Published: Jan. 1, 2023

P2-type manganese-based layered oxides are regarded as promising cathode material for sodium-ion batteries. However, irreversible interfacial reactions occurring on non-sodium-containing anode will markedly consume active Na+ ions in oxides, leading to rapid capacity decay full cell. Herein, a highly efficient sodium compensation additive, formate (HCOONa), is proposed. The results show that the cell based Na0.66Ni0.26Zn0.07Mn0.67O2 (NNZMO) and hard carbon with HCOONa additive can provide 95.7 mAh g–1 first-cycle discharge specific 81.3% retention after 100 cycles at mA g–1, much higher than those (71.8 55.7%) of NNZMO without formate. This strategy provides new way increasing operation stability also expected be applicable other materials.

Language: Английский