INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2020
·Vol. 45
·期 5
·7675-7688
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IF 3.741
Qinrong Sun,Nan Zhang,Xiaoping Yu,Fali Ju,Imre Miklós Szilágyi,Yanping Yuan
Summary Phase change materials (PCMs) have limited use in thermal storage because of their poor conductivity and lack of multi driving energy. Therefore, to overcome these problems, polyethylene glycol-calcium chloride/expanded graphite (PEG-CaCl 2 /EG) functional composite PCMs with high electrical and thermal conductivities were synthesized by ligand substitution using PEG-CaCl 2 as the PCM and EG as the highly electrically and thermally conductive framework material. The PEG-CaCl 2 /EG PCMs were thoroughly investigated, and the experimental results revealed the significance of EG in the composite structure, which leads to high electrical conductivity and high thermal conductivity. The resistivity of the functional PCM decreased to 1.67 Ω m, and the thermal conductivity ( k ) increased to 8.4 W/(m K) when the EG content was 10 wt%. In addition, the electro-thermal conversion efficiency of the functional PCM reached 86.9%, and its energy storage could be inspired at low voltages (2.0-5.0 V). The heating and energy storage rates increased with the working voltage and EG content, respectively. Melting-crystallization experiments and electro-thermal cycle tests showed that the functional PCMs had good thermal stability. Therefore, this study provides a new perspective for various fields of energy conversion and storage.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Guangwei Shao,Wenlong Huang,Xin Zhang,Junjie Pan,Minghao Li,Hongjie Li,Renbiao Zhang,Bixia Sun,Zhihao Li,Qiusen He,Wenfeng Hu,Siyi Bi,Huiqi Shao,Jinhua Jiang,Nanliang Chen
The extremely cold environment restricts certain activities, making the preparation of a material with both heating and insulation functions a significant challenge. This study presents the large space warp-knitted composite fabric (LSWCF) as an electric heating inflatable material with a three-dimensional structure. It is designed and developed from three modes to mitigate heat loss. The top layer of LSWCF is combined with the electric heating film as the heating layer, showing high electric heating efficiency (577.33 °C/(W·cm–2)), high electrothermal conversion efficiency (95%), and excellent conductivity (12.5 S/cm). The bottom layer of LSWCF is coated with TiO2/WPU coatings as a thermal radiation layer. The inflated LSWCF retains a substantial volume of still air within its middle layer and exhibits low thermal conductivity (0.037 W·m–1·K–1), with resulting minimization of heat loss due to convection and conduction. LSWCF’s radiant coating, on the other hand, reduces heat loss through directed radiation. Contributed to the structural design, the LSWCF demonstrates an enhanced ability to generate heat at low temperatures (up to 35 °C at −20 °C, 980 W·m–2) compared to the existing literature. This study offers a novel strategy for the development of materials for use in extremely cold environments.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Kaili Qiu,Ahmed Elhassan,Tianhe Tian,Xia Yin,Jianyong Yu,Zhaoling Li,Bin Ding
Controlling thermal energy is one of the biggest concerns along with the progress of human civilization for thousands of years. Current thermal comfort devices are mainly based on materials that are bulky, rigid, and heavy, largely limiting their widespread practical applications. It still remains a challenge to develop highly lightweight, flexible, and efficient electrical heaters for personal thermal management and local climate control. In this work, we present a high-performance composite infrared radiation heating fabric (IRHF), which mainly consists of two layers of poly(ethylene terephthalate) (PET) fabrics and one sandwiched layer of carbon nanofibers embedded with different inorganic nanoparticles. A copper electrode sheet was connected with the carbon nanofibers to form a conductive heating circuit. The permanent spontaneous polarization of both carbon nanofibers and infrared radiation nanoparticles can facilitate an enhanced current in the heater by creating an additional electrical field, which results in a fast electrothermal response and favorable heat preservation. The constructed IRHF could achieve an increase in the temperature to 43 °C from room temperature in 1 min under a voltage of 30 V, with an electrothermal conversion efficiency up to 78.99%. With a collection of compelling features such as good thermal stability, excellent flexibility and breathability, and high electrical conductivity and energy conversion efficiency, the fabricated sandwich-structured IRHF can open up new opportunities to develop smart heating textiles and wearable heating clothes in many fields.
研究领域:
材料科学
·
纺织工程
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Xuefeng Li,Chunhua Ge,Keke Chen,Hongyu Guan,Xiangdong Zhang
Phase change materials (PCMs) are widely used in a range of energy storage applications due to high latent heat absorption and release capacities during phase change processes. There is still a lot to be done to resolve the inherent leakage, stiffness problems, and poor solar-thermal and electrical-thermal conversion capacities of PCMs to functionalize them. Here, a novel solid-solid phase change material (IGPCM) is created using block copolymerization. The IGPCM has a tunable enthalpy (from 58.16 to 99.60 J g −1 ) by adjusting the molecular weight of the PEG. The obtained IGPCM10K has high toughness (479.1 MJ/m 3 ), excellent bending and malleability. Since IGPCM10K suffers from poor thermal conductivity, photo responsiveness, and electro-thermal conversion, carbon nanotubes (CNT) can be added to our IGPCM10K in a simple way to improve these issues. The thermal conductivity of IGPCM10K-CNT-3 is improved by 55.6 % compared to IGPCM10K. The photothermal conversion efficiency is 84.9 % at 300 mW/cm 2 . The electrothermal conversion efficiency is 82.3 % at 12 A. The prepared flexible PCM composites have super toughness, high enthalpy, excellent thermal conductivity, and photo-thermal and electro-thermal conversion capabilities, which will show great potential in future applications.
研究领域:
材料科学
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能量存储
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纳米技术
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Ziqi Wang,Donghua Xing,Rui Yin,Pengfei Zhan,Chuntai Liu,Changyu Shen,Hu Liu
Flexible pressure sensors are in great demand for artificial haptic perception and human-machine interaction with the rapid artificial intelligent revolution. However, high-performance pressure sensors with high sensitivity, wide working range and good comfortability while possessing versatile functions is still a great challenge. Herein, an air-permeable and waterproof conductive cotton fabric (CF) decorated with in-situ reduced silver nanoparticles (AgCF) was prepared for pressure sensor, of which the significant contact effect between conductive fibers and interdigitated electrodes as well as adjacent fibrous skeleton endow it with ultrahigh pressure sensitivity (1134.47 kPa −1 ) and wide sensing range (0–98 kPa). Meanwhile, it also displayed fast response/recovery time (280 ms/220 ms) and long-term durability over 5000 cycles. All these sensing merits and excellent breathability and hydrophobicity make it applicable for wearable electronic devices for various human physical signal monitoring. Owing the high conductivity, the prepared AgCF demonstrated superior electrothermal properties including high electrothermal conversion efficiency (132.12 °C at only 1 V), controllable and stable continuous heating performances (1000 s). In addition, benefiting from the strong reflection from the electron-rich surface and effective attenuation inside the conductive fibrous network, its average electromagnetic interference shielding effectiveness (EMI SE) can reach up to 102.32 dB and 107.62 dB within X and K band, respectively, and the SE also showed good harsh environment durance, enabling it to be high-efficient shielding materials for various application scenarios.
研究领域:
材料科学
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电子学
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可穿戴技术
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传感器
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电磁干扰屏蔽
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电热性能
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）