Superior electrochemical performances of SnS–SnO2/NRGO heterostructures-based lithium anode with enhanced electric field effect

Inducing built-in charge transfer driving forces by constructing heteronanostructures resulted in the fascinating materials for next generation high speed electronics, optoelectronics and energy storage applications. Controllable syntheses of heteronanostructures with built-in charge transfer benefitted the specific charge transfer kinetics, thereby enhancing the electrochemical performances, when evaluated as an anode material for lithium-ion batteries (LIBs). In the present study, novel conversion type heteronanostructures consisting of p-type SnS and n-type SnO2 was successfully fabricated using graphene oxide templates, which ultimately caused the construction of SnS–SnO2/NRGO composites. The formation of the indigenous electric field in resultant composites facilitated the charge transfer kinetics, thereby boosted electrochemical properties. When used as an electrode material in lithium-ion batteries (LIBs), synthesized composite materials deliver extraordinary specific capacity, long-term electrochemical cycling characteristics and outstanding rate capacity (1120 mAhg−1over 500 cycles measured @100 mAg−1).