ZnFe2O4–Ni5P4 Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

• DOI: 10.1021/acsami.2c04734
• Publication Date: 2022-05-17T09:42:30Z
• Authors: Dan Zhang; Yixin Luo; Jiaxiang Liu; Yu Dong; Cong Xiang; Chenke Zhao; Hongbo Shu; Jianhua Hou; Xianyou Wang; Manfang Chen
• Keywords: 01 natural sciences; 0104 chemical sciences

The practical progress of lithium–sulfur batteries is hindered by the serious shuttle effect and slow oxidation–reduction kinetics polysulfides. Herein, ZnFe2O4–Ni5P4 Mott–Schottky heterojunction material prepared to address these issues. Benefitting from a self-generated built-in electric field, as an efficient bidirectional catalysis regulates charge distribution at interface accelerates electron transfer. Meanwhile, synergy strong adsorption capacity derived metal oxides outstanding catalytic performance that comes phosphides strengthens polysulfides, reduces energy barrier during reaction, conversion between sulfur species, further reaction kinetics. Hence, cell with ZnFe2O4–Ni5P4/S harvests high discharge 1132.4 mAh g–1 0.5C displays Coulombic efficiency 99.3% after 700 cycles. battery still maintains 610.1 84.4% retention 150 cycles 0.1C under loading 3.2 mg cm–2. This work provides favorable reference advanced guidance for developing heterojunctions in batteries.