文献类型：期刊文献

英文题名：Two Step Synthesis of Zns-Nis2 Composite with Rough Nanosphere Morphology for Asymmetric Supercapacitors

作者：Jiang, Meng[1]; Chen, Xin[1]; Yi, E.[1]; Tan, Liyi[1]; Yan, Wei[1]; Liu, Yang[1]; Abdullah, Muhammad[1]; Jiang, Wenrui[1]

机构：[1] Key Laboratory for Ultrafine Materials, Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230300738)

语种：英文

外文关键词：Capacitance - Composite materials - Energy storage - II-VI semiconductors - Morphology - Nanospheres - Nickel compounds - Supercapacitor - Transition metals

摘要：Transition metal sulfides have excellent electrochemical performance, and show great potential for improving the energy density of asymmetric supercapacitors. Two-step synthesis strategy and increased energy storage performance of ZnS-NiS2 composite materials for asymmetric supercapacitors are demonstrated in this work. In the rough surfaced spherical ZnS-NiS2 composite materials, ZnS nanosheets and NiS2 nanocrystals are composited together, with the optimal ZnS-NiS2 composite ratio sample (ZnS-NiS2-1:7) showing the highest specific capacitance of 1467.9 F/g at 1A/g. When compared with pure NiS2 sample, the specific capacitance of the ZnS-NiS2-1:7 sample is 303.6 F/g (26.1%) higher. Besides, the assembled ZnS-NiS2-1:7//AC device shows a high specific capacitance of 127.8 F/g at 1 A/g and an energy density of 51.3 Wh/kg at a power density of 820.8W/kg. Not only does the ZnS-NiS2-1:7 sample itself have outstanding energy storage performance, it can also be composited with graphene for further specific capacitance improvement (1681.0 F/g at 1 A/g), indicating good future development opportunities of the ZnS-NiS2 based composite material. ? 2023, The Authors. All rights reserved.