SnO2 confining growth in layered graphene fibers toward superb volumetric lithium storage and flexibility

被引：6

作者：

Zhang, Yang ^{[1
]}

Weng, Wei ^{[1
]}

Li, Yuxing ^{[1
]}

Yang, Junjie ^{[1
]}

Liang, Yunxia ^{[1
]}

Yang, Lijun ^{[1
]}

Luo, Xiaogang ^{[1
]}

Zuo, Weiwei ^{[1
]}

Zhu, Meifang ^{[1
]}

机构：

[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, 2999 North Renmin Rd, Shanghai 201620, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2021年 / 555卷

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

NITROGEN-DOPED GRAPHENE; CATHODE MATERIAL; ANODE MATERIALS; OXIDE; PERFORMANCE; COMPOSITES; SUPERCAPACITOR; NANOCRYSTALS; ELECTRODES; MECHANISM;

D O I：

10.1016/j.apsusc.2021.149719

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：

For the burgeoning fiber-shaped batteries as a desirable wearable power supply, the priority is to construct fiber-shaped electrodes with high volumetric capacity because of the limited usable space on the human body. However, it still remains a big challenge. Herein, based on carbon-noncarbon strategy ultrafine SnO2 nanoparticles are uniformly accommodated in porous layered reduced graphene oxide (rGO) fibers, resulting in lamellar rGO-SnO2 hybrid fibers. The loading of SnO2 and the ratio of SnO2 to void are readily adjusted by the amount of ammonium hydroxide during the process of SnO2 formation. Upon an optimal technique, the rGO-SnO2 hybrid fiber presents largely enhanced mechanical strength and conductivity compared with rGO fiber, which are 3.8 times and 7.7 times the values of rGO fiber, respectively. Moreover, the hybrid fiber exhibits superb volumetric capacity of 1682 mAh cm-3 at 0.1 A g(-1), which surpasses the available fiber-shaped electrodes hitherto. Furthermore, by matching with LiFePO4/carbon fiber cathode, a fiber-shaped battery is achieved and is flexible, washable and knittable, providing a prospect in the next-generation wearable electronics.

引用

页数：8

共 49 条

[1] Carambola-shaped SnO2 wrapped in carbon nanotube network for high volumetric capacity and improved rate and cycle stability of lithium ion battery [J].