NiCo2S4 nanosheet grafted SiO2@C core-shelled spheres as a novel electrode for high performance supercapacitors

Muhammad Sajjad; Yuhan Jiang; Linlin Guan; Xu Chen; Azhar Iqbal; Shuyu Zhang; Yang Ren; Xiaowei Zhou; Zhu Liu

doi:10.1088/1361-6528/ab4d0a

NiCo₂S₄ nanosheet grafted SiO₂@C core-shelled spheres as a novel electrode for high performance supercapacitors

Nanotechnology. 2020 Jan 17;31(4):045403. doi: 10.1088/1361-6528/ab4d0a. Epub 2019 Oct 11.

Authors

Muhammad Sajjad¹, Yuhan Jiang, Linlin Guan, Xu Chen, Azhar Iqbal, Shuyu Zhang, Yang Ren, Xiaowei Zhou, Zhu Liu

Affiliation

¹ School of Physics and Astronomy, Yunnan University, Kunming 650091, Yunnan Province, People's Republic of China.

PMID: 31604342
DOI: 10.1088/1361-6528/ab4d0a

Abstract

A high-performance supercapacitor electrode NiCo₂S₄ (NCS) nanosheet on SiO₂@C core-shell nanospheres (SiO₂@C-NCS nanocomposite) is prepared via simple an effective solution-based method. Benefiting from compositional and structural advantages, the as-prepared SiO₂@C-NCS nanocomposite exhibits a high specific capacitance (625 F g^-1 at 1 mA cm^-2) and a stable cycling performance. An asymmetric supercapacitor (ASC) assembled with SiO₂@C-NCS nanocomposite as a positive electrode and carbon nanotube paper as a negative electrode in aqueous KOH solution demonstrated a high energy density of 16 Wh kg^-1 at an ultra-high specific power of 7200 W kg^-1. These promising results suggest the possible application of mixed transition metal sulfides-based composites as advanced electrode materials for high-performance ASCs.