Charge transfer behavior of triboelectric polymers and triboelectric sensors operated under ultrahigh pressure  

作　　者：Jun Hu Zhaoqi Liu Peng Yang Siyao Qin Ning Li Wenyu Ji Zhong Lin Wang Xiangyu Chen 

机构地区：[1]Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing,China [2]School of Nanoscience and Engineering,University of Chinese Academy of Sciences,Beijing,China [3]Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education),College of Physics,Jilin University,Changchun,China [4]Georgia Institute of Technology,Atlanta,Georgia,USA

出　　处：《SusMat》2024年第6期26-40,共15页可持续发展材料(英文)

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:52322313,62174014;National Key R&D Project from Minister of Science and Technology,Grant/Award Number:2021YFA1201601;Beijing Nova program,Grant/Award Number:20230484399;Youth Innovation Promotion Association CAS,Grant/Award Number:2021165;Innovation Project of Ocean Science and Technology,Grant/Award Number:22-3-3-hygg-18-hy;State Key Laboratory of New Ceramic and Fine Processing Tsinghua University,Grant/Award Number:KFZD202202;Fundamental Research Funds for the Central Universities,Grant/Award Number:292022000337。

摘　　要：The energy generation performance of triboelectric materials under ultrahigh pressure remains to be investigated.Here,the variations in molecular structure and built-in electric field of triboelectric polymers under ultrahigh pressure have been thoroughly studied.The attenuation of built-in electric field and the escaping of triboelectric charges under ultrahigh pressure are observed in different triboelectric polymers,whereas the existence of deep traps allows the built-in electric field to be recoverable with the release of pressure.Moreover,the macromolecular conformational changes,including twisting molecular chains and crystal structure changes,can also induce the redistribution of deep traps,leading to a sudden increase in built-in electric field under specific pressure.Finally,a triboelectric sensor for ultrahigh pressure condition is fabricated with excellent cycle repeatability and a total thickness of 2 mm,which has a sensitivity of 0.07 V MPa^(−1)within a linear region of 1-100 MPa.This study offers in-depth insight into the physical understanding of charge behavior both on interface and in bulk of triboelectric materials,whereas the proposed ultrahigh pressure sensors can promote various potential applications of triboelectric sensor in extreme environments.

关 键 词：charge transfer POLYMER pressure sensor triboelectric nanogenerator ultrahigh pressure 

分 类 号：O63[理学—高分子化学]