Constructing nickel sulfide @ nickel boride hybrid nanosheet arrays with crystalline/amorphous interfaces for supercapacitors

Liu Wan; Yuqi Wang; Dianyu Jiang; Yan Zhang; Mingjiang Xie; Jian Chen; Cheng Du

doi:10.1016/j.jcis.2023.06.175

Constructing nickel sulfide @ nickel boride hybrid nanosheet arrays with crystalline/amorphous interfaces for supercapacitors

J Colloid Interface Sci. 2023 Nov:649:815-825. doi: 10.1016/j.jcis.2023.06.175. Epub 2023 Jun 26.

Authors

Liu Wan¹, Yuqi Wang¹, Dianyu Jiang¹, Yan Zhang¹, Mingjiang Xie¹, Jian Chen¹, Cheng Du²

Affiliations

¹ Hubei Key Lab for Processing and Application of Catalytic Materials, College of Chemical Engineering, Huanggang Normal University, Huanggang 437000, China.
² Hubei Key Lab for Processing and Application of Catalytic Materials, College of Chemical Engineering, Huanggang Normal University, Huanggang 437000, China. Electronic address: ducheng20141020@163.com.

PMID: 37390529
DOI: 10.1016/j.jcis.2023.06.175

Abstract

Designing a heterostructure with unique morphology and nanoarchitecture is regarded as an efficient strategy to achieve high-energy-density supercapacitors (SCs). Herein, a rational nickel sulfide @ nickel boride (Ni₉S₈@Ni₂B) heterostructure is in situ synthesized on carbon cloth (CC) substrate via a simple electrodepositon strategy followed by a chemical reduction method. The three-dimensional hierarchically porous Ni₉S₈@Ni₂B nanosheet arrays, consisting of crystalline Ni₉S₈ nanosheets and amorphous Ni₂B nanosheets, can expose ample electroactive centers, shorten ion diffusion distance, and buffer volume changes during charging/discharging process. More importantly, the generation of crystalline/amorphous interfaces in the Ni₉S₈@Ni₂B composite modulates its electrical structure and improves electrical conductivity. Owing to the synergy of Ni₉S₈ and Ni₂B, the as-synthesized Ni₉S₈@Ni₂B electrode acquires a specific capacity of 901.2C g^-1 at 1 A g^-1, a sound rate capability (68.3% at 20 A g^-1), along with good cycling performance (79.7% capacity retention over 5000 cycles). Additionally, the assembled Ni₉S₈@Ni₂B//porous carbon asymmetric supercapacitor (ASC) exhibits a cell voltage of 1.6 V and a maximum energy density of 59.7 Wh kg^-1 at 805.2 W kg^-1. These findings might offer a simple and innovative approach to fabricate advanced electrode materials for high-performance energy storage systems.

Keywords: Asymmetric supercapacitors; Electrodeposition; Nanosheet arrays; Nickel boride; Nickel sulfide.