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2D Nanosheets /3D Cubic Frameworks Ni-Co Sulfides for Improved Supercapacitors Performance via Structurally Engineering

Abstract

The construction of multi-dimensional structured battery-type electrode materials is a promising strategy to develop high performance electrodes for supercapacitors. Herein, a series of battery-type Ni3S2@Co3S4 electrodes with different morphologies are synthesized by controlling the hydrothermal reaction time. Owning to the unique structure with independent but interconnected 2D nanosheets and 3D cubic frameworks, NCS-60 displays high conductivity, rich active sites and good wettability behaviors. It can deliver a high specific capacity of 388.9 mAh g-1 (3500 F g-1) at 1 A g-1, outstanding rate capacity of keeping 88.6% at 10 A g-1 and long cycle stability. The battery-type supercapacitors hybrid (BSH) device with active carbon (AC) as the negative electrode delivers energy density of 41.8 W h kg-1 at the power density of 800 W kg-1. This work provides a feasible route for regulating morphologies of in-situ growth materials and then improves the electrochemical performance for supercapacitors.

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Supplementary files

Article information


Submitted
20 Apr 2020
Accepted
21 May 2020
First published
21 May 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

2D Nanosheets /3D Cubic Frameworks Ni-Co Sulfides for Improved Supercapacitors Performance via Structurally Engineering

Q. Zhang, Q. Shi, Y. Yang, Q. Zang, Z. Xiao, X. Zhang and L. Wang, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT01430C

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