ZIF-67 derived hollow Ni-Co-Se nano-polyhedrons for flexible hybrid supercapacitors with remarkable electrochemical performances  

作　　者：Guangmeng Qu Xixi Zhang Guotao Xiang Yunrui Wei Jiangmei Yin Zonghua Wang Xiaoli Zhang Xijin Xu 

机构地区：[1]School of Physics and Technology,University of Jinan,Ji'Nan 250022,China [2]State Centre for Inrernational Cooperation on Designer Low-Carbon&Environmental Materials,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Chemical Letters》2020年第7期2007-2012,共6页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China (No.51672109);Natural Science Foundation of Shandong Province for Excellent Young Scholars (No.ZR2016JL015)。

摘　　要：Nano-polyhedral NiSe2/CoSe2(Ni-Co-Se) with hollow architectures are synthesized by selenizing the precursors of Ni-Co bimetallic hydroxides that are directly derived from ZIF-67.The as-fabricated Ni-Co-Se electrodes exhibit high specific capacitance of 1668 F/g at 1 A/g accompanying with outstanding rate capability(about 82.8% retention of the initial capacity at 20 A/g).The corresponding Ni-Co-Se//AC all-solid-state hybrid supercapacitors are assembled by directly using the Ni-Co-Se on carbon fabric as the positive electrode,which deliver high energy density and power density(38.5 Wh/kg at 802.1 W/kg,32.0 Wh/kg at 8008.8 W/kg),excellent cyclic stability(82.3% retention after 5000 cycle) and robust mechanical flexibility(no obvious attenuation at bending to different angles).This work will provide a new and smart route for constructing transition metal selenides for supercapacitor devices.

关 键 词：Ni-Co-Se Nano-polyhedrons Hybrid supercapacitors 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]