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In recent years, cobalt has become a critical constraint on the supply chain of the Li‐ion battery industry. With the ever‐increasing projections for electric vehicles, the dependency of current Li‐ion batteries on the ever‐fluctuating cobalt prices poses serious environmental and sustainability issues. To address these challenges, a new class of cobalt‐free materials with general formula of LiNix...
A unique design of a nickel nanocone‐arrays supported silicon anode is introduced for high‐power and long‐life lithium‐ion batteries. The nanostructured Si anodes show a high reversible capacity of around 2400 mAh g−1 (at 0.2C) and excellent cycling capability. They also exhibit an impressive high‐rate capability and stable capacities of up to 1700 mAh g−1 at 1C and 1300 mAh g−1 at 2C.
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