Department of Materials Science and Engineering;
Korea University;
Anam-Dong;
Seongbuk-Gu;
Seoul 136-713;
Republic of Korea;
Department of Advanced Materials Engineering;
Chung-Ang University;
4726 Seodong-daero;
Daedeok-myeon;
Anseong-si;
Gyeonggi-do 17546;
Republic of Korea;
MXene; Spray pyrolysis; Iron selenide; Potassium-ion batteries; 3D structures;