Free‐standing BiOI@MWCNTs photoelectrodes for photo‐rechargeable zinc‐ion batteries  

作　　者：Bei Long Xiaojie Liang Yong Pei Xiongwei Wu Xianyou Wang Man-Kay Law 

机构地区：[1]State Key Laboratory of Analog and Mixed-Signal VLSI,University of Macao,Macao 999078,China [2]School of Chemistry,Xiangtan University,Xiangtan 411105,China [3]School of Chemistry and Materials Science,Hunan Agricultural University,Changsha 410128,China

出　　处：《Journal of Materials Science & Technology》2024年第31期137-142,共6页材料科学技术(英文版)

基　　金：supported by the Macao Young Scholars Program(AM2021011);the Macao Science and Technology Development Fund(0011/2019/APJ);the Research Committee of University of Macao(CPG2023-00005-IME);the Natural Science Foundation of China(52102312).

摘　　要：Photo-rechargeable batteries can implement solar energy harvesting and storage simultaneously and have attracted strong interest from researchers.The development of photoactive electrodes is the key to promoting the development of high-performance photocells.Herein,a free-standing BiOI@MWCNTs film is developed as photoelectrode to achieve the effective separation of photogenerated electron-hole pairs for high-efficiency solar-electric-chemical energy conversion.Light can charge up photocells with a photoconversion efficiency of∼1.3%,as well as accelerate charge transfer without requiring any external bias voltage.Ex situ XRD and XPS tests prove that the enhanced electrochemical reaction kinetics can improve the chemical-electric energy conversion efficiency under illumination.The capacity of the proposed photocell can be increased by 10.6%(from 195 mA h g^(-1)to 216 mA h g^(-1)at 0.2 A g^(-1))and 57.9%(from 76 mA h g^(-1)to 120 mA h g^(-1)at 5.0 A g^(-1))in light condition,while exhibiting a cyclic life of up to 600 cycles.This work can help to deepen the understanding of photo-rechargeable batteries.

关 键 词：Free-standing BiOI@MWCNTs film Photoactive electrode Photoaccelerated chemical-electric energy conversion Long cyclic life Photo-rechargeable zinc ion battery 

分 类 号：TM9[电气工程—电力电子与电力传动]