A modified PVDF-HFP/PMMA crosslinked co-polymer for high-performance all-solid-state lithium metal batteries--颗粒学报PARTICUOLOGY

Wang, S., He, L., Wang, M., Guo, X., Qiu, X., Xu, S., . . . Wei, T. (2024). A modified PVDF-HFP/PMMA crosslinked co-polymer for high-performance all-solid-state lithium metal batteries. Particuology, 93, 203-210. https://doi.org/10.1016/j.partic.2024.07.002

A modified PVDF-HFP/PMMA crosslinked co-polymer for high-performance all-solid-state lithium metal batteries

Sijia Wang^a, Liang He^a, Mengting Wang^a, Xingtong Guo^a, Xiangyun Qiu^b, Shoudong Xu^c, Petr Senin^d, Ting Bian^a, Tao Wei^a *

a School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
b Power & Energy Storage System Research Center, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, 266071, China
c College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, China
d Institute of Mechanics and Power Engineering, Ogarev Mordovia State University, Saransk, 430005, Russia

10.1016/j.partic.2024.07.002

Volume 93, October 2024, Pages 203-210

Received 13 June 2024, Revised 5 July 2024, Accepted 6 July 2024, Available online 9 July 2024, Version of Record 13 July 2024.

E-mail: wt863@just.edu.cn; wt863@126.com

Highlights

• SCEs based on PVDF-HFP/PMMA matrix containing MOFs and LiTFSI were designed and synthesized.

• PMMA was firstly used in polymer-based solid-state electrolyte.

• Use of PMMA can obtain good interfacial stability and low interfacial impedance with lithium metal electrodes.

• Synergistic effect of MOFs and PMMA enables satisfying electrochemical performances.

Abstract

For all-solid-state lithium batteries (ASSLBs), polymer-blended solid composite electrolytes (SCEs) have drawn wide interest owing to their significance in improving the interfacial solid-solid contacts and inhibiting the growth of lithium dendrites. In this work, SCEs based on PVDF-HFP/PMMA matrix containing MOFs (NH₂-MIL-53(Al)) and LiTFSI were designed and synthesized employing an easy solution casting method. The synthesized samples were examined by XRD, SEM, EDS, and electrochemical tests. It was found that MPP-2 SCE not only has excellent ionic conductivity at 60 °C of 5.54 × 10⁻⁴ S cm⁻¹, but also exhibits superior interfacial compatibility in Li||Li symmetric batteries, which can constantly cycle for about 800 h at 0.1 mA cm⁻² with no short-circuiting. The assembled Li|MPP-2|LiFePO₄ cell exhibited a first discharge specific capacity of up to 157.1 mAh g⁻¹ at 60 °C and 0.2 C. This work may help to further advance the progress of ASSLBs in the future.

Graphical abstract

Keywords

NH₂-MIL-53(Al); All solid-state lithium batteries (ASSLBs); PMMA; PVDF-HFP; Solid composite electrolytes (SCEs)

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