NiCo‐glycolate‐derived porous spherical NiCo2S4 for high‐performance asymmetric supercapacitors

• DOI: 10.1002/aoc.7301
• Publication Date: 2023-11-01T04:24:57Z
• Authors: Maiyong Zhu; Congcong Lu; Yunping Ma; Yu Yang
• Keywords: Bimetallic strip; Cobalt sulfide; Iron sulfide

The construction of electrode materials with high rate and excellent cycling stability is the key to supercapacitors. Due their remarkable conductivity great electrochemical activity, transition bimetallic sulfides are extremely appealing for supercapacitors, but synthesis still challenging. In this study, a NiCo sulfide (NiCo 2 S 4 ) microspheres porous structure were prepared via direct vulcanization NiCo‐EG complexes followed by thermal treatment, which pre‐synthesized coordination ethylene glycol (EG) metal ions (Ni 2+ , Co under hydrothermal condition. Some experimental parameters investigated, including control produced ratio precursor different masses sulfur sources, in turn affects properties. When applied as supercapacitor, obtained optimal condition delivered capacitance (1386 F g −1 at 1 A ), capability (845 10 stable performance (80.05% after 5000 cycles A/g). Furthermore, checking practicality microspheres, an asymmetric supercapacitor device was built using activated carbon (AC) negative positive electrode. assembled //AC cell had power density 799.9 W kg energy 30.5 Wh confirming that structurally optimized nanomicrospheres have properties wide range application prospects.