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Preparation of amorphous silver-ear-shaped CoNi2S4 cathode materials by sacrificial template method and its performance in asymmetric supercapacitors

Qianglong Chen,Ruibin Guo,Yangyang Jiang,Li li,Wenjing Qin,Yanchun Tan,Nijuan Liu,Zunli Mo

Three-dimensional amorphous silver lug-like CoNi 2 S 4 electrode materials have been designed and synthesised by the sacrificial template method. Through a clever combination of Ni 2+ induced template deficiency and sulphidation reactions, the rearrangement of the electronic structure can be promoted, generating more defects. The Ni element-doped electrode significantly improves the capacitance due to the bimetallic synergy and has a high mass specific capacitance of 1351 F g −1 at a current density of 4 A g −1 . The specific capacitance was 1111 F g −1 at a current density of 20 A g −1 , showing an excellent multiplicative performance (82.2%).