Energy Mater 2023;3:[Accepted].10.20517/energymater.2022.83© The Author(s) 2023 Accepted Manuscript
Open AccessArticle
Polyurethane/Li10GeP2S12 composite electrolyte with high ions transfer number and ions capture for all-solid-state lithium batteries
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Peng Cui, Chun Sun, Wei Wei
Correspondence Address: Prof. Wei Wei, College of Electronic and Optical Engineering, Nanjing University of Posts&Telecommunications, 9 Wenyuan Road, Nanjing 210023, Jiangsu, China. E-mail: weiwei@njupt.edu.cn
Received: 25 Nov 2022 | First Decision: 7 Feb 2023 | Revised: 28 Feb 2023 | Accepted: 15 Mar 2023
Abstract
Polymer/ceramic composite electrolytes have recently received a lot of attention because they combine the advantages of inorganic ceramic's high ionic conductivity and the inherent elasticity of polymer constituents. Nonetheless, the interaction between the ceramic particles and the polar functional groups on the polymer molecules would affect the ion transport rate, which is an important factor to consider when developing a polymer/ceramic composite electrolyte. We present a composite elastic electrolyte based on polyurethane (PU) with high ionic conductivity of 10–3 S/cm and excellent mechanical properties (stress-strain) of 4.5 MPa by incorporating ceramic particles into the ion conduction chains on PU. This method improves the interaction between PU/LGPS and Li+ ions and the conduction of Li+ ions at the bi-phase interface, yielding a high Li+ transfer number of 0.56. After 2000 cycles, the capacity retention rates of the batteries assembled by [LFP∣(PU-LGPS)/Li+∣Li] are 95.7% (0.2 C) and 87.8% (5 C), respectively. The Li symmetric battery test demonstrates the PU/LGPS composite electrolyte's high stability over 50 days. The current study presents a novel approach to develop high-performance ceramic/polymer composite electrolytes.Keywords
Polymer/ceramic composite electrolytes, ions transfer numberCite This Article
Cui P, Sun C, Wei W. Polyurethane/Li10GeP2S12 composite electrolyte with high ions transfer number and ions capture for all-solid-state lithium batteries. Energy Mater 2023;3:[Accept]. http://dx.doi.org/10.20517/energymater.2022.83