Highly active SiO2@C nanofiber: high rate and long cycling for lithium ion batteries

被引：9

作者：

Chen, Zhi ^{[1
,2
]}

Xiang, Tong ^{[2
]}

Xiong, Qingming ^{[2
]}

Chen, Li ^{[2
]}

Yang, Huiyong ^{[2
]}

Feng, Zhijun ^{[2
]}

Li, Xibao ^{[2
]}

Shen, Xing ^{[1
]}

Huang, Juntong ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China

[2] Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Jiangxi, Peoples R China

来源：

IONICS | 2021年 / 27卷 / 04期

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

SiO2@C; Lithium ion battery; Diffusion coefficient; High rate; Nanofiber;

D O I：

10.1007/s11581-021-03935-z

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：

SiO2-based anodes for lithium ion batteries (LIBs) suffer from low conductivity and volume change in charge/discharge processes. It is reported that reasonable amorphous and nanometric characteristics can effectively improve the activity of SiO2 for Li+ storage. So, highly active SiO2@C nanofibers were prepared by electrospinning. Using X-ray diffraction (XRD), its amorphous characteristics were revealed. The results from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that it was a nanofiber structure. As an anode for LIBs, the SiO2@C nanofibrous electrode showed the discharge capacities of 675 and 188 mAh g(-1) at 1 A g(-1) (1000the cycle) and 10 A g(-1) (5000th cycle), respectively. Even at 50 A g(-1), it still maintained 88 mA h g(-1) at 60,000 cycles, showing excellent stability and high rate.

引用

页码：1385 / 1392

页数：8

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