材料科学
阳极
纳米线
石墨
电极
复合数
阴极
纳米技术
锂(药物)
硅
电化学
储能
化学工程
纳米线电池
石墨烯
制作
锂离子电池
碳纳米管
光电子学
纳米颗粒
复合材料
电气工程
物理
工程类
内分泌学
物理化学
功率(物理)
化学
医学
量子力学
作者
Saravanan Karuppiah,Caroline Keller,Praveen Kumar,Pierre-Henri Jouneau,Dmitry Aldakov,Jean-Baptiste Ducros,Gérard Lapertot,Pascale Chenevier,Cédric Haon
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-09-09
卷期号:14 (9): 12006-12015
被引量:34
标识
DOI:10.1021/acsnano.0c05198
摘要
Silicon (Si) is the most promising anode candidate for the next generation of lithium-ion batteries but difficult to cycle due to its poor electronic conductivity and large volume change during cycling. Nanostructured Si-based materials allow high loading and cycling stability but remain a challenge for process and engineering. We prepare a Si nanowires-grown-on-graphite one-pot composite (Gt-SiNW) via a simple and scalable route. The uniform distribution of SiNW and the graphite flakes alignment prevent electrode pulverization and accommodate volume expansion during cycling, resulting in very low electrode swelling. Our designed nanoarchitecture delivers outstanding electrochemical performance with a capacity retention of 87% after 250 cycles at 2C rate with an industrial electrode density of 1.6 g cm-3. Full cells with NMC-622 cathode display a capacity retention of 70% over 300 cycles. This work provides insights into the fruitful engineering of active composites at the nano- and microscales to design efficient Si-rich anodes.
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