Controllable Synthesis of Three-Dimensional β-NiS Nanostructured Assembly for Hybrid-Type Asymmetric Supercapacitors

Nanomaterials

Yao Zhang¹  Daqian Ding¹  Yanfang Gao¹  Jia Zhang¹ 

[1] Xincheng District, No. 49 Aimin Street, Inner Mongolia University of Technology, College of Chemical Engineering, Hohhot 010051, China;

关键词: nanostructured β-nis;    controllable synthesis;    hybrid-type asymmetric supercapacitors;   

DOI  :  10.3390/nano10030487

来源: DOAJ

【 摘 要 】

The process of energy storage in supercapacitors via the surface reaction of the electrode can lead to a significant perfecting of the electrochemical performance of supercapacitors, for developing the morphologies of materials and increasing the specific surface areas of the electrodes. Three-dimensional nickel sulfide (NiS) superstructures with nanomorphologies, viz. coral-like, urchin-like, flake-like, and flower-like, are synthesized through simple solvothermal methods, without any template. The nanostructured flower-like β-NiS demonstrates, not only a remarkable specific capacitance of 2425.89 F·g⁻¹ at the current densities of 1 A·g⁻¹, but also an excellent cycling stability of approximately 100% (at the current density of 10 A·g⁻¹ over 5000 cycles). Moreover, the hybrid-type asymmetric supercapacitor, constructed from the flower-like β-NiS positive electrode and active carbon negative electrode, exhibits an energy density of 42.12 Wh·kg⁻¹ at a power density of 28.8 kW·kg⁻¹.

【 授权许可】

Unknown