of the anode material, and must be close to the conventional potential value of lithium metal materials.
★ Lithium storage space
To obtain a high capacity density lithium-ion battery, the lithium ions on the negative electrode material should be able to be inserted and quickly removed as much as possible, with more space for storing lithium ions.
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