Mesoporous Co0.85Se nanosheets supported on Ni foam as a positive electrode material for asymmetric supercapacitor

被引：87

作者：

Gong, Chao ^{[1
,2
]}

Huang, Miaoliang ^{[1
,2
]}

Zhou, Pei ^{[1
,2
]}

Sun, Zhixian ^{[1
,2
]}

Fan, Leqing ^{[1
,2
]}

Lin, Jianming ^{[1
,2
]}

Wu, Jihuai ^{[1
,2
]}

机构：

[1] Minist Educ, Engn Res Ctr Environment Friendly Funct Mat, 668 Jimei Ave, Xiamen 361021, Fujian, Peoples R China

[2] Huaqiao Univ, Coll Mat Sci & Engn, Inst Mat Phys Chem, 668 Jimei Ave, Xiamen 361021, Fujian, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2016年 / 362卷

基金：

中国国家自然科学基金;

关键词：

Supercapacitor; Co0.85Se nanosheet; Hydrothermal method; HIGH-PERFORMANCE ELECTRODES; REDUCED GRAPHENE OXIDE; IN-SITU GROWTH; ACTIVATED CARBON; NICKEL FOAM; SELENIDE NANOSTRUCTURES; HIGH-ENERGY; COMPOSITE; NANOWIRES; POWER;

D O I：

10.1016/j.apsusc.2015.11.194

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：

Mesoporous Co0.85Se nanosheets on Ni foam for high-performance supercapacitors were prepared by a facile one-step hydrothermal method. The as-synthesized Co0.85Se electrodes possess high pseudocapacitive performance with large specific capacitance and excellent cycling stability. The specific capacitance can achieve a maximum of 1378F g(-1) at a current density of I A g(-1), which can still keep 95.5% of capacitance retention after 1000 cycles. Then, an asymmetric supercapacitor was fabricated by using Co0.85Se nanosheets as positive material and activated carbon (AC) as negative material. The asymmetric configuration can extend voltage window to 1.6 V, which lead to a significant increase in the energy density to 39.7 W h kg(-1) at a power density of 789.6 W kg(-1), couples with outstanding cycle stability. The results demonstrate that the mesoporous Co0.85Se nanosheets are promising electrode materials for supercapacitors. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：469 / 476

页数：8

共 49 条

[11] Potentiostatically deposited nanostructured α-Co(OH)2:: A high performance electrode material for redox-capacitors [J].