About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
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| Presentation Title |
Tracking Phase, Chemical and Morphological Changes in Co-Fe Oxides for Redox-Based Thermal Storage. |
| Author(s) |
Chirag Saharan, Yuxiang Peng, Lyu Zhou , Xianghui Xiao, Hui Zhong, Eli Stavitski, Sanjit Ghose, Akhil Tayal, Katherine Jungjohann , Judith Vidal , Shuang Cui, Mingyuan Ge, Karen Chen-Wiegart |
| On-Site Speaker (Planned) |
Chirag Saharan |
| Abstract Scope |
Thermochemical energy storage requires materials with high thermal stability and reversible redox chemistry. Cobalt oxide (Co₃O₄) is often considered as model candidate for long-term heat storage, but pure Co₃O₄ suffers from sluggish redox kinetics during repeated cycling. To address this limitation, Fe₂O₃ was introduced to form a Co₃O₄–Fe₂O₃ composite and its structural, chemical, and phase evolution during cycling were investigated. Thermogravimetric analysis and advanced in situ synchrotron techniques were employed, including transmission X-ray microscopy (TXM), X-ray diffraction, and X-ray absorption spectroscopy to study these transformations. Initial results show that Fe₂O₃ actively participates in redox reactions and accelerates reaction kinetics. TXM images reveal no new pore formation or morphological changes, unlike pure Co₃O₄. Fe₂O₃ helps to maintain structural integrity, and promotes faster redox kinetics. These findings demonstrate that iron integration has a potential to improve the long-term thermal performance and redox stability of cobalt oxide based thermochemical energy storage materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Energy Conversion and Storage, High-Temperature Materials |