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

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

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Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinyl idene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial properties.However,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell properties.To tackle these issues,a lignin-reinforced PVDF electrolyte is pro-posed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of QSSBs.The lithophilic polar groups of lignin can promote uniform deposition of Li on the electrodes.Cooperating with the improved mechanical properties can efficiently prevent Li dendrites penetration through the separator.In addition,more active sites provided by lignin can also enhance Li+transport and lead to a faster electrochemical reaction kinetic.Benefitting from the ingenious design,Li sym-metric cells with 5％lignin-PVDF quasi-solid-state elec-trolyte can operate for 900 h at a high current density/capacity of 5 mA·cm-2/5 mAh·cm-2,while short-circuiting 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 C.This work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.

Quasi-solid-state electrolyteLigninPVDFDendrite-freeLi metal battery

Xin-Yang Chen、Xue-Jie Gao、Han-Yan Wu、Yu-Long Liu、Xiao-Fei Yang、Run-Cang Sun

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Center for Lignocellulosic Chemistry and Biomaterials,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China

School of Chemistry,Northeast Normal University,Changchun 130024,China

Division of Energy Storage,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

National Natural Science Foundation of ChinaBasic Scientific Research Project of the Educational Department of Liaoning ProvinceDalian Science and Technology Talent Innovation Support PlanDalian Polytechnic UniversityDalian Polytechnic University

22208039LJKMZ202208782022RQ0362220020230446102072202

2024

10.1007/s12598-023-02444-4

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(3)
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