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Fiber supercapacitors with high energy density based on braiding structure.

Authors :
SHAO Guangwei
SU Chuanli
SHAO Huiqi
JIANG Jinhua
LIU Xiangyang
CHEN Nanlian
Source :
Journal of Donghua University (Natural Science Edition); Dec2022, Vol. 48 Issue 6, p14-20, 7p
Publication Year :
2022

Abstract

Coaxial structure fiber supercapacitor has received extensive attention due to its good integrity and excellent electrochemical performance. However, the complicated preparation process, precise technical requirements and low yield restricted its development. A coaxial structure fiber supercapacitor with an operating voltage of 1.6 V was prepared by braiding a core yarn of AC@CNT (AC is activated carbon and CNT is carbon nanotubes) negtive electrode and a braided yarn of NiCo<subscript>2</subscript>S<subscript>4</subscript>@CNT positive electrode. This braiding strategy is simple and efficient, and the fabricated fiber supercapacitor has a high energy density (energy density of 35.1 mW·h/cm³ at power density of 233.2 mW/cm³) and outstanding flexibility (no obvious change after bending 1 000 cycles in cyclic voltammetry curve). The braided fiber supercapacitors show excellent integrability. The output voltage of 2-unit tandem fiber supercapacitors reaches 3.2 V, which can light up the "DHU 70" pattern composed of 65 LEDs. This work provides a new strategy for the preparation of coaxial structure fiber supercapacitors. [ABSTRACT FROM AUTHOR]

Details

Language :
Chinese
ISSN :
16710444
Volume :
48
Issue :
6
Database :
Complementary Index
Journal :
Journal of Donghua University (Natural Science Edition)
Publication Type :
Academic Journal
Accession number :
160663091
Full Text :
https://doi.org/10.19886/j.cnki.dhdz.2021.0437