{"title":"微结构调制诱导高离子电导率的低成本湿空气稳定氟化物固体电解质","authors":"Xianhui Nie, Meng Lei, Jiulin Hu* and Chilin Li*, ","doi":"10.1021/acsmaterialslett.5c0002910.1021/acsmaterialslett.5c00029","DOIUrl":null,"url":null,"abstract":"<p >Among halide solid-state electrolytes (SSEs), fluorides show distinct advantages in chemical and electrochemical stability but are plagued by inadequate room-temperature (RT) ionic conductivity. Herein, we propose a cost-effective and humid air-stable fluoride SSE Li<sub>2</sub>TiF<sub>6</sub> synthesized by a simple hydrothermal method, exhibiting a high ionic conductivity of 9.69 × 10<sup>–5</sup> S/cm at RT and outstanding humidity tolerance. The enhanced ionic conductivity is demonstrated to originate from microstrain-induced crystal lattice expansion. Furthermore, a stable Li<sup>+</sup>-conductive and intimate interface between halide electrolyte and lithium metal is constructed by introducing a poly(ethylene oxide) protective layer, resulting in the symmetric cell exhibiting a long lifespan with stable cycling over 1000 h at 0.1 mA/cm<sup>2</sup> as well as the solid-state lithium metal batteries based on the LiFePO<sub>4</sub> cathode reversibly operated for at least 250 cycles at 0.5 C. This work provides fresh perspectives on resolving the cost and various stability issues encountered with halide SSEs.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 5","pages":"1768–1776 1768–1776"},"PeriodicalIF":9.6000,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Cost-Effective and Humid Air-Stable Fluoride Solid Electrolyte with High Ionic Conductivity Induced by Microstructural Modulation\",\"authors\":\"Xianhui Nie, Meng Lei, Jiulin Hu* and Chilin Li*, \",\"doi\":\"10.1021/acsmaterialslett.5c0002910.1021/acsmaterialslett.5c00029\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Among halide solid-state electrolytes (SSEs), fluorides show distinct advantages in chemical and electrochemical stability but are plagued by inadequate room-temperature (RT) ionic conductivity. Herein, we propose a cost-effective and humid air-stable fluoride SSE Li<sub>2</sub>TiF<sub>6</sub> synthesized by a simple hydrothermal method, exhibiting a high ionic conductivity of 9.69 × 10<sup>–5</sup> S/cm at RT and outstanding humidity tolerance. The enhanced ionic conductivity is demonstrated to originate from microstrain-induced crystal lattice expansion. Furthermore, a stable Li<sup>+</sup>-conductive and intimate interface between halide electrolyte and lithium metal is constructed by introducing a poly(ethylene oxide) protective layer, resulting in the symmetric cell exhibiting a long lifespan with stable cycling over 1000 h at 0.1 mA/cm<sup>2</sup> as well as the solid-state lithium metal batteries based on the LiFePO<sub>4</sub> cathode reversibly operated for at least 250 cycles at 0.5 C. This work provides fresh perspectives on resolving the cost and various stability issues encountered with halide SSEs.</p>\",\"PeriodicalId\":19,\"journal\":{\"name\":\"ACS Materials Letters\",\"volume\":\"7 5\",\"pages\":\"1768–1776 1768–1776\"},\"PeriodicalIF\":9.6000,\"publicationDate\":\"2025-04-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Materials Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsmaterialslett.5c00029\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialslett.5c00029","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Cost-Effective and Humid Air-Stable Fluoride Solid Electrolyte with High Ionic Conductivity Induced by Microstructural Modulation
Among halide solid-state electrolytes (SSEs), fluorides show distinct advantages in chemical and electrochemical stability but are plagued by inadequate room-temperature (RT) ionic conductivity. Herein, we propose a cost-effective and humid air-stable fluoride SSE Li2TiF6 synthesized by a simple hydrothermal method, exhibiting a high ionic conductivity of 9.69 × 10–5 S/cm at RT and outstanding humidity tolerance. The enhanced ionic conductivity is demonstrated to originate from microstrain-induced crystal lattice expansion. Furthermore, a stable Li+-conductive and intimate interface between halide electrolyte and lithium metal is constructed by introducing a poly(ethylene oxide) protective layer, resulting in the symmetric cell exhibiting a long lifespan with stable cycling over 1000 h at 0.1 mA/cm2 as well as the solid-state lithium metal batteries based on the LiFePO4 cathode reversibly operated for at least 250 cycles at 0.5 C. This work provides fresh perspectives on resolving the cost and various stability issues encountered with halide SSEs.
期刊介绍：
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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