PDOL-Based Solid Electrolyte Toward Practical Application: Opportunities and Challenges

Abstract

Polymer solid-state lithium batteries (SSLB) are regarded as a promising energy storage technology to meet growing demand due to their high energy density and safety. Ion conductivity, interface stability and battery assembly process are still the main challenges to hurdle the commercialization of SSLB. As the main component of SSLB, poly(1,3-dioxolane) (PDOL)-based solid polymer electrolytes polymerized in-situ are becoming a promising candidate solid electrolyte, for their high ion conductivity at room temperature, good battery electrochemical performances, and simple assembly process. This review analyzes opportunities and challenges of PDOL electrolytes toward practical application for polymer SSLB. The focuses include exploring the polymerization mechanism of DOL, the performance of PDOL composite electrolytes, and the application of PDOL. Furthermore, we provide a perspective on future research directions that need to be emphasized for commercialization of PDOL-based electrolytes in SSLB. The exploration of these schemes facilitates a comprehensive and profound understanding of PDOL-based polymer electrolyte and provides new research ideas to boost them toward practical application in solid-state batteries.

In situ polymerization of 1,3-dioxolane and formation of fluorine/boron-rich interfaces enabled by film-forming additives for long-life lithium metal batteries

“…In order to enhance the electrode–electrolyte contact in LMBs, in situ polymerized GPEs have been developed, with polymerized 1,3-dioxolane (PDOL) being a notable example, showing superior cycling stability when compared to conventional LEs. 24,25 PDOL-based GPEs exhibit exceptional lithium ion conductivity and impressive cycling stability when coupled with low-voltage cathode materials like LiFePO 4 . 26,27 The ring-opening polymerization of DOL can be initiated by the catalytic activity of Lewis acids such as LiPF 6 , BF 3 or Al(OTf) 3 .…”

“…24,25 PDOL-based GPEs exhibit exceptional lithium ion conductivity and impressive cycling stability when coupled with low-voltage cathode materials like LiFePO 4 . 26,27 The ring-opening polymerization of DOL can be initiated by the catalytic activity of Lewis acids such as LiPF 6 , BF 3 or Al(OTf) 3 . 28,29 However, existing research on PDOL has revealed certain limitations, including the inability of some DOL initiators to form a robust SEI and their potential to compromise the performance of the polymer matrix.…”