MnSe2 nanocubes as an anode material for sodium-ion batteries

Abstract We report a simple and scalable synthesis of MnSe 2 nanocubes as the Na-ion battery anode materials. The as-prepared MnSe 2 nanocubes electrode achieves a four-electron reaction with an enhanced reversible capacity 249 mAh g −1 at 0.1 A g −1 and a 90.8% capacity retention after 100 cycles, which could be attributed to the particle-size decreasing from micrometer to nanometer scale and the usage of diglyme-based electrolyte. This work envisions the great potential of nano-sized metal selenides toward Na + ion storage.