Supramolecular ligands enable efficient ion transport in solidstate lithium batteriesOA
The development of poly(vinylidene fluoride)-based composite solid-state electrolytes is severely hindered by slow Li^(+)transport and unstable solid-state electrolyte interphases.This study addresses these challenges by proposing a supramolecular ligand intervention strategy using 18-crown-6 as an additive.Coordination between the large-pore crown ethers and Li^(+)promotes lithium bis(fluorosulfonyl)imide dissociation and increases the free Li^(+)concentration,thereby enhancing ion transport with a high ionic conductivity and an improved Li^(+)transference number.Moreover,this coordination homogenizes the Li^(+)flux,suppressing side reactions and dendrite formation.Consequently,the modified electrolyte significantly enhances the cycling stability of LiLi cells up to 800 h with a reduced overpotential.Additionally,the LiNCM811 cells delivered 84.2%capacity retention after 2500 cycles at 10C,and retained 72.5%capacity after 780 cycles even at a high cut-off voltage of 4.5 V at 5C.Structural and interfacial characterizations confirmed the formation of a dense LiF/Li3N-rich SEI layer,which enhances mechanical strength and ionic transport.This study provides a robust modification approach using supramolecular ligands to achieve high-performance solid-state lithium-metal batteries.
Qian-Nan Zhu;Kang-Rui Ren;Jun-Yao You;Zhen-Han Xie;Hai Su;Yan-Bing He
Shenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,ChinaShenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,ChinaShenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,ChinaShenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,ChinaShenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,ChinaShenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China
信息技术与安全科学
PVDF composite solid electrolyteLi-salt dissociationcrown etherLi^(+)transportsolid-state lithium battery
《Energy Materials and Devices》 2026 (2)
P.53-61,9
supported by the National Key Research and Development Program of China(Grant No.2021YFF0500600)the National Science Fund for Distinguished Young Scholars(Grant No.52325206)the National Natural Science Foundation of China(Grant Nos.U2001220,52203298,523B2022)the Shenzhen Technical Plan Project(Grant Nos.RCJC20200714114436091,JCYJ20220530143012027,JCYJ20220818101003008,JCYJ20220818101003007)Energy Revolution S&T Program of Yulin Innovation Institute of Clean Energy(Grant No.E511060817)the Tsinghua Shenzhen International Graduate School-Shenzhen Pengrui Young Faculty Program of Shenzhen Pengrui Foundation(Grant No.SZPR2023006).
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