NiCoP/Co9S8 nanoflowers as advanced electrode material for asymmetric supercapacitors

被引：7
|
作者：
Fu, Qianqian [1 ]
Wang, Hui [1 ]
Cui, Mengqi [1 ]
Wang, Xuyun [1 ]
Ren, Jianwei [2 ]
Wang, Rongfang [1 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China
[2] Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd,Auckland Pk, ZA-2092 Johannesburg, South Africa
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 960卷
关键词：
Kirkendall effect; NiCoP; Co; 9; S; 8; nanoflowers; Electrode; Supercapacitors;
D O I：
10.1016/j.jallcom.2023.170798
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：
This work presents the synthesis of NiCoP using the Kirkendall effect and the preparation of a three-di-mensional (3D) nanoflower-like structure of NiCoP/Co9S8 through sulfur-induced dissociation. The opti-mized electrode sample exhibited a capacity of 1252 & mu;Ah cm-2 (31.3 mAh g-1) at 1 mA cm-2 and 898 & mu;Ah cm-2 (22.5 mAh g-1) at 30 mA cm-2. The assembled NiCoP/Co9S8 electrode/active carbon (AC)-based asymmetric supercapacitor (ASC) demonstrated a capacity retention rate of 87 % after 5000 cycles at 20 mA cm-2 current density. Furthermore, the optimized NiCoP/Co9S8 composite showed a power density of 480.1 W kg-1 at an energy density of 115.1 Wh kg-1 and a power density of 4800.1 Wh kg-1 at an energy density of 66.4 W kg-1. These findings highlight the potential of the 3D NiCoP/Co9S8 nanoflower-like structure for application in asymmetric supercapacitors. & COPY; 2023 Elsevier B.V. All rights reserved.
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页数：10
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