文献类型：期刊文献

英文题名：Two-Step Synthesis of ZnS-NiS2 Composite with Rough Nanosphere Morphology for High-Performance Asymmetric Supercapacitors

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

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：10

期号：1

外文期刊名：BATTERIES-BASEL

收录：;EI(收录号：20240515463724);WOS:【SCI-EXPANDED(收录号:WOS:001151782300001)】；

基金：No Statement Available

语种：英文

外文关键词：nickel disulfide; zinc sulfide; nanosphere; electrochemical characterization; asymmetric supercapacitor

摘要：Transition metal sulfides have excellent electrochemical performance and show great potential for improving the energy density of asymmetric supercapacitors. This study demonstrates a two-step synthesis technique and highlights the enhanced energy storage efficiency of ZnS-NiS2 composite materials for asymmetric supercapacitors. The composite materials of ZnS nanosheets and NiS2 nanocrystals are characterized by a rough surface and spherical shape. The sample with the optimal ratio (ZnS-NiS2-1:7) exhibits a maximum specific capacitance of 1467.9 F g(-1) (550.5 C g(-1)) at 1 A g(-1). The specific capacitance of the ZnS-NiS2-1:7 sample is 26.1% higher compared to the pure NiS2 sample. Furthermore, the assembled ZnS-NiS2-1:7//AC device shows a high specific capacitance of 127.8 F g(-1) (217.3 C g(-1)) at 1 A g(-1) and an energy density of 51.3 Wh kg(-1) at a power density of 820.8 W kg(-1). The ZnS-NiS2-1:7 sample has exceptional energy storage capability on its own, but it can also be composited with graphene to further increase the specific capacitance (1681.0 F g(-1) at 1 A g(-1)), suggesting promising prospects for the ZnS-NiS2-based composite material in the future.