Lignin-reinforced PVDF electrolyte for dendrite-free quasi-solid-state Li metal battery

作     者：Xin-Yang Chen Xue-Jie Gao Han-Yan Wu Yu-Long Liu Xiao-Fei Yang Run-Cang Sun Xin-Yang Chen;Xue-Jie Gao;Han-Yan Wu;Yu-Long Liu;Xiao-Fei Yang;Run-Cang Sun

作者机构：Center for Lignocellulosic Chemistry and BiomaterialsCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Division of Energy StorageDalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China School of ChemistryNortheast Normal UniversityChangchun130024China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2024年第43卷第3期

页      面：1006-1016页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0806[工学-冶金工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(No.22208039) the Basic Scientific Research Project of the Educational Department of Liaoning Province(No.LJKMZ20220878) the Dalian Science and Technology Talent Innovation Support Plan(No.2022RQ036) Dalian Polytechnic University(No.222002023044,No.6102072202) 

主　　题：Quasi-solid-state electrolyte Lignin PVDF Dendrite-free Li metal battery 

摘      要：Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinylidene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial ***,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell *** tackle these issues,a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of *** lithophilic polar groups of lignin can promote uniform deposition of Li on the *** with the improved mechanical properties can efficiently prevent Li dendrites penetration through the *** addition,more active sites provided by lignin can also enhance Li^(+)transport and lead to a faster electrochemical reaction *** from the ingenious design,Li symmetric cells with 5%lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm^(-2)/5 mAh·cm^(-2),while shortcircuiting occurs after 56 h for the counterpart(pure PVDF).Moreover,a full cell of Li/5%lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g^(-1)after 2000 cycles at 10 *** work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.