Nickel–Cobalt Sulfide Nanosheets Anchored on Porous Carbon for Energy Storage and Small-Molecule Detection

作者：Tong Guo, Wenbin Cao, Dawei Zheng, Yigang Ding, Dong Liu · 发表于：ACS Applied Nano Materials · 年份：2023 · DOI：10.1021/acsanm.3c04231 · 被引用次数：9 · 研究领域：Supercapacitor Materials and Fabrication、Advancements in Battery Materials、Graphene research and applications

Transition metal sulfides (TMSs) are considered to be highly promising electrode materials for supercapacitors. Optimizing the structure of the electrode materials to expose more active sites is a crucial strategy for boosting the electrochemical performance. Herein, we developed carbon/metal sulfide composite electrode materials by anchoring nickel–cobalt bimetallic sulfide nanosheets (NCS) on chitosan-derived heteroatom-doped hierarchical porous carbon (CPC). The composite materials exhibited a uniform distribution and significantly increased active sites, which led to a substantial enhancement of the electrochemical properties. The optimal sample NCS/CPC-3 exhibited a brilliant capacitive performance and great cycling stability. Also, the assembled asymmetric supercapacitor presented a robust energy output of 37.1 W h kg –1 at 800.0 W kg –1 . In addition, NCS/CPC-3 also demonstrated potential in the field of small-molecule detection. Our findings supply a unique perspective on effectively boosting the electrochemical properties of TMS-based electrode materials.