School of Materials Science and Engineering;
Shaanxi University of Science and Technology;
Xi’an;
710021;
China;
Institute of Advanced Structure Technology;
Beijing Institute of Technology;
Beijing 100081;
China;
Department of Materials Science and Engineering;
College of Engineering;
Peking University;
Beijing 100871;
China;
SnS2/SnO2; Heterostructures; Potassium-ion batteries; Anode;