Heterostructure CuSe/MnSe2 with Se Vacancies of Rapid Ion Kinetics for Low-temperature Sodium-ion Batteries

Abstract

Herein, a CuSe/MnSe2 heterostructure with Se vacancies is fabricaed as an ultrafast anode for low-temperature sodium-ion batteries. It achieves 380.3 mAh g-1 after 1500 cycles (3.0 A g-1) and 403.6 mAh g-1 at -30°C (0.5 A g-1), highlighting exceptional cyclability and low-temperature adaptability.