Embedding nano-silicon in graphene nanosheets by plasma assisted milling for high capacity anode materials in lithium ion batteries

被引：115

作者：

Sun, Wei ^{[1
]}

Hu, Renzong ^{[1
]}

Liu, Hui ^{[1
]}

Zeng, Meiqin ^{[1
]}

Yang, Lichun ^{[1
]}

Wang, Haihui ^{[2
]}

Zhu, Min ^{[1
]}

机构：

[1] S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

[2] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2014年 / 268卷

基金：

中国国家自然科学基金;

关键词：

Lithium ion batteries; Silicon anode; Graphene nanosheets; Discharge plasma; Ball milling; BALL-MILLED GRAPHITE; DISCHARGE PLASMA; CARBON; STORAGE; PERFORMANCE; COMPOSITES; ELECTRODES; NANOCOMPOSITES; NANOWIRES; INSERTION;

D O I：

10.1016/j.jpowsour.2014.06.039

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The lithium storage performance of silicon (Si) is improved substantially by forming composite of nano-Si particles embedded homogeneously in graphene nanosheets (GNs) using a simple discharge plasma assisted milling (P-milling) method. The synergistic effect of the rapid heating of the plasma and the mechanical ball mill grinding with nano-Si as nanomiller converted the graphite powder to GNs with the integration of nano-Si particles in the in-situ formed GNs. This composite structure inhibits the agglomeration of nano-Si and improves electronic conductivity. The cycling stability and rate capability are enhanced, with a stable reversible capacity of 976 mAhg(-1) at 50 mAg(-1) for the P-milled 20 h nano-Si/GNs composite. A full cell containing a commercial LiMn2O4 cathode is assembled and demonstrated a satisfying utilization of the P-milled nano-Si/GNs composite anode with stable working potential. This composite shows promise for application in lithium ion batteries. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：610 / 618

页数：9

共 44 条

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