首页|Engineering Ferroelectric Interlayer between Li1.3Al0.3Ti1.7(PO4)3 and Lithium Metal for Stable Solid-State Batteries Operating at Room Temperature

Engineering Ferroelectric Interlayer between Li1.3Al0.3Ti1.7(PO4)3 and Lithium Metal for Stable Solid-State Batteries Operating at Room Temperature

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The poor contact and side reactions between Li1.3Al0.3Ti1.7(PO4)3(LATP)and lithium(Li)anode cause uneven Li plating and high interfacial impendence,which greatly hinder the practical application of LATP in high-energy density solid-state Li metal batteries.In this work,a multifunctional ferroelectric BaTiO3(BTO)/poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)(P[VDF-TrFE-CTFE])composite interlayer(B-TERB)is constructed between LATP and Li metal anode,which not only suppresses the Li dendrite growth,but also improves the interfacial stability and maintains the intimate interfacial contact to significantly decrease the interfacial resistance by two orders of magnitude.The B-TERB interlayer generates a uniform electric field to induce a uniform and lateral Li deposition,and therefore avoids the side reactions between Li metal and LATP achieving excellent interface stability.As a result,the Li/LATP@B-TERB/Li symmetrical batteries can stably cycle for 1800 h at 0.2 mA cm-2 and 1000 h at 0.5 mA cm-2.The solid-state LiFePO4/LATP@B-TERB/Li full batteries also exhibit excellent cycle performance for 250 cycles at 0.5 C and room temperature.This work proposes a novel strategy to design multifunctional ferroelectric interlayer between ceramic electrolytes and Li metal to enable stable room-temperature cycling performance.

BaTiO3dendritesferroelectricLi1.3Al0.3Ti1.7(PO4)3lithium metal

Tian Gu、Likun Chen、Yanfei Huang、Jiabin Ma、Peiran Shi、Jie Biao、Ming Liu、Wei Lu、Yanbing He

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Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center,Institute of Materials Research(IMR),Tsinghua Shenzhen International Graduate School,Shenzhen 518055,China

School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

College of Materials Science and Engineering,Shenzhen University,Shenzhen 518055,China

National Natural Science Foundation of ChinaLocal Innovative Research Teams Project of Guangdong Pearl River Talents ProgramShenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research CenterShenzhen Technical Plan ProjectShenzhen Technical Plan ProjectShenzhen Technical Plan Project

U20012202017BT01N111XMHT20200203006RCJC20200714114436091JCYJ20180508152210821JCYJ20180508152135822

2023

10.1002/eem2.12531

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(6)
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