Superelastic wood-based nanogenerators magnifying the piezoelectric effect for sustainable energy conversion  

作　　者：Tong Wu Yun Lu Xinglin Tao Pan Chen Yongyue Zhang Bohua Ren Feifan Xie Xia Yu Xinyi Zhou Dongjiang Yang Jin Sun Xiangyu Chen 

机构地区：[1]State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Institute of Marine Biobased Materials,Qingdao University,Qingdao,China [2]Beijing Key Laboratory of Micro-Nano Energy and Sensor, CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences,Bejing,China [3]Research Institute of Wood Industry, Chinese Academy of Forestry,Beijing.China [4]Beijing Engineering Research Centre of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology,Beijing,China

出　　处：《Carbon Energy》2024年第11期141-154,共14页碳能源(英文)

基　　金：This work is supported by the National NaturalScience Foundation of China for Excellent YongScholar(Grant No.32122058,52322313);NationalNatural Science Foundation of China(Grant No.32371797);Natural Science Foundation of ShandongProvince(ZR2023ME098);State Key Laboratoryof Bio-Fibers and Eco-Textiles(Qingdao University,ZKT26)

摘　　要：In the quest for sustainable energy materials,wood is discovered to be a potential piezoelectric material.However,the rigidity,poor stability,and low piezoelectric properties of wood impede its development.Here,we obtained a superelastic roasted wood nanogenerator(RW-NG)by unraveling ray tissues through a sustainable roasting strategy.The increased compressibility of roasted wood intensifies the deformation of cellulose microfibrils,significantly enhancing the piezoelectric effect in wood.Roasted wood(15×15×15 mm^(3),longitudinal×radial×tangential)can generate a voltage and current outputs of 1.4 V and 14.5 nA,respectively,which are more than 70 times that of natural wood.The wood sample can recover 90%of its shape after 5000 compressions at 65%strain,exhibiting excellent elasticity and stability.Importantly,roasted wood does not add any toxic substances and can be safely applied on the human skin as a self-powered sensor for detecting body movements.Moreover,it can also be assembled into self-powered wooden floors for energy harvesting.These indicate that roasted wood has great potential for sustainable sensing and energy conversion.

关 键 词：energy conversion PIEZOELECTRIC ray tissues roasted wood SUSTAINABLE 

分 类 号：TS6[轻工技术与工程]