Metal-organic frameworks derived low-crystalline NiCo_(2)S_(4)/Co_(3)S_(4) nanocages with dual heterogeneous interfaces for high-performance supercapacitors  

作　　者：Zixin Jia Youning Wang Jiaqi Chen Zhijie Cao Shugang Pan Yan Zhou Jingwen Sun Junwu Zhu Xin Wang Yongsheng Fu 

机构地区：[1]Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education,Nanjing University of Science and Technology,Nanjing 210094,China [2]Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials,Huaiyin Normal University,Huaiyin 223300,China [3]Ningxia University,Yinchuan 750021,China [4]Changzhou Institute of Technology,Changzhou 213032,China

出　　处：《Chinese Chemical Letters》2023年第1期152-158,共7页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.52173255 and 52125202);the Opening Project of the Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials(No.JSKC20021);PAPD of Jiangsu and the Collaborative Innovation Center for Advanced Micro/nanomaterials and Equipment(Co-constructed by Jiangsu Province and Ministry of Education)。

摘　　要：Nickel cobalt bimetallic heterogeneous sulfides are attractive battery-type materials for electrochemical energy storage.However,the precise synthesis of electrode materials that integrate highly efficient ions/electrons diffusion with abundant charge transfer channels has always been challenging.Herein,an effective and concise controllable hydrothermal approach is reported for tuning the crystalline and integrated structures of MOF-derived bimetallic sulfides to accelerate the charge transfer kinetics,and thus enabling rich Faradaic redox reaction.The as-obtained low-crystalline heterogeneous NiCo_(2)S_(4)/Co_(3)S_(4)nanocages exhibit a high specific capacity(1023 C/g at 1 A/g),remarkable rate performance(560 C/g at 10A/g),and outstanding cycling stability(89.6%retention after 5000 cycles).Furthermore,hybrid supercapacitors fabricated with NiCo_(2)S_(4)/Co_(3)S_(4)and nitrogen-doped reduced graphene oxide display an outstanding energy density of 40.8 Wh/kg at a power density of 806.3 W/kg,with an excellent capacity retention of 88.3%after 10000 charge-discharge cycles.

关 键 词：Metal-organic frameworks Nickel cobalt heterogeneous sulfides Low-crystalline nanostructure High-performance supercapacitors High energy density 

分 类 号：TM53[电气工程—电器]