Hierarchical core-shell structured CoNi2S4/Ni3S2@Ni(OH)2 nanosheet arrays as electrode for electrochemical energy storage

被引：34

作者：

Chen, Fangshuai ^{[1
]}

Wang, Hui ^{[1
]}

Ji, Shan ^{[1
,2
]}

Pollet, Bruno G. ^{[3
]}

Wang, Rongfang ^{[1
]}

机构：

[1] Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China

[2] Jiaxing Univ, Coll Biol Chem Sci & Chem Engn, Jiaxing 314001, Peoples R China

[3] Norwegian Univ Sci & Technol NTNU, Fac Engn, Dept Energy & Proc Engn, NO-7491 Trondheim, Norway

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 785卷

基金：

中国国家自然科学基金;

关键词：

Core-shell structure; Binder-free electrode; Nanosheet; Energy storage; NICKEL-COBALT SULFIDE; BINDER-FREE ELECTRODE; PERFORMANCE; DESIGN; NANOSTRUCTURES; NI; CONFIGURATION; CAPACITANCE; TEXTILE; FOAM;

D O I：

10.1016/j.jallcom.2019.01.235

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：

Herein, hierarchical core-shell structured CoNi2S4/Ni3S2@Ni(OH)(2) nanosheet arrays are synthesized through a facile method. The electrochemical results show that combining CoNi2S4/Ni3S2 nanosheet arrays (as core) with Ni(OH)(2) nanosheets (as shell) is an effective way to improve electrochemical capacitive properties due to the synergetic effect between CoNi2S4/Ni3S2 and Ni(OH)(2). The as-prepared CoNi2S4/Ni3S2@Ni(OH)(2) exhibits a high capacity of about 772.2 mu Ah cm(-2) at a current density of 1 mA cm(-2) , with an excellent capacity at very high current densities e.g. 500 mu Ah cm(-2) at 30 mA cm(-2) and an outstanding durability (ca. 98% of the capacity retention after 4000 cycles). Moreover, the electrochemical capacitive property of CoNi2S4/Ni3S2@Ni(OH)(2) is also evaluated in an asymmetric two-electrode cell assembled by using CoNi2S4/Ni3S2@Ni(OH)(2) as the cathode and the active carbon (AC) as the anode. The asymmetric cell shows a high energy density of about 0.432 mWh cm(-2) when the power density was 1.646 mW cm(-2), making it a promising electrode material for practical energy storage applications. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：684 / 691

页数：8

共 33 条

[1] A facile drop-casting approach to nanostructured copper oxide-painted conductive woven textile as binder-free electrode for improved energy storage performance in redox-additive electrolyte [J].