Issue 45, 2021

A scaffold membrane of solid polymer electrolytes for realizing high-stability and dendrite-free lithium-metal batteries

Abstract

High stability and uniform Li deposition are essential for realizing applications of Li-metal batteries (LMBs). Therefore, a scaffold for polymer electrolytes is designed to achieve highly stable operation and dendrite-free Li deposition. A porous membrane of poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) is synthesized as a scaffold to host a networked poly(ethylene oxide) (PEO)-based solid polymer electrolyte (NSPE) and form a scaffold-hosted electrolyte (NSPE@PF) that exhibits a considerably higher ionic conductivity and Li+-transference number at 30 °C than the reported PEO-based solid polymer electrolytes do. The PVdF-HFP scaffold renders the NSPE@PF electrochemically stable until 5.4 V (vs. Li/Li+). The PVdF-HFP membrane facilitates uniform Li deposition on both Cu- and Li-metal anodes with negligible dendrite growth in both solid-polymer and liquid electrolyte systems. LMBs containing the NSPE@PF exhibit high capacities and a high cycling stability of up to 1100 cycles. The high-dielectric feature of the PVdF-HFP scaffold facilitates counter-ion-pair dissociation and extends the stable voltage range. Its anion-tethering ability minimizes the space-charge zones on the Li-anode surface and suppresses Li-dendrite growth. Moreover, the high mechanical strength of the scaffold facilitates the synthesis of thin and practically usable NSPE@PFs. This scaffold design is promising for realizing LMB applications.

Graphical abstract: A scaffold membrane of solid polymer electrolytes for realizing high-stability and dendrite-free lithium-metal batteries

Supplementary files

Article information

Article type
Paper
Submitted
11 ኦገስ 2021
Accepted
07 ኦክቶ 2021
First published
07 ኦክቶ 2021

J. Mater. Chem. A, 2021,9, 25408-25417

A scaffold membrane of solid polymer electrolytes for realizing high-stability and dendrite-free lithium-metal batteries

H. T. T. Nguyen, D. H. Nguyen, Q. Zhang, Y. Lee, J. Jan, C. Chiu and H. Teng, J. Mater. Chem. A, 2021, 9, 25408 DOI: 10.1039/D1TA06838E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements