Potassium-ion storage behavior of microstructure-engineered hard carbons† Hoseong Kim,a Jong Chan Hyun,b Ji In Jung,a Jin Bae Lee,c Jaewon Choi,d Se Youn Cho,e Hyoung-Joon Jin*af and Young Soo Yun *bg Author affiliations * Corresponding authors a Program in Environmental and Polymer Engineering, Inha University, Incheon, South Korea b KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, South Korea c Korea Basic Science Institute, 169-147, Daejeon, South...