Ultrahigh energy harvesting properties in Ag decorated potassium-sodium niobite particle-polymer composite  

作　　者：Yu Huan Tao Wei Zhenxing Wang Hengtao Shen Xiujuan Lin Shifeng Huang Xiaohui Wang 

机构地区：[1]a School of Material Science and Engineering,University of Jinan,Jinan,250022,China [2]Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan,250022,China [3]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing,100084,China

出　　处：《Journal of Materiomics》2020年第2期355-363,共9页无机材料学学报（英文）

基　　金：supported by the China Postdoctoral Science Foundation(Grant No.2017M612177);National Natural Science Foundation of China(Grant Nos.51702119,51702122);Postdoctoral Science Foundation from University of Jinan.

摘　　要：Composite-type piezoelectric nanogenerator(PENG)can potentially provide power to the flexible electronics devices by harvesting the mechanical energy.The electricity output of the PENG is not entirely excavated until now because the polarization dipoles are not sufficiently aligned during the high-voltage poling process.In this study,some Ag particles are attached on the(K_(0.4425)Na_(0.52)Li_(0.0375))(Nb_(0.86)Ta_(0.06)Sb_(0.08))O_(3)(KNN)piezoelectric particles and then they are mixed with multi-walled carbon nanotubes and polydimethylsiloxane to fabricate the PENG device.The Ag particles can reduce the optimal poling electric field from 10 kV/mm down to 5 kV/mm.The PENG device with Ag particles poled at 5 kV/mm can generate the highest open-circuit voltage of 282 V,short-circuit voltage of 32.2 mA,and maximum instantaneous power of 3.5mW under the external mechanical stress of 10 kPa without timedependent degradation(only 27.9 V and 2.6 mA for the pure KNN-based PENG poled at 10 kV/mm).These are much better than previously reported composite-type PENG.The electrical energy generated from the PENG(20mm×40 mm)can light up 40 white light emitting diodes instantaneously without any storage unit during the stomping stage.

关 键 词：Composite-type piezoelectric energy HARVESTER Lead-free piezoelectric materials Ultrahigh electrical output Low poling electric field 

分 类 号：TB33[一般工业技术—材料科学与工程]