Annealing temperature dependent ZnCo2O4 nanosheet arrays supported on Ni foam for high-performance asymmetric supercapacitor

被引：40
作者：
Li, Xizi [1 ]
Zhang, Mingyi [1 ]
Wu, Lili [1 ,2 ]
Fu, Qishan [1 ]
Gao, Hong [1 ]
机构：
[1] Harbin Normal Univ, Key Lab Photon & Elect Bandgap Mat, Minist Educ, Sch Phys & Elect Engn, Harbin 150025, Heilongjiang, Peoples R China
[2] Heilongjiang Univ Sci & Technol, Ctr Engn Training & Basic Expt, Harbin 150022, Heilongjiang, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 773卷
基金：
中国国家自然科学基金;
关键词：
ZnCo2O4; Nanosheets; Annealing; Asymmetric supercapacitor; NICKEL FOAM; SUPERIOR PERFORMANCE; FACILE SYNTHESIS; NANOFLAKE ARRAY; NANOWIRE ARRAYS; ENERGY-STORAGE; CARBON CLOTH; THIN SHEETS; ELECTRODES; NANOPARTICLES;
D O I：
10.1016/j.jallcom.2018.09.197
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Porous network ZnCo2O4 nanosheets are successfully achieved by a simple hydrothermal process and adjusting the annealing temperature. The electrochemical performance of ZnCo2O4 nanosheets is significantly influenced by different annealing temperatures. It has been discovered that electrode of ZnCo2O4 that has be annealed at 200 degrees C shows an ultrahigh areal capacitance of 3.19 F cm(-2) at a current density of 2 mA cm(-2). An asymmetric supercapacitor device was assembled by ZnCo2O4 annealed at 200 degrees C as positive electrode and activated carbon as negative electrode, which exhibits the energy densities of 50.7 and 37.7 Wh kg(-1) at power densities of 187.6 and 2950.4 W kg(-1), respectively. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：367 / 375
页数：9
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