Guan Qingbao, Lu Xiao, Chen Yuyao, Zhang Haiyang, Zheng Yaxuan, Neisiany Rasoul Esmaeely, You Zhengwei
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Research Base of Textile Materials for Flexible Electronics and Biomedical Applications (China Textile Engineering Society), Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, Donghua University, 2999 North Renmin Road, Shanghai, 201620, P. R. China.
State Key Laboratory of Molecular Engineering of Polymers (Fudan University), Shanghai, 200433, China.
Adv Mater. 2022 Aug;34(34):e2204543. doi: 10.1002/adma.202204543. Epub 2022 Jul 27.
Flammability is a great challenge in the fields of electronics. The emergence of triboelectric nanogenerators (TENGs) provides a safe way to harvest environmentalally friendly energy and convert it into more secure power sources. Especially, polymer-based TENGs significantly accelerate the practical application of self-powered flexible electronics. However, most of the existing polymeric materials for TENGs are easily flammable and melt, dripping, in a fire scenario, and cannot be reused after combustion, which greatly limits the application of TENGs under extreme conditions. Herein, a fire-resistant TENG based on all-aromatic liquid crystalline poly(aryl ether ester) (LCP ) synthesized via simple and efficient one-pot melt polycondensation is reported. The highly rigid main chain of LCP endows the LCP-TENG with outstanding anti-dripping, temperature- and fire-resistance. The resultant LCP-TENG exhibits excellent electrical output performance, which is attributed to the high dielectric constant (ε' = 4.8) and fibrous-structured morphology of LCP . The device can maintain over 65% of open-circuit voltage even after 16 s combustion (≈520 °C). Consequently, this work offers a novel strategy for tailoring the TENGs toward a secure power generator and electronics with fire hazard reduction, and potential application in firefighting, personal protection, and other extreme temperature environments.
易燃性是电子领域面临的巨大挑战。摩擦纳米发电机（TENGs）的出现为收集环境友好型能源并将其转化为更安全的电源提供了一种安全途径。特别是，基于聚合物的TENGs显著加速了自供电柔性电子器件的实际应用。然而，现有的大多数用于TENGs的聚合物材料在火灾情况下容易燃烧、熔化和滴落，燃烧后无法重复使用，这极大地限制了TENGs在极端条件下的应用。在此，报道了一种通过简单高效的一锅法熔融缩聚合成的基于全芳香族液晶聚（芳醚酯）（LCP）的耐火TENG。LCP的高度刚性主链赋予LCP-TENG出色的抗滴落、耐高温和耐火性能。所得的LCP-TENG表现出优异的电输出性能，这归因于LCP的高介电常数（ε' = 4.8）和纤维状结构形态。即使在燃烧16秒（约520°C）后，该器件仍能保持超过65%的开路电压。因此，这项工作为将TENGs定制为安全的发电机和降低火灾风险的电子器件提供了一种新策略，并在消防、个人防护和其他极端温度环境中具有潜在应用。
