High-capacity and ultrastable lithium storage in SnSe₂–SnO₂@NC microbelts enabled by heterostructures

Abstract

SnSe 2 –SnO 2 @NC were investigated for lithium-ion batteries with a capacity of 1023.5 mA h g −1 at 0.2 A g −1 and a capacity of 632.7 mA h g −1 after 2800 cycles at 5 A g −1 . DFT calculations revealed the high adsorption energy of SnSe 2 –SnO 2 .