(a) Composite of Sn/Sn4P3 nanodomains embedded in amorphous P matrix. (b) Quantitative analysis by PDF. Credit: Haijun Yu, Beijing University of Technology
Sodium-ion batteries are an exciting alternative for post-lithium energy storage, while their anode materials of high performance are still limited. Phosphorus-based materials enable high-capacity anodes for sodium-ion batteries, but often face poor performance retentions owing to low conductivity and large volume expansion. To produce a cost-effective sodium-ion battery, researchers based at the Beijing University of Technology, have synthesized a series of P-/Sn-based composites that serves as high-capacity and high-stability anode materials, enabling a full battery that retains a capacity retention of 97.7% after 50 cycles.
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