Construction of flexible asymmetric composite polymer electrolytes for high-voltage lithium metal batteries with superior performance

Chai, Yan1; Ning, De2; Zhou, Dong3; Gao, Jiansheng1; Ni, Jialun1; Zhang, Gaoyuan1; Gao, Rui1; Wu, Wei2; Wang, Jun4; Li, Yongli1

2024-11-01

10.1016/j.nanoen.2024.110160

NANO ENERGY   影响因子和分区

2211-2855

2211-3282

The primary obstacle hindering the application of composite solid electrolytes lies in the varying demands posed by the Li metal anode and the cathode, which needs to be capable of suppressing dendrite growth and resisting high voltage simultaneously. In this work, a new asymmetric composite solid-state electrolyte prepared via electrospinning and in-situ polymerization is proposed to address these shortcomings. In this bilayer architecture, polyacrylonitrile (PAN) layer of high-voltage tolerance, polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) layer of robust mechanical strength and good compatibility towards Li-anode are constructed, and metal-organic-frameworks (MOFs) are pre-embedded within both layers. The unique design provides a wide electrochemical stability window meanwhile ensures uniform lithium deposition. Remarkably, it exhibits a superior lithium utilization of 41 mAh cm- 2 using a lean polymer electrolyte precursor and a high critical current density of 2.2 mA cm- 2 with a thickness of 40 mu m. Beneficial from the formation of a self-adjustable gradient solid electrolyte interphase in the Li/PVDF-HFP interface, the asymmetric electrolyte endows Li||Li and Li|| NCM811 cells with excellent cycling stability. Moreover, the solid-state pouch cell exhibits reliable operation under extreme conditions. This work provides inspiration for the design and fabrication of composite solid electrolytes for next-generation high-voltage Li metal batteries.

Lithium metal batteries Asymmetric composite solid electrolyte Electrospinning technique In-situ polymerization Lithium utilization

SCI ; EI

英语

通讯

National Natural Science Foundation of China[52202331] ; Guangdong Province Major Talent Introducing Program[2021QN020687] ; Shenzhen Science and Technology Program[JCYJ20230807140818040]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:001301122200001

ELSEVIER

Web of Science

1.North China Elect Power Univ, Inst Clean Energy Technol, Beijing 102206, Peoples R China
2.Chinese Acad Sci, Shenzhen Inst Adv Technol, Ctr Photon Informat & Energy Mat, Shenzhen 518055, Peoples R China
3.Sun Yat Sen Univ, Sch Adv Energy, Shenzhen Campus, Shenzhen 518107, Peoples R China
4.Southern Univ Sci & Technol, Sch Innovat & Entrepreneurship, Shenzhen 518055, Peoples R China

Chai, Yan,Ning, De,Zhou, Dong,et al. Construction of flexible asymmetric composite polymer electrolytes for high-voltage lithium metal batteries with superior performance[J]. NANO ENERGY,2024,130.

Chai, Yan.,Ning, De.,Zhou, Dong.,Gao, Jiansheng.,Ni, Jialun.,...&Li, Yongli.(2024).Construction of flexible asymmetric composite polymer electrolytes for high-voltage lithium metal batteries with superior performance.NANO ENERGY,130.

Chai, Yan,et al."Construction of flexible asymmetric composite polymer electrolytes for high-voltage lithium metal batteries with superior performance".NANO ENERGY 130(2024).