A universal design for triggering the precise micro-structure reconstruction through in-situ electro-regulating to boost the pseudocapacitance of MnO_(2)  

作　　者：Lijin Yan Jiangyu Hao Baibai Liu Xuefeng Zou Qibin Wu Jin Hou Jizhou Duan Shicheng Wei Yang Zhou Bin Xiang Baorong Hou 

机构地区：[1]College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China [2]College of Optoelectronic Engineering,Chongqing University,Chongqing 400044,China [3]Guizhou Provincial Key Laboratory of Computational Nano-Material Science,Guizhou Normal University,Guiyang 550018,Guizhou,China [4]College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,Shandong,China [5]Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,Shandong,China [6]National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China [7]Analytical and Testing Center of Chongqing University,Chongqing University,Chongqing 401331,China

出　　处：《Journal of Energy Chemistry》2022年第11期184-197,I0006,共15页能源化学（英文版）

基　　金：supported by the Opening Project of State Key Laboratory of Advanced Chemical Power Sources;Guizhou Provincial Science and Technology Projects (QKHJC-ZK[2021]YB057);the Growth Project of Young Scientific and Technological Talents in Colleges and Universities of Guizhou Province (QKHJCKYZ[2021]252);the Reward and Subsidy Fund Project of Guizhou Education University (Z20210108);the Doctoral Program of Guizhou Education University (2019BS022)

摘　　要：Developing a precise controllable strategy for modulating the micro-morphology,atom coordination environment,and electronic structure of electrode materials is crucial for the performance in the field of energy storage,yet still a tremendous challenge.Herein,a facile and universal in-situ electrochemical self-optimization design,electro-regulating,is designed to controllably produce electrode materials with abundant defects.Through detailed characterization studies,the microstructure of MnO_(2) is reconstructed after electro-regulating,which exhibits a structure of small fragments with numerous holes due to the partial self-dissolution of acidic oxides under an alkaline operating environment.Furthermore,the electro-regulating strategy not only presents the formation steps of numerous holes but is also accompanies by a number of O vacancies generation process due to the activation of an external electric field.This study provides a new inspiration for reasonably designing advanced functional electrode materials for various electrochemical applications and beyond.

关 键 词：Electro-regulating Microstructure reconstructed MnO_(2) Corrosion resistance Supercapacitors 

分 类 号：TQ137.12[化学工程—无机化工] TM53[电气工程—电器]