Suppressing the metal-metal interaction by CoZn_(0.5)V_(1.5)O_(4)derived from two-dimensional metal-organic frameworks for supercapacitors

作     者：Fang Yuan Guohua Gao Xiaodi Jiang Wenchao Bi Yixuan Su Jingwen Guo Zhihao Bao Jun Shen Guangming Wu 袁方;高国华;姜小迪;毕文超;苏怡璇;郭靖雯;包志豪;沈军;吴广明

作者机构：Shanghai Key Laboratory of Special Artificial Microstructure Materials and TechnologySchool of Physics Science and EngineeringTongji UniversityShanghai 200092China College of ScienceUniversity of Shanghai for Science and TechnologyShanghai 200093China 

基　　金：supported by the National Natural Science Foundation of China(51872204,52072261 and 22011540379) the National Key Research and Development Program of China(2017YFA0204600) Shanghai Social Development Science and Technology Project(20dz1201800) Shanghai Sailing Program(21YF1430900) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2022年第65卷第1期

页      码：105-114页

摘      要：Co_(2)VO_(4) with Co tetrahedrons and octahedrons of transition metal oxides has achieved progress in electrocatalysts and ***,high metal-metal interactions make it challenging to maintain high reactivity as well as increase the conductivity and stability of *** this work,spinel-structured CoZn_(0.5)V_(1.5)O_(4) with a high specific surface area was synthesized through an ion-exchange process from the metal-organic frameworks of *** functional theory calculations indicate that the replacement of transition metal by Zn can decrease the interaction between the transition metals,leading to a downshift in the π^(∗)-orbitals(V-O)and half-filled a_(1g) orbitals near the Fermi level,thus increasing the conductivity and stability of CoZn_(0.5)V_(1.5)O_(4).As a supercapacitor electrode,CoZn_(0.5)V_(1.5)O_(4) exhibits high cycling durability(99.4% capacitance retention after 18,000 cycles)and specific capacitance(1100mFcm^(-2) at 1mAcm^(-2)).This work provides the possibility of designing octahedral and tetrahedral sites in transition metal oxides to improve their electrochemical performance.

主 题 词：supercapacitors metal-metal interaction octahedral tetrahedral metal-organic frameworks 

学科分类：080801[080801] 0808[工学-自动化类] 08[工学] 

核心收录：

D　O　I：10.1007/s40843-021-1717-3

馆 藏 号：203104265...