Internally inflated core-buffer-shell structural Si/EG/C composites as high-performance anodes for lithium-ion batteries
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Abstract
本文采用球磨和喷雾干燥法, 制备了类西瓜型可控内膨胀核-缓冲-壳结构Si/电化学剥离石墨烯/C(Si/EG/C)复合材料. 在纳米硅和碳壳之间填充了含大量褶皱和空隙的EG, 不仅缓冲了Si/EG/C颗粒内部硅的体积变化, 还提供了锂离子的快速传输通道. 凭借这些优势, 核-缓冲-壳结构的Si/EG/C表现出优异的电化学性能. 半电池中Si/EG/C负极在100次循环后相对于初始容量没有下降(834 mA h g−1). 此外, Si/EG/C//LiCoO2全电池在500次循环后相对于初始放电容量的容量保持率接近100%. 这些结果表明Si/EG/C在下一代锂离子电池中具有潜在应用前景.
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OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies
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