Nano/Micro-Structured Si/C Anodes with High Initial Coulombic Efficiency in Li-Ion Batteries

被引：38
|
作者：
Xu, Quan [1 ,2 ,3 ]
Li, Jin-Yi [1 ,2 ,3 ]
Yin, Ya-Xia [1 ,2 ]
Kong, Yi-Ming [1 ,2 ]
Guo, Yu-Guo [1 ,2 ,3 ]
Wan, Li-Jun [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
来源：
CHEMISTRY-AN ASIAN JOURNAL | 2016年 / 11卷 / 08期
基金：
中国国家自然科学基金;
关键词：
anodes; Coulombic efficiency; lithium-ion batteries; nano; micro-structures; Si; C; CORE-SHELL STRUCTURE; HIGH AREAL CAPACITY; C COMPOSITE; SILICON; ELECTRODE; STORAGE; FACILE; DESIGN;
D O I：
10.1002/asia.201600067
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
One of the major challenges for designing high-capacity anode materials is to combine both Coulombic efficiency and cycling stability. Herein, nano/micro-structured Si/C composites are designed and synthesized to address this challenge by decreasing the specific surface area and improving the tap density of Si/C materials. An ultrahigh initial Coulombic efficiency of 91.2% could be achieved due to a proper particle size, low specific surface area, and optimized structure. The nano/micro-structured Si/C anodes exhibit excellent cycling stability with 96.5% capacity retention after 100 cycles under a current density of 0.2Ag(-1).
引用
收藏
页码：1205 / 1209
页数：5
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