Qinghui Zeng , Yu Lu , Pingping Chen , Zhenfeng Li , Xin Wen , Wen Wen , Yu Liu , Shuping Zhang , Hailei Zhao , Henghui Zhou , Zhi-xiang Wang , Liaoyun Zhang
{"title":"具有液晶的半互穿网络全固态聚合物电解质为柔性固体锂金属电池构建高效离子传输通道","authors":"Qinghui Zeng , Yu Lu , Pingping Chen , Zhenfeng Li , Xin Wen , Wen Wen , Yu Liu , Shuping Zhang , Hailei Zhao , Henghui Zhou , Zhi-xiang Wang , Liaoyun Zhang","doi":"10.1016/j.jechem.2021.09.040","DOIUrl":null,"url":null,"abstract":"<div><p>The development of the solid-state polymer electrolytes (SPEs) for Li-ion batteries (LIBs) can effectively address the hidden safety issues of commercially used liquid electrolytes. Nevertheless, the unsatisfactory room temperature ion conductivity and inferior mechanical strength for linear PEO-based SPEs are still the immense obstacles impeding the further applications of SPEs for large-scale commercialization. Herein, we fabricate a series of semi-interpenetrating-network (semi-IPN) polymer electrolytes based on a novel liquid crystal (C6M LC) and poly(ethylene glycol) diglycidyl ether (PEGDE) via UV-irradiation at the first time. The LCs not only highly improve the mechanical properties of electrolyte membranes via the construction of network structure with PEGDE, but also create stable ion transport channels for ion conduction. As a result, a free-standing flexible SPE shows outstanding ionic conductivity (5.93 × 10<sup>−5</sup> S cm<sup>−1</sup> at 30 °C), a very wide electrochemical stability window of 5.5 V, and excellent thermal stability at thermal decomposition temperatures above 360 °C as well as the capacity of suppressing lithium dendrite growth. Moreover, the LiFePO<sub>4</sub>/Li battery assembled with the semi-IPN electrolyte membranes exhibits good cycle performance and admirable reversible specific capacity. This work highlights the obvious advantages of LCs applied to the electrolyte for the advanced solid lithium battery.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":null,"pages":null},"PeriodicalIF":14.0000,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"17","resultStr":"{\"title\":\"Semi-interpenetrating-network all-solid-state polymer electrolyte with liquid crystal constructing efficient ion transport channels for flexible solid lithium-metal batteries\",\"authors\":\"Qinghui Zeng , Yu Lu , Pingping Chen , Zhenfeng Li , Xin Wen , Wen Wen , Yu Liu , Shuping Zhang , Hailei Zhao , Henghui Zhou , Zhi-xiang Wang , Liaoyun Zhang\",\"doi\":\"10.1016/j.jechem.2021.09.040\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The development of the solid-state polymer electrolytes (SPEs) for Li-ion batteries (LIBs) can effectively address the hidden safety issues of commercially used liquid electrolytes. Nevertheless, the unsatisfactory room temperature ion conductivity and inferior mechanical strength for linear PEO-based SPEs are still the immense obstacles impeding the further applications of SPEs for large-scale commercialization. Herein, we fabricate a series of semi-interpenetrating-network (semi-IPN) polymer electrolytes based on a novel liquid crystal (C6M LC) and poly(ethylene glycol) diglycidyl ether (PEGDE) via UV-irradiation at the first time. The LCs not only highly improve the mechanical properties of electrolyte membranes via the construction of network structure with PEGDE, but also create stable ion transport channels for ion conduction. As a result, a free-standing flexible SPE shows outstanding ionic conductivity (5.93 × 10<sup>−5</sup> S cm<sup>−1</sup> at 30 °C), a very wide electrochemical stability window of 5.5 V, and excellent thermal stability at thermal decomposition temperatures above 360 °C as well as the capacity of suppressing lithium dendrite growth. Moreover, the LiFePO<sub>4</sub>/Li battery assembled with the semi-IPN electrolyte membranes exhibits good cycle performance and admirable reversible specific capacity. This work highlights the obvious advantages of LCs applied to the electrolyte for the advanced solid lithium battery.</p></div>\",\"PeriodicalId\":67498,\"journal\":{\"name\":\"能源化学\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":14.0000,\"publicationDate\":\"2022-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"17\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"能源化学\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2095495621005593\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"能源化学","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2095495621005593","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 17
摘要
锂离子电池用固态聚合物电解质(spe)的开发可以有效解决商用液体电解质的安全隐患问题。然而,线性peo基spe的室温离子电导率和较差的机械强度仍然是阻碍spe进一步大规模商业化应用的巨大障碍。在此,我们首次通过紫外线照射制备了一系列基于新型液晶(C6M LC)和聚乙二醇二甘油酯(PEGDE)的半互穿网络(semi-IPN)聚合物电解质。LCs不仅通过与PEGDE构建网状结构,极大地改善了电解质膜的力学性能,而且为离子传导创造了稳定的离子传输通道。结果表明,独立柔性SPE具有优异的离子电导率(30°C时为5.93 × 10−5 S cm−1)、5.5 V的电化学稳定窗口、360°C以上热分解温度下优异的热稳定性以及抑制锂枝晶生长的能力。此外,用半ipn电解质膜组装的LiFePO4/Li电池具有良好的循环性能和良好的可逆比容量。本研究突出了lc应用于先进固体锂电池电解液的明显优势。
Semi-interpenetrating-network all-solid-state polymer electrolyte with liquid crystal constructing efficient ion transport channels for flexible solid lithium-metal batteries
The development of the solid-state polymer electrolytes (SPEs) for Li-ion batteries (LIBs) can effectively address the hidden safety issues of commercially used liquid electrolytes. Nevertheless, the unsatisfactory room temperature ion conductivity and inferior mechanical strength for linear PEO-based SPEs are still the immense obstacles impeding the further applications of SPEs for large-scale commercialization. Herein, we fabricate a series of semi-interpenetrating-network (semi-IPN) polymer electrolytes based on a novel liquid crystal (C6M LC) and poly(ethylene glycol) diglycidyl ether (PEGDE) via UV-irradiation at the first time. The LCs not only highly improve the mechanical properties of electrolyte membranes via the construction of network structure with PEGDE, but also create stable ion transport channels for ion conduction. As a result, a free-standing flexible SPE shows outstanding ionic conductivity (5.93 × 10−5 S cm−1 at 30 °C), a very wide electrochemical stability window of 5.5 V, and excellent thermal stability at thermal decomposition temperatures above 360 °C as well as the capacity of suppressing lithium dendrite growth. Moreover, the LiFePO4/Li battery assembled with the semi-IPN electrolyte membranes exhibits good cycle performance and admirable reversible specific capacity. This work highlights the obvious advantages of LCs applied to the electrolyte for the advanced solid lithium battery.