Co9S8 quasi-hexagonal nanoparticles coupled with WS2 nanoring anchored on 3D sulfur, nitrogen Co-doped carbon nanotubes@graphene oxide cross-linking architecture for high performance asymmetric supercapacitor

被引:23
作者
Li, Yujin [1 ,2 ]
Liu, Lian [1 ,2 ]
Yu, Yadi [1 ,2 ]
Shang, Xueni [1 ,2 ]
Meng, Fanbin [1 ,2 ]
机构
[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin, Peoples R China
[2] Hebei Univ Technol, Hebei Key Lab Boron Nitride Micro & Nano Mat, Tianjin, Peoples R China
基金
中国国家自然科学基金;
关键词
Co9S8 quasi-Hexagonal nanoparticles; WS2; nanoring; Sulfur; Nitrogen Co-Doped carbon; nanotubes@graphene oxide; 3D cross-linking architecture; Asymmetric supercapacitor; HIERARCHICAL POROUS CARBON; NANOSHEETS; ELECTRODE;
D O I
10.1016/j.carbon.2021.12.093
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
Designing advanced hybrid supercapacitors (SCs) electrode materials with 3D cross-linking hierarchical porous architecture has desirable structural advantages, which can facilitate ion transport and provide excellent reaction site. Herein, a unique nanostructure consisting of Co9S8 quasi-hexagonal nanoparticles coupled with WS2 nanoring anchored on 3D sulfur, nitrogen Co-doped carbon nanotubes@graphene oxide (Co9S8@WS2-NS-15mlGO@CNTs) was obtained using a facile solvothermal strategy. This crosslinking and hierarchical porous nanostructure can maximize the electrical conductivity of entirety, which provides a favorable transport and permeability for the ions and electrons of the electrolyte environment. Benefiting from the structural compositional advantages and full play of the synergetic coupling effect, the as-prepared Co9S8@WS2-NS-15mlGO@CNTs electrode material exhibits absolutely the topmost specific capacitance of 1820.8 F g(-1) at a current density of 1 A g(-1) and outstanding cycle stability with a capacitance retention of 90.2% after 10000 cycles at 30 A g(-1). Moreover, an asymmetric supercapacitor (ASC) fabricated by Co9S8@WS2-NS-15mlGO@CNTs (positive electrode) and NS-15mlGO@CNTs (negative electrode) presents an ultra-high energy density of 95.3 Wh kg(-1) at a power density of 600 W kg(-1), and long cycle life with 86.7% specific capacity retention at a current density of 20 A g(-1) after 10000 cycles. It is believed that the presented work may open a new perspective to fabricate future competitive high-performance energy storage devices. (C) 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页码:503 / 518
页数:16
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