Bimetallic sulfide based on various carbon materials for supercapacitors

Yaochen Song,Xinran Li,Jiaxuan Liao,Junchao Wang,Mengqiang Wu,M.S Nazir,H.A Aziz

doi:10.1051/e3sconf/202125701075

Abstract

The NiCo2S4/C hybrid material was successfully prepared by a simple one-step hydrothermal method. Carbon composite increases the specific surface area of the material and provides more ion attachment points during the electrochemical process. Conducive to the ion transportation and transfer, the composition of carbon material greatly improves the conductivity of the hybrid material. Electric double-layer capacitor materials can accept transferred ions faster than pseudocapacitor materials, enable the hybrid materials better adapt to intensity current changes. Compared with a single carbon material or a pseudocapacitance material, it has a higher specific capacity. This discovery is of great significance to the research of pseudocapacitive materials and supercapacitors.

Highlights

Supercapacitors have become a research hotspot in the field of energy storage in recent years because of their high-power density, stable long cycle life, low price, and simple production
Li Y et al added Co2+ in order to improve the cycle performance of a single nickel sulfide, and the results showed that its cycle life has been greatly enhanced [6]
The NiCo2S4 material was prepared by a one-step hydrothermal method. 1.7448 g Ni(NO3)2ꞏ6H2O, 3.4926 g Co(NO3)2ꞏ6H2O, 0.1g polyvinylpyrrolidone (PVPK30), 1.8 g thioacetamide and a certain amount of carbon materials were sequentially added to a mixed solution of ethylene glycol and deionized water

Summary

Introduction

Supercapacitors have become a research hotspot in the field of energy storage in recent years because of their high-power density, stable long cycle life, low price, and simple production. Studies have shown that transition metal oxides and sulfides based on multivalent ions such as Co [1], Ni [2], Mn[3,4], etc., have an outstanding performance, in capacity Such pseudocapacitance materials are often unsatisfactory in terms of cycle performance and rate performance. The structure, morphology and electrochemical performance of the sulfide are adjusted by adjusting the type and quality of the carbon source, so as to determine the optimal process parameters to achieve high specific capacity, good rate characteristics and excellent cycle stability. Analysis and comparison, the electrochemical performance of NiCo2S4 has been significantly improved after forming a composite material with carbon Among them, it has the highest specific capacity after being. AESEE 2021 composited with high-conductivity carbonylated carbon nanotubes, and it reaches 1939.12 F/g under the current density of 1 A/g, and can still maintain excellent performance under even higher current density

Experimental Section

Results and discussion

Conclusion