1. Department of Advanced Interconnection MaterialsThe Institute of Scientific and Industrial ResearchOsaka University Mihogaoka 8‐1 Ibaraki Osaka 567‐0047 Japan
2. Department of Energy Conversion and StorageTechnical University of Denmark Frederiksborgvej 399 Roskilde 4000 Denmark
3. E‐ThermoGentek Co., Ltd. 102 Kujyo CID bld. 13 Shimotonodacho, Higashikujo, Minami‐ku Kyoto 601‐8047 Japan