1. Department of Materials Science and Engineering, Hongik University, Seoul 04066, South Korea
2. High Temperature Energy Conversion Laboratory, Korea Institute of Energy Research, Daejeon 34129, South Korea
3. Department of Mechanical Engineering, Hongik University, Seoul 04066, South Korea
4. HtoEn Co., Ltd, Pohang 37778, South Korea
5. Department of Advanced Energy and System Engineering, University of Science and Technology, Daejeon 34113, South Korea