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Preparation and performance characterization of ultra-low carbon coal-gangue-based composite phase-change materials
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Meichao YIN1, Yaxuan XIONG1, 2, Jing YAN3, Zeling JIANG1, Meng LI1, Jing REN4, Yuting WU5, Cancan ZHANG5, Yulong DING6
Thermal Power Generation | 2026, 55(6) : 63 - 72
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Thermal Power Generation | 2026, 55(6): 63-72
• Energy storage technology research •
Preparation and performance characterization of ultra-low carbon coal-gangue-based composite phase-change materials
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Meichao YIN1, Yaxuan XIONG1, 2, Jing YAN3, Zeling JIANG1, Meng LI1, Jing REN4, Yuting WU5, Cancan ZHANG5, Yulong DING6
Affiliations
  • 1.Beijing Key Lab of Heating, Gas Supply, Ventilating, and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102600, China
  • 2.Beijing Engineering Research Center for Sustainable Urban Drainage System, Beijing 102600, China
  • 3.Beijing Tianyueheng Housing Management & Administration Co., Ltd., Beijing 100032, China
  • 4.Beijing Building Research Institute Co. Ltd. of CSCEC, Beijing 100076, China
  • 5.Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
  • 6.Birmingham Center for Energy Storage, University of Birmingham, Birmingham B15 2TT, UK
Published: 2026-06-25 doi: 10.19666/j.rlfd.202507128
Outline
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To reduce the production costs and carbon emissions associated with phase change composite materials, coal gangue was utilized as the skeletal raw material, and NaNO3 was used as the phase change material to prepare of composite thermal energy storage materials. Through the cold pressing and hot sintering method, nine distinct composite phase change materials with varying coal gangue to NaNO3 ratios were successfully synthesized. The fundamental properties of these coal gangue-based composite phase change materials were systematically investigated, encompassing thermal storage capacity, microstructural characteristics, mechanical strength, chemical compatibility, and economic viability. Results demonstrated that the composite with a coal gangue to NaNO3 mass ratio of 4.5:5.5 (designated as sample SC3) exhibited optimal performance across all evaluated parameters. Specifically, sample SC3 achieved a mechanical strength of 49.33 MPa. Within the temperature range of 100 ℃ to 335 ℃, its thermal storage capacity reached 399.29 J/g, accompanied by a thermal conductivity of 1.484 W/(m·K). Elemental distribution within this composite was found to be homogeneous, and chemical compatibility between constituents was excellent. Furthermore, after undergoing 1858 thermal cycles of heating and cooling, sample SC3 retained remarkable thermal storage performance, stable mechanical properties, and maintained its physical integrity without degradation.

coal mine solid waste  /  coal gangue  /  composite phase change thermal storage material  /  chemical compatibility  /  energy storage
Meichao YIN, Yaxuan XIONG, Jing YAN, Zeling JIANG, Meng LI, Jing REN, Yuting WU, Cancan ZHANG, Yulong DING. Preparation and performance characterization of ultra-low carbon coal-gangue-based composite phase-change materials[J]. Thermal Power Generation, 2026 , 55 (6) : 63 -72 . DOI: 10.19666/j.rlfd.202507128
Funding
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  • National Key Research and Development Program: Key Special Projects for International Science and Technology Innovation Cooperation between Governments(2025YFE0118800)
Appendix
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Year 2026 volume 55 Issue 6
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292
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Article Info
doi: 10.19666/j.rlfd.202507128
  • Receive Date：2025-07-12
  • Online Date：2026-08-14
  • Published：2026-06-25
Article Data
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History
  • Received：2025-07-12
  • Revised：2025-08-21
  • Accepted：2025-08-22
Funding
National Key Research and Development Program: Key Special Projects for International Science and Technology Innovation Cooperation between Governments(2025YFE0118800)
Affiliations
    1.Beijing Key Lab of Heating, Gas Supply, Ventilating, and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102600, China
    2.Beijing Engineering Research Center for Sustainable Urban Drainage System, Beijing 102600, China
    3.Beijing Tianyueheng Housing Management & Administration Co., Ltd., Beijing 100032, China
    4.Beijing Building Research Institute Co. Ltd. of CSCEC, Beijing 100076, China
    5.Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
    6.Birmingham Center for Energy Storage, University of Birmingham, Birmingham B15 2TT, UK
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202507128
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表12种不同金属材料的力学参数
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Number of
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Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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