Carbon nanotubes anchored SiOx composite anode for high cyclic stability lithium-ion batteries

被引:4
|
作者
Zhang, Junying [1 ]
Chen, Linlin [1 ]
Hou, Zhi-Ling [1 ]
Zhang, Xiaoming [2 ]
Li, Chuanbo [2 ,3 ]
机构
[1] Beijing Univ Chem Technol, Coll Math & Phys, Beijing 100029, Peoples R China
[2] Minzu Univ China, Sch Sci, Beijing 100081, Peoples R China
[3] Minzu Univ China, Optoelect Res Ctr, Beijing 100081, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium -ion battery; Silicon suboxide; Carbon nanotube; Anode material; High coulombic efficiency; METAL-ORGANIC FRAMEWORKS; PERFORMANCE; NANOCOMPOSITES; ELECTRODE;
D O I
10.1016/j.est.2024.111445
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Silicon suboxide (SiOx, 0 < x < 2) is one of the most promising anode materials because of its high lithium-ion storage capacity. However, the poor intrinsic conductivity and large volume change during cycling limits its practical application as lithium-ion battery anode materials. Herein, we propose a novel strategy to introduce carbon nanotubes (CNTs) on the SiOx particles, forming a conductive network and relieving the volume expansion effect, which possess improved reversible capacity and robust structure for long cycling stability. The SiOx/CNT composite anode delivers reversible capacity of 1533.8 mAh g(-1) at the first cycle and maintains 599.6 mAh g(-1) after 500 cycles with a high coulombic efficiency of 99.7 %. In this paper, SiOx composite anchored by CNTs was prepared, which is a simple and effective strategy to improve the conductivity of SiOx, relieve the volume effect and further promote its electrochemical performance benefit from the high conductivity and structural stability of CNTs. This research provides a significant reference for constructing the delicate structure of SiOx-based composites to enhance cyclic performance.
引用
收藏
页数:6
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