Liyi Zou

Wuhan University of Technology

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Xiaomin Cheng

Wuhan University of Technology

Linfeng Li

Jiangxi Normal University

Yuanyuan Li

Wuhan University of Technology

Wenbin Li

Dalian University

Wei Ji

Taiyuan University of Technology

Huachen Liu

Second Hospital of Shanxi Medical University

S. Li

Sanya University

Zhenqiang Ma

Wuhan University of Technology

Xi Wu

Shanxi Jincheng Anthracite Mining Group (China)

Yueming Li

Harbin Engineering University

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Wuhan University of Technology

State Key Laboratory of Advanced Technology For Materials Synthesis and Processing

Wuhan Textile University

Central South University

Huanggang Normal University

Chinese Academy of Sciences

East China University of Science and Technology

Wuhan University

State Key Laboratory of Pollution Control and Resource Reuse

Zhejiang University

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ZnO‐Reinforced Thermal Regulating Microcapsules with Double‐Layer Shell via Atomic Layer Deposition

Advanced Materials Interfaces (2022)

Linfeng Li Xi Wu Xiaomeng Zhu Yuanyuan Li Liyi Zou

Abstract Conventional plain organic or inorganic shell for microcapsules has their own drawbacks, the organic shell has defects in thermal conductivity and stability; while the compactness and coverage of inorganic shell are not satisfactory. Herein, a novel approach to synthesis of organic–inorganic composite double‐layer shell phase change microcapsule (DLSPCM) is proposed, which is achieved by forming inorganic outer shell on the surface of organic shell via atomic layer deposition (ALD). Taking the pristine microcapsule with paraffin core and melamine formaldehyde (MF) shell as an example, MF‐ZnO composite double‐layer shell (DLS) is formed in this paper. The melting enthalpy of DLSPCM obtained by 100 ALD cycles is 159.7 J g −1 , which is only 12.1 J g −1 lower than that of paraffin @ MF microcapsules (control sample), while the thermal conductivity of DLSPCM surges by 77.8%, and the thermal energy storage ability and thermal regulation performance are basically maintained. After 900 thermal cycles, the heat storage capacity of DLSPCM obtained by 100 ALD cycles decreased by only 3%. Besides, the photocatalytic performance and antibacterial activity of ZnO‐reinforced DLSPCM are further confirmed. The successful design of DLSPCM via ALD is prospective for the encapsulation, modification, and reinforcement of phase change microcapsules.

Melamine resin

Thermal Stability

Phase-change material

10.1002/admi.202200541

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Citations (7)

Performance improvement and investigation of radiation heat transfer of chloride salt as high-temperature heat storage medium

Applied Thermal Engineering (2022)

Zhenqiang Ma Linfeng Li Liyi Zou Huachen Liu Yuanyuan Li

Phase-change material

Heat transfer fluid

Concentrated solar power

10.1016/j.applthermaleng.2022.119494

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Citations (7)

Crystalline TiO2 shell microcapsules modified by Co3O4/GO nanocomposites for thermal energy storage and photocatalysis

Materials Today Sustainability (2022)

S. Li Wei Ji Liyi Zou L. Li Youbin Li

10.1016/j.mtsust.2022.100197

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Fabrication, Structure, and Thermal Properties of Mg–Cu Alloys as High Temperature PCM for Thermal Energy Storage

Materials (2021)

Zheng Sun Liyi Zou Xiaomin Cheng Jiaoqun Zhu Yuanyuan Li

This work studied the thermophysical properties of Mg-24%Cu, Mg-31%Cu, and Mg-45%Cu (wt.%) alloys to comprehensively consider the possibility of using them as thermal energy storage (TES) phase change materials (PCMs) used at high temperatures. The microstructure, phase composition, phase change temperatures, and enthalpy of these alloys were investigated by an electron probe micro analyzer (EPMA), X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The XRD and EPMA results indicated that the binary eutectic phase composed of α-Mg and Mg2Cu exists in the microstructure of the prepared Mg–Cu series alloys. The microstructure of Mg-24%Cu and Mg-31%Cu is composed of α-Mg matrix and binary eutectic phases, and Mg-45%Cu is composed of primary Mg2Cu and binary eutectic phases. The number of eutectic phases is largest in Mg-31%Cu alloy. The DSC curves indicated that the onset melting temperature of Mg-24%Cu, Mg-31%Cu, and Mg-45%Cu alloys were 485, 486, and 485 °C, and the melting enthalpies were 152, 215, and 91 J/g. Thermal expansion and thermal conductivity were also determined, revealing that the Mg–Cu alloys had a low linear thermal expansion coefficient and high thermal conductivity with respect to increasing temperatures. In conclusion, the thermal properties demonstrated that the Mg–Cu alloys can be considered as a potential PCM for TES.

10.3390/ma14154246

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Citations (4)

Regulation of thermal conductivity of microencapsulated phase change materials via atomic layer deposition

Journal of Energy Storage (2023)

Linfeng Li Yaoqi Huang Wenbin Li Liyi Zou Xi Wu

Phase-change material

Thermal Stability

10.1016/j.est.2023.107668

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Performance Improvement and Investigation of Radiation Heat Transfer of Chloride Salt as High-Temperature Heat Storage Medium

SSRN Electronic Journal (2022)

Zhenqiang Ma Linfeng Li Liyi Zou Yuanyuan Li Huachen Liu

The development of solar phase change thermal storage technology is of great significance for the efficient use of energy. In this study, molten chloride salt was used as a high-temperature phase change thermal storage material, and the thermal properties of the chloride salt were modified by generating excess carbon in the molten salt through the reaction between citric acid and sodium chlorite, and the ra-diative heat transfer capability of the modified molten salt at high temperature was investigated by numerical simulation. The results indicated that the flake carbon generated by the reaction was uniformly distributed in the molten salt matrix, and the modified molten salt obtained a high latent heat of phase change with a maxi-mum latent heat of phase change of 227.3 J·g–1, which was increased by 13.7%. In addition, the heating process was simulated by the finite element software ANSYS, and the radiation heat transfer effectively improved the heating of the molten salt in the high temperature stage, which plays an essential role in the use of phase change materials.

10.2139/ssrn.4102550

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Citations (1)

Synthesis of TiO2 shell microcapsule-based phase change film with thermal energy storage and buffering capabilities

Materials Today Sustainability (2022)

Liyi Zou S. Li Linfeng Li Wei Ji Yueming Li

Phase-change material

Thermal energy

10.1016/j.mtsust.2022.100119

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Citations (19)