Impact Factor: 10.6

DOI number: 10.3866/pku.whxb202308053

Journal: 物理化学学报

Place of Publication: 中国

Abstract: In the wake of the carbon–neutral era, the exploration of innovative materials for energy storage and conversion has garnered increasing attention. While nickel silicates have been a focal point in energy storage research, their application in supercapacitors (SCs) has been relatively underreported due to poor conductivity. A newly designed architecture, designated as rGO@NiSiO@NiO/C (abbreviated for reduced graphene oxide (rGO), nickel silicate (NiSiO), nickel oxide/carbon (NiO/C)), has been developed to enhance the electrochemical performance of NiSiO. The incorporation of inner rGO provides structural support for NiSiO, enhancing conductivity, while the outer NiO/C layer not only boosts conductivity but also safeguards NiSiO from structural degradation and electrolyte dissolution. This architecture eliminates multi-phase mixtures, facilitating rapid electron/mass transfer kinetics and accelerating electrochemical reactions, resulting in exceptional electrochemical properties. The rGO@NiSiO@NiO/C architecture achieves a specific  capacitance of 324F⋅g− 1 at 0.5 A⋅g− 1, with a superb cycle performance of ~ 91 % after 10,000 cycles, surpassing state-of-the-art nickel silicates. Furthermore, the hybrid supercapacitor (HSC) device incorporating the rGO@NiSiO@NiO/C electrode attains an areal capacitance of 159 mF⋅cm− 2 at 2.5 mA⋅cm− 2, a retention ratio of ~ 98 % after 10,000 cycles, and an energy density of 0.68

Co-author: 李惠,孟庆飞,李文杰,吴际良,方永进

Indexed by: Journal paper

Correspondence Author: 黄驰*,曹余良*

Document Code: 2308053

Discipline: Natural Science

Document Type: J

Volume: 40

Issue: 9

Page Number: 2308053

Translation or Not: no

Date of Publication: 2024-09-01

Included Journals: SCI