Cu2Se@C thin film with three-dimensional braided structure as a cathode material for enhanced Cu2+storage

扫码查看

原文链接

万方数据

外文摘要：In the face of multiple challenges brought by the changes of global climate and environment,developing clean energy and updating green energy storage equipment are important ways to achieve carbon peak and carbon neutrality.Aqueous batteries have become a research hotspot due to their advantages of using the multivalent charge carrier,high ionic conductivity,environmental friendliness and cost effectiveness.In this work,the Cu2Se@C(Cu2Se coated on carbon clothes)thin film with a three-dimensional braided structure is fabricated by a simple electrochemical deposition method for Cu2+storage for the first time.Compared with the commercial Cu2Se powder,the well-designed Cu2Se@C film shows enhanced specific capacity(640 mAh/g at 0.5 A/g)and rate performance(542 mAh/g at 5 A/g)as well as superior cy-cling stability(82.7％capacity retention after 1000 cycles at 1 A/g).The Cu2+storage mechanism of the Cu2Se@C electrode is based on a reversible phase transition process of Cu2Se↔Cu2-xSe↔CuSe ↔ CuSe2.In kinetic characteristic analysis,the Cu2Se@C electrode demonstrates faster Cu2+diffusion in discharge process than charge process resulting from the phase transition and the variation of interplanar spacing.This work highlights a facile one-piece design strategy and opens a new gateway for the exploration of advanced aqueous energy storage systems.

外文关键词：

Cu2Se@CCu2+storageConversion mechanismKinetic characteristicFlexible energy storage

作者：

Wenhao Chen、Muxuan Wu、Han Chen、Lue Mo、Yirong Zhu

展开 >

作者单位：

College of Materials and Advanced Manufacturing,Hunan University of Technology,Zhuzhou 412007,China

Hunan Key of Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha 410022,China

基金：

国家自然科学基金Distinguished Young Scientists of Hunan Province湖南省自然科学基金Key Projects of Hunan Provincial Education Department

项目编号：

519721082022JJ100242021JJ3021622A0412

出版年：

2024

DOI：

10.1016/j.cclet.2023.108698

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(5)

参考文献量48