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

页码：1205 / 1209

页数：5

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