1. Department of Materials Science & Engineering Chonnam National University Gwangju 61186 Republic of Korea
2. Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology (KENTECH) 200 Hyeoksin‐ro Naju Jeonnam 58330 Republic of Korea
3. Samsung Electronics Co., Ltd. Suwon‐si Gyeonggi‐do 16677 Republic of Korea
4. Research Institute NEEL Sciences, INC. Jeollanamdo 58326 Republic of Korea
5. Department of Chemistry Korea University Seoul 02841 Republic of Korea
6. Department of Polymer Science and Engineering Dankook University Yongin Gyeonggi 16890 Republic of Korea