Vanessa Miß, Stefan Seus, Anna Marx, Elisa D. Steyer, Valeriu Mereacre, Joachim R. Binder and Bernhard Roling*,
{"title":"压力、颗粒形态、涂层和热处理对全固态电池正极活性材料有效电子导电性的影响","authors":"Vanessa Miß, Stefan Seus, Anna Marx, Elisa D. Steyer, Valeriu Mereacre, Joachim R. Binder and Bernhard Roling*, ","doi":"10.1021/acsmaterialslett.4c0259510.1021/acsmaterialslett.4c02595","DOIUrl":null,"url":null,"abstract":"<p >For modeling electrochemical processes in all-solid-state batteries, reliable values for the electronic conductivity of cathode active materials (CAM) are of the utmost importance. Published values for a specific CAM vary by typically many orders of magnitude. Therefore, we carried out a systematic study on the influence of various experimental parameters on the effective electronic conductivity of CAM pellets. These parameters are applied stack pressure, Ni content of CAM, CAM particle morphology, particle coating, and heat treatment. Pellets of fully lithiated and uncoated Ni-rich NMC particles reach effective electronic conductivities σ<sub><i>eon</i></sub><sup><i>eff</i></sup> in the range of 10<sup>–1</sup> S/cm at high pressures and 10<sup>–2</sup> S/cm at low pressures. Particle coating by LiNbO<sub>3</sub> lowers σ<sub><i>eon</i></sub><sup><i>eff</i></sup> by half an order to 1 order of magnitude. While heat treatment at 900 °C is capable of removing surface impurities on the CAM particle, it also leads to increased Li/Ni disorder in the bulk of the particles.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 6","pages":"2262–2269 2262–2269"},"PeriodicalIF":8.7000,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialslett.4c02595","citationCount":"0","resultStr":"{\"title\":\"Influence of Pressure, Particle Morphology, Coating, and Heat Treatment on the Effective Electronic Conductivity of Cathode Active Materials for All-Solid-State Batteries\",\"authors\":\"Vanessa Miß, Stefan Seus, Anna Marx, Elisa D. Steyer, Valeriu Mereacre, Joachim R. Binder and Bernhard Roling*, \",\"doi\":\"10.1021/acsmaterialslett.4c0259510.1021/acsmaterialslett.4c02595\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >For modeling electrochemical processes in all-solid-state batteries, reliable values for the electronic conductivity of cathode active materials (CAM) are of the utmost importance. Published values for a specific CAM vary by typically many orders of magnitude. Therefore, we carried out a systematic study on the influence of various experimental parameters on the effective electronic conductivity of CAM pellets. These parameters are applied stack pressure, Ni content of CAM, CAM particle morphology, particle coating, and heat treatment. Pellets of fully lithiated and uncoated Ni-rich NMC particles reach effective electronic conductivities σ<sub><i>eon</i></sub><sup><i>eff</i></sup> in the range of 10<sup>–1</sup> S/cm at high pressures and 10<sup>–2</sup> S/cm at low pressures. Particle coating by LiNbO<sub>3</sub> lowers σ<sub><i>eon</i></sub><sup><i>eff</i></sup> by half an order to 1 order of magnitude. While heat treatment at 900 °C is capable of removing surface impurities on the CAM particle, it also leads to increased Li/Ni disorder in the bulk of the particles.</p>\",\"PeriodicalId\":19,\"journal\":{\"name\":\"ACS Materials Letters\",\"volume\":\"7 6\",\"pages\":\"2262–2269 2262–2269\"},\"PeriodicalIF\":8.7000,\"publicationDate\":\"2025-05-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialslett.4c02595\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Materials Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsmaterialslett.4c02595\",\"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.4c02595","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Influence of Pressure, Particle Morphology, Coating, and Heat Treatment on the Effective Electronic Conductivity of Cathode Active Materials for All-Solid-State Batteries
For modeling electrochemical processes in all-solid-state batteries, reliable values for the electronic conductivity of cathode active materials (CAM) are of the utmost importance. Published values for a specific CAM vary by typically many orders of magnitude. Therefore, we carried out a systematic study on the influence of various experimental parameters on the effective electronic conductivity of CAM pellets. These parameters are applied stack pressure, Ni content of CAM, CAM particle morphology, particle coating, and heat treatment. Pellets of fully lithiated and uncoated Ni-rich NMC particles reach effective electronic conductivities σeoneff in the range of 10–1 S/cm at high pressures and 10–2 S/cm at low pressures. Particle coating by LiNbO3 lowers σeoneff by half an order to 1 order of magnitude. While heat treatment at 900 °C is capable of removing surface impurities on the CAM particle, it also leads to increased Li/Ni disorder in the bulk of the particles.
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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