JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Xuewen Zheng,Xingyi Dai,Jing Ge,Xiaoyu Yang,Ping Yang,Yiyu Feng,Long-Biao Huang,Wei Feng
Self-regulating heating and self-powered flexibility are pivotal for future wearable devices. However, the low energy-conversion rate of wearable devices at low temperatures limits their application in plateaus and other environments. This study introduces an azopolymer with remarkable semicrystallinity and reversible photoinduced solid-liquid transition ability that is obtained through copolymerization of azobenzene (Azo) monomers and styrene. A composite of one such copolymer with an Azo: styrene molar ratio of 9:1 (copolymer is denoted as PAzo 9:1 - co -polystyrene (PS)) and nylon fabrics (NFs) is prepared (composite is denoted as PAzo 9:1 - co -PS@NF). PAzo 9:1 - co -PS@NF exhibits hydrophobicity and high wear resistance. Moreover, it shows good responsiveness (0.624 s −1 ) during isomerization under solid ultraviolet (UV) light (365 nm) with an energy density of 70.6 kJ kg −1 . In addition, the open-circuit voltage, short-circuit current and quantity values of PAzo 9:1 - co- PS@NF exhibit small variations in a temperature range of -20 °C to 25 °C and remain at 170 V, 5 μA, and 62 nC, respectively. Notably, the involved NFs were cut and sewn into gloves to be worn on a human hand model. When the model was exposed to both UV radiation and friction, the temperature of the finger coated with PAzo 9:1 - co -PS was approximately 6.0°C higher than that of the other parts. Therefore, developing triboelectric nanogenerators based on the in situ photothermal cycles of Azo in wearable devices is important to develop low-temperature self-regulating heating and self-powered flexible devices for extreme environments.
研究领域:
材料科学
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纳米技术
·
可穿戴技术
·
光伏技术
·
热电技术
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Yuang Zhang,Chuanxin Yang,Rongwen Lu,Shufen Zhang,Bingtao Tang
Thermoelectric technology can generate thermoelectric electromotive force under the condition of temperature difference, which have unlimited prospects in the emerging fields of sensing, wearable electronic devices, self-powered arbitrary doors, electronic skin. These application scenarios also put forward higher requirements for thermoelectric devices, excellent flexibility and self-supporting characteristics. Herein, a novel flexible self-supported thermoelectric device based on carbon nanotubes (CNTs) was designed and constructed with simple laminated construction of electrical series and thermal parallel. CNTs/PEDOT:PSS and polyethylenimine (PEI)-doped CNTs/polyvinylidene fluoride (PVDF) flexible self-supported films were used as p- and n-type films respectively. The obtained flexible self-supported thermoelectric device can generate a voltage of 3.31 mV under temperature difference of 35 K. The excellent light absorption and photothermal conversion of CNTs, together with the thermoelectric characteristics of CNTs and PEDOT:PSS, enables its promising applications in self-powered light intensity detection. Furthermore, its excellent flexibility and self-supporting characteristics give it outstanding durability.
研究领域:
热电技术
·
可穿戴电子
·
传感技术
·
能量转换
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·781-786
·
IF 0.605
Gao Peng,Chen Lilin,Wu Bo,Zhang Qiming,Xue Chao,Hou Chengyi,Sun Qiang
An optimal structure design of the lattice mismatched GaInP/GaInAs/Ge solar cell with high photoelectric conversion efficiency was proposed. Two-dimensional Bi 2 Te 3 and Sb 2 Te 3 nanosheets were prepared by solvothermal synthesis method used as thermoelectric (TE) functional materials, which is further hybrid with high conductive reduced graphene oxide (rGO) and carbon nanotubes (CNTs). TE film was then fabricated based on above materials. The power factor of the n -type TE film is 19.31 μW/mK 2 , and the power factor of the p -type TE film is 97.40 μW /mK 2 . The flexible TE device was integrated with flexible solar cell. Compared with the single photovoltaic (PV) cell, the efficiency of the as-prepared flexible integrated device measured under the AM1.5 illumination is significantly improved. The efficiency of the two parallel tests is increased from 27.26% and 26.59%, to 29.11% and 28.92%, respectively. The increasing ratio reaches 6.7%–8.8%.
研究领域:
可再生能源
·
材料科学
·
热电技术
·
光伏技术
·
纳米科技
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Wang Jinpei,Song Yuxin,Yu Fanfei,Zeng Yijun,Wu Chenyang,Qin Xuezhi,Peng Liang,Li Yitan,Zhou Yongsen,Tao Ran,Liu Hangchen,Zhu Hong,Sun Ming,Xu Wanghuai,Zhang Chao,Wang Zuankai
Body heat, a clean and ubiquitous energy source, is promising as a renewable resource to supply wearable electronics. Emerging tough thermogalvanic device could be a sustainable platform to convert body heat energy into electricity for powering wearable electronics if its Carnot-relative efficiency ( η r ) reaches ~5%. However, maximizing both the η r and mechanical strength of the device are mutually exclusive. Here, we develop a rational strategy to construct a flexible thermogalvanic armor (FTGA) with a η r over 8% near room temperature, yet preserving mechanical robustness. The key to our design lies in simultaneously realizing the thermosensitive-crystallization and salting-out effect in the elaborately designed ion-transport highway to boost η r and improve mechanical strength. The FTGA achieves an ultrahigh η r of 8.53%, coupling with impressive mechanical toughness of 70.65 MJ m −3 and substantial elongation (~900%) together. Our strategy holds sustainable potential for harvesting body heat and powering wearable electronics without recharging.
研究领域:
材料科学
·
可穿戴电子设备
·
能源转换
·
热电技术
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2015
·
IF 5.613
Zhisong Lu,Huihui Zhang,Cuiping Mao,Chang Ming Li
The development of flexible thermoelectric (TE) power generators for harvesting energy from the human body has attracted significant interest in recent years. However, thus far, a wearable TE power generator based on commercially available fabrics has not been realized. In this study, nanostructured Bi 2 Te 3 and Sb 2 Te 3 were synthesized and deposited on both sides of a silk fabric to form TE columns. These TE columns were connected with silver foils to fabricate a prototype integrating an array of 12 thermocouples. The generator could effectively convert thermal energy into electricity in the temperature difference (Δ T ) range of 5–35 K. The maximum voltage and power outputs were ∼10 mV and ∼15 nW, respectively, with no significant change in both, during 100 cycles of bending and twisting. Different voltage output profiles were collected from an arm-attached generator before and after 30 min of walking, to highlight the immense potential of the silk fabric-based TE generator. This study provides a new approach for developing fabric-based TE power generators for practical applications in wearable electronics.
研究领域:
材料科学
·
能量收集
·
可穿戴电子
·
热电技术
·
柔性电子
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）