Ultrafast surface modification of Ni3S2 nanosheet arrays with Ni-Mn bimetallic hydroxides for high-performance supercapacitors

Xu Zou; Qing Sun; Yuxin Zhang; Guo-Dong Li; Yipu Liu; Yuanyuan Wu; Lan Yang; Xiaoxin Zou

doi:10.1038/s41598-018-22448-w

Ultrafast surface modification of Ni₃S₂ nanosheet arrays with Ni-Mn bimetallic hydroxides for high-performance supercapacitors

Sci Rep. 2018 Mar 14;8(1):4478. doi: 10.1038/s41598-018-22448-w.

Authors

Xu Zou¹, Qing Sun², Yuxin Zhang³, Guo-Dong Li¹, Yipu Liu¹, Yuanyuan Wu¹, Lan Yang¹, Xiaoxin Zou⁴

Affiliations

¹ State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
² State Key Laboratory of Mechanical Transmissions, College of Material Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China.
³ State Key Laboratory of Mechanical Transmissions, College of Material Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China. zhangyuxin@cqu.edu.cn.
⁴ State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China. xxzou@jlu.edu.cn.

Abstract

Amorphous Ni-Mn bimetallic hydroxide film on the three-dimensional nickle foam (NF)-supported conductive Ni₃S₂ nanosheets (denoted as Ni-Mn-OH@Ni₃S₂/NF) is successfully synthesized by an ultrafast process (5 s). The fascinating structural characteristic endows Ni-Mn-OH@Ni₃S₂/NF electrodes better electrochemical performance. The specific capacitance of 2233.3 F g^-1 at a current density of 15 A g^-1 can achieve high current density charge and discharge at 20/30 A g^-1 that the corresponding capacitance is 1529.16 and 1350 F g^-1, respectively. As well as good cycling performance after 1000 cycles can maintain 72% at 15 A g^-1. The excellent performance can be attributed to unique surface modification nanostructures and the synergistic effect of the bimetallic hydroxide film. The impressive results provide new opportunity to produce advanced electrode materials by simple and green route and this material is expected to apply in high energy density storage systems.