First Author:Hang Geng

Correspondence Author:  Junli Xu

Co author:Zhaoshun Liu , Hongbin Sun, Zhongning Shi

Journal:Materials Today Chemistry

Volume:34

Impact Factor:6.7

DOI number:10.1016/j.mtchem.2023.101798

Affiliation of Author(s):Department of Chemistry, Tsinghua University

Teaching and Research Group:物理化学

Place of Publication:ENGLAND

Abstract:Defect engineering has been regarded as an effective strategy to enhance the electrochemical capacitance of supercapacitors. In this work, we report an effective strategy to promote the formation of defects along with the surface reconstruction of NiFeCo-layered double hydroxide (LDH) by W doping and a successive in-situ electrochemical activation process. Our results reveal that the surface of NiFeCoW-LDH is reconstructed at high potential, which promotes the generation of vacancy and dislocation in NiFeCoW-LDH. The electrochemical activated NiFeCoW-LDH exhibits a capacitance as high as 12.35 F cm−2 at the current density of 5 mA cm−2 in 1 mol L−1 KOH. The defects and the surface nanoneedles structure synergistically contribute to the enhanced electrochemical performance. This work proposes a promising strategy for the design of rich defective electrodes along with surface reconstruction.

Document Code:WOS:001111371600001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:101798

ISSN No.:2468-5194

Translation or Not:no