Flexible Carbon Nanotubes Confined Yolk-Shelled Silicon-Based Anode with Superior Conductivity for Lithium Storage

被引：22

作者：

Han, Na ^{[1
]}

Li, Jianjiang ^{[1
]}

Wang, Xuechen ^{[1
]}

Zhang, Chuanlong ^{[1
]}

Liu, Gang ^{[1
]}

Li, Xiaohua ^{[1
]}

Qu, Jing ^{[1
]}

Peng, Zhi ^{[1
]}

Zhu, Xiaoyi ^{[1
]}

Zhang, Lei ^{[2
,3
]}

机构：

[1] Qingdao Univ, Chem Expt Teaching Ctr, Sch Mat Sci & Engn, Sch Automat,Sch Environm Sci & Engn, 308 Ningxia Rd, Qingdao 266071, Peoples R China

[2] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[3] Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Peoples R China

来源：

NANOMATERIALS | 2021年 / 11卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

silicon; yolk− shell structure; anode; lithium-ion batteries;

D O I：

10.3390/nano11030699

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The further deployment of silicon-based anode materials is hindered by their poor rate and cycling abilities due to the inferior electrical conductivity and large volumetric changes. Herein, we report a silicon/carbon nanotube (Si/CNT) composite made of an externally grown flexible carbon nanotube (CNT) network to confine inner multiple Silicon (Si) nanoparticles (Si NPs). The in situ generated outer CNTs networks, not only accommodate the large volume changes of inside Si NPs but also to provide fast electronic/ionic diffusion pathways, resulting in a significantly improved cycling stability and rate performance. This Si/CNT composite demonstrated outstanding cycling performance, with 912.8 mAh g(-1) maintained after 100 cycles at 100 mA g(-1), and excellent rate ability of 650 mAh g(-1) at 1 A g(-1) after 1000 cycles. Furthermore, the facial and scalable preparation method created in this work will make this new Si-based anode material promising for practical application in the next generation Li-ion batteries.

引用

页码：1 / 11

页数：11

共 57 条

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