Highly elastic energy storage device based on intrinsically super-stretchable polymer lithium-ion conductor with high conductivity  

作　　者：Shi Wang Jixin He Qiange Li Yu Wang Chongyang Liu Tao Cheng Wen-Yong Lai 

机构地区：[1]State Key Laboratory of Organic Electronics and Information Displays(SKLOEID),Institute of Advanced Materials(IAM),School of Chemistry and Life Sciences,Nanjing University of Posts&Telecommunications,9 Wenyuan Road,Nanjing 210023,China [2]Frontiers Science Center for Flexible Electronics(FSCFE),MIIT Key Laboratory of Flexible Electronics(KLoFE),Northwestern Polytechnical University,Xi'an 710072,China

出　　处：《Fundamental Research》2024年第1期140-146,共7页自然科学基础研究（英文版）

基　　金：We acknowledge financial support from the National Natural Science Foundation of China(21835003,21674050,91833304,21805136 and 61904084);the National Key Basic Research Program of China(2023YFB3608904,2017YFB0404501 and 2014CB648300);the Natural Science Foundation of Jiangsu Province(BK20210601,BE2019120 and BK20190737);Program for Jiangsu Specially-Appointed Professor(RK030STP15001);the Six Talent Peaks Project of Jiangsu Province(TD-XCL-009);the 333 Project of Jiangsu Province(BRA2017402),the NUPT"1311 Project"and Scientific Foundation(NY219159,NY218164 and NY219020);the Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of China,the Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions(TJ217038);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD,YX030003);Special Fund of"Jiangsu Provincial High-level Innovative and Entrepreneurial Talents Introduction Program"(the first batch)in 2020(Doctoral Aggregation Program)(CZ030SC20016);China Postdoctoral Science Foundation(2021M691652);Jiangsu Province Postdoctoral Science Foundation(2021K323C).

摘　　要：Stretchable power sources,especially stretchable lithium-ion batteries(LIBs),have attracted increasing attention due to their enormous prospects for powering flexible/wearable electronics.Despite recent advances,it is still challenging to develop ultra-stretchable LIBs that can withstand large deformation.In particular,stretchable LIBs require an elastic electrolyte as a basic component,while the conductivity of most elastic electrolytes drops sharply during deformation,especially during large deformations.This is why highly stretchable LIBs have not yet been realized until now.As a proof of concept,a super-stretchable LIB with strain up to 1200%is created based on an intrinsically super-stretchable polymer electrolyte as the lithium-ion conductor.The super-stretchable conductive system is constructed by an effective diblock copolymerization strategy via photocuring of vinyl functionalized 2-ureido-4-pyrimidone(VFUpy),an acrylic monomer containing succinonitrile and a lithium salt,achieving high ionic conductivity(3.5×10^(-4)mS cm^(-1)at room temperature(RT))and large deformation(the strain can reach 4560%).The acrylic elastomer containing Li-ion conductive domains can strongly increase the compatibility between the neighboring elastic networks,resulting in high ionic conductivity under ultra-large deformation,while VFUpy increases elasticity modulus(over three times)and electrochemical stability(voltage window reaches 5.3 V)of the prepared polymer conductor.At a strain of up to 1200%,the resulting stretchable LIBs are still sufficient to power LEDs.This study sheds light on the design and development of high-performance intrinsically super-stretchable materials for the advancement of highly elastic energy storage devices for powering flexible/wearable electronics that can endure large deformation.

关 键 词：Stretchable electronics Flexible electronics Flexible energy storage devices Stretchable lithium-ion conductors Flexible lithium-ion batteries 

分 类 号：TM91[电气工程—电力电子与电力传动]