Dalian Institute of Chemical Technology has developed a flexible phase change energy storage material film

Source: Dalian Institute of Chemical Physics?? Recently, the team of researcher Shi Quan of the Thermochemistry Research Group (DNL1903) of the Hydrogen Energy and Advanced Materials Research Department of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and the State Key Laboratory of Catalysis Fundamental Two-dimensional Materials Chemistry and Energy The application research group (group 508) researcher Wu Zhongshuai team worked together to develop a flexible phase change energy storage material film through a simple and easy synthesis strategy, and combined it with a flexible graphene film to apply to wearable thermal management devices
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The phase change material film has good mechanical flexibility, can be cut and folded in shape, and has a long cooling and heating cycle life.
The material always remains solid during the phase change process, which can realize large-scale preparation, and is for the development of high-performance flexible phase change energy storage materials and thermal management The device provides new methods and ideas
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Phase change energy storage materials can absorb and release a large amount of latent heat at a constant temperature, and can be used as a high-efficiency thermal energy storage and temperature control medium in the field of thermal management of electronic devices
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However, traditional phase change energy storage materials generally use their solid-liquid phase transition behavior for energy storage and temperature control.
Solid phase materials are not flexible due to their high rigidity.
Liquid phase materials leak during the phase change process and cannot be used for flexibility.
Thermal management of wearable devices
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In response to this problem, Shi Quan's team obtained a flexible phase change energy storage material film through chemical polymerization
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The phase change material film has apparent solid-solid phase transition characteristics, the phase transition enthalpy and phase transition temperature are adjustable within a temperature range of 5-60°C, and it still exhibits stable phase transition performance after 1000 cycles of cooling and heating
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In addition, the phase change material film exhibits excellent intrinsic flexibility, can be folded or cut into any shape, and a large-size film can be prepared, which provides the possibility for large-scale preparation of flexible phase change material film
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The phase change material film is integrated with the flexible graphene film developed by Wu Zhongshuai’s team to obtain a flexible thermal management device, which can exhibit excellent temperature control, photothermal conversion and electrothermal conversion performance under different temperature, light and electrical heating conditions, and the highest electrical -The heat conversion efficiency can reach 94%
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Researchers further sew large-size flexible thermal management devices onto clothes.
The flexible device maintains stable thermal management performance during the bending action of the human body.
It has important application prospects in the development of next-generation flexible wearable thermal management devices
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Recently, related research results were published on "Energy Storage Materials"
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The research work was funded by the Innovation Fund of Dalian Institute of Chemical Technology and the National Natural Science Foundation of China
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