Dual-active engineering of NiFe LDH nanosheets with anion intercalation and oxygen vacancies for high-performance aqueous nickel–zinc batteries

Abstract

Herein, 1,3,5-benzenetricarboxylate (BTC) intercalation and oxygen vacancy engineering are proposed to enhance the electrochemical performance of layered double hydroxide (LDH) nanosheets. The optimized LDH exhibits a remarkable capacity of 426 mAh g⁻¹ at 3 A g⁻¹ and 70% capacity retention after 15 000 cycles, attributed to improved ion transport, abundant active sites, and structural stability.