{"title":"以NASICON结构提高磷酸钛锂陶瓷离子电导率的可能性","authors":"I. A. Stenina, A. V. Chernyak, A. B. Yaroslavtsev","doi":"10.1134/S0020168526700019","DOIUrl":null,"url":null,"abstract":"<p>In this work, a synthesis technique has been developed that made it possible to obtain highly conductive ceramics based on lithium–titanium phosphate of the composition Li<sub>1.2</sub>Al<sub>0.2</sub>Ge<sub>0.2</sub>Ti<sub>1.6</sub>(PO<sub>4</sub>)<sub>3</sub> with a relative density of 97% and lithium-ion conductivity up to 1.4 × 10<sup>–3</sup> S/cm at room temperature. It consisted of two successive high-temperature annealings with intermediate mechanochemical treatment of the precursor. Using impedance spectroscopy, it was shown that the value of the total lithium-ion conductivity approaches its bulk conductivity for this material. This conclusion is confirmed by NMR method with pulsed magnetic field gradient. The good sintering of the ceramics and its high density result in the suppression of grain boundary resistance, which negatively affects the conductive properties of most materials with the NASICON structure.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 7-15","pages":"327 - 334"},"PeriodicalIF":0.5000,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On the Possibility of Increasing the Ionic Conductivity of Ceramics Based on Lithium Titanium Phosphate with the NASICON Structure\",\"authors\":\"I. A. Stenina, A. V. Chernyak, A. B. Yaroslavtsev\",\"doi\":\"10.1134/S0020168526700019\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this work, a synthesis technique has been developed that made it possible to obtain highly conductive ceramics based on lithium–titanium phosphate of the composition Li<sub>1.2</sub>Al<sub>0.2</sub>Ge<sub>0.2</sub>Ti<sub>1.6</sub>(PO<sub>4</sub>)<sub>3</sub> with a relative density of 97% and lithium-ion conductivity up to 1.4 × 10<sup>–3</sup> S/cm at room temperature. It consisted of two successive high-temperature annealings with intermediate mechanochemical treatment of the precursor. Using impedance spectroscopy, it was shown that the value of the total lithium-ion conductivity approaches its bulk conductivity for this material. This conclusion is confirmed by NMR method with pulsed magnetic field gradient. The good sintering of the ceramics and its high density result in the suppression of grain boundary resistance, which negatively affects the conductive properties of most materials with the NASICON structure.</p>\",\"PeriodicalId\":585,\"journal\":{\"name\":\"Inorganic Materials\",\"volume\":\"61 7-15\",\"pages\":\"327 - 334\"},\"PeriodicalIF\":0.5000,\"publicationDate\":\"2026-05-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Inorganic Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0020168526700019\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1134/S0020168526700019","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
On the Possibility of Increasing the Ionic Conductivity of Ceramics Based on Lithium Titanium Phosphate with the NASICON Structure
In this work, a synthesis technique has been developed that made it possible to obtain highly conductive ceramics based on lithium–titanium phosphate of the composition Li1.2Al0.2Ge0.2Ti1.6(PO4)3 with a relative density of 97% and lithium-ion conductivity up to 1.4 × 10–3 S/cm at room temperature. It consisted of two successive high-temperature annealings with intermediate mechanochemical treatment of the precursor. Using impedance spectroscopy, it was shown that the value of the total lithium-ion conductivity approaches its bulk conductivity for this material. This conclusion is confirmed by NMR method with pulsed magnetic field gradient. The good sintering of the ceramics and its high density result in the suppression of grain boundary resistance, which negatively affects the conductive properties of most materials with the NASICON structure.
期刊介绍：
Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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