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Scalable submicron/micron silicon particles stabilized in a robust graphite-carbon architecture for enhanced lithium storage.

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Bibliographic Details
Title:	Scalable submicron/micron silicon particles stabilized in a robust graphite-carbon architecture for enhanced lithium storage.
Authors:	Mu, Tiansheng¹ (AUTHOR), Zhang, Zhiguo¹ (AUTHOR), Li, Qin¹ (AUTHOR), Lou, Shuaifeng¹ (AUTHOR), Zuo, Pengjian¹ (AUTHOR), Du, Chunyu¹ (AUTHOR), Yin, Geping¹ (AUTHOR) yingeping@hit.edu.cn
Source:	Journal of Colloid & Interface Science. Nov2019, Vol. 555, p783-790. 8p.
Subjects:	Architecture, Graphite, Silicon, Particles, Lithium-ion batteries, Nanosilicon
Abstract:	Silicon-carbon composite is recognized as one of the most promising next-generation anodes for high-energy lithium-ion batteries, especially silicon-graphite composites. Herein, cost-efficient and scalable submicron/micron silicon particles are stabilized in a robust graphite-carbon architecture by solid-phase ball milling and liquid-phase coating methods. The obtained silicon-graphite-carbon composite with a stable encapsulated sandwich-like architecture exhibits impressive lithium storage performance, including high initial Coulombic efficiency of 83.7%, outstanding cycle stability and remarkable rate capability. Even at high loadings of 4 mg cm−2, it still exhibits great reversible capacity with 620 mA h g−1 after 100 cycles at 0.2 C. Furthermore, 8 wt% silicon-graphite-carbon composites as additives are applied into the full cell with a designed capacity of 1000 mA h, and the full cell displays superior cycle stability with high capacity retention of 85% after 100 cycles. In addition, the scalable and low-cost preparation makes it enormous application value and huge commercial prospect. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Silicon-carbon composite is recognized as one of the most promising next-generation anodes for high-energy lithium-ion batteries, especially silicon-graphite composites. Herein, cost-efficient and scalable submicron/micron silicon particles are stabilized in a robust graphite-carbon architecture by solid-phase ball milling and liquid-phase coating methods. The obtained silicon-graphite-carbon composite with a stable encapsulated sandwich-like architecture exhibits impressive lithium storage performance, including high initial Coulombic efficiency of 83.7%, outstanding cycle stability and remarkable rate capability. Even at high loadings of 4 mg cm−2, it still exhibits great reversible capacity with 620 mA h g−1 after 100 cycles at 0.2 C. Furthermore, 8 wt% silicon-graphite-carbon composites as additives are applied into the full cell with a designed capacity of 1000 mA h, and the full cell displays superior cycle stability with high capacity retention of 85% after 100 cycles. In addition, the scalable and low-cost preparation makes it enormous application value and huge commercial prospect. [ABSTRACT FROM AUTHOR]
ISSN:	00219797
DOI:	10.1016/j.jcis.2019.07.110