{"title":"用于高性能锂离子电池的富锂锰基层状氧化物保护层的原位超快转化†。","authors":"","doi":"10.1039/d4gc02349h","DOIUrl":null,"url":null,"abstract":"<div><p>Li-rich Mn-based layered oxides provide a compelling amalgamation of high theoretical capacity and cost-effectiveness, positioning them as prime contenders for next-generation lithium-ion battery cathodes. However, their vulnerability to surface instability gives rise to a host of challenges, notably severe capacity and voltage fading. Consequently, the surface modification of Li-rich Mn-based layered oxides emerges as a viable solution to tackle this issue. Nevertheless, current methods exhibit various drawbacks, encompassing time-intensive procedures, environmental unfriendliness, and challenges in scalability. Hence, we present a technique employing ultrafast high-temperature heating technology to dynamically reshape the chemistry and structure of the surface of individual single-crystal Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> cathode particles (LMLO) within a rapid 8-second timeframe. Structural analysis reveals the seamless integration of the spinel structure onto the surface, intricately linked to the internal layered structure, accompanied by a notable abundance of oxygen vacancies. Leveraging the distinctive features of this modified structure, the material demonstrates enhanced discharge capacity, superior rate performance, and prolonged cycling stability compared to the unmodified counterpart. Significantly, in stark contrast to alternative preparation methods, this technique accomplishes the formation of the protective layer within a mere 8 seconds, showcasing unparalleled efficiency. Furthermore, it boasts safety and environmental friendliness, necessitates basic instrumentation, boasts ease of operation, and is well-suited for large-scale adoption. Consequently, this method is positioned to drive the commercialization of Li-rich Mn-based layered oxide cathode materials.</p></div>","PeriodicalId":78,"journal":{"name":"Green Chemistry","volume":null,"pages":null},"PeriodicalIF":9.3000,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultrafast, in situ transformation of a protective layer on lithium-rich manganese-based layered oxides for high-performance Li-ion batteries†\",\"authors\":\"\",\"doi\":\"10.1039/d4gc02349h\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Li-rich Mn-based layered oxides provide a compelling amalgamation of high theoretical capacity and cost-effectiveness, positioning them as prime contenders for next-generation lithium-ion battery cathodes. However, their vulnerability to surface instability gives rise to a host of challenges, notably severe capacity and voltage fading. Consequently, the surface modification of Li-rich Mn-based layered oxides emerges as a viable solution to tackle this issue. Nevertheless, current methods exhibit various drawbacks, encompassing time-intensive procedures, environmental unfriendliness, and challenges in scalability. Hence, we present a technique employing ultrafast high-temperature heating technology to dynamically reshape the chemistry and structure of the surface of individual single-crystal Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> cathode particles (LMLO) within a rapid 8-second timeframe. Structural analysis reveals the seamless integration of the spinel structure onto the surface, intricately linked to the internal layered structure, accompanied by a notable abundance of oxygen vacancies. Leveraging the distinctive features of this modified structure, the material demonstrates enhanced discharge capacity, superior rate performance, and prolonged cycling stability compared to the unmodified counterpart. Significantly, in stark contrast to alternative preparation methods, this technique accomplishes the formation of the protective layer within a mere 8 seconds, showcasing unparalleled efficiency. Furthermore, it boasts safety and environmental friendliness, necessitates basic instrumentation, boasts ease of operation, and is well-suited for large-scale adoption. Consequently, this method is positioned to drive the commercialization of Li-rich Mn-based layered oxide cathode materials.</p></div>\",\"PeriodicalId\":78,\"journal\":{\"name\":\"Green Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":9.3000,\"publicationDate\":\"2024-08-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Green Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/org/science/article/pii/S1463926224007088\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Green Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/org/science/article/pii/S1463926224007088","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Ultrafast, in situ transformation of a protective layer on lithium-rich manganese-based layered oxides for high-performance Li-ion batteries†
Li-rich Mn-based layered oxides provide a compelling amalgamation of high theoretical capacity and cost-effectiveness, positioning them as prime contenders for next-generation lithium-ion battery cathodes. However, their vulnerability to surface instability gives rise to a host of challenges, notably severe capacity and voltage fading. Consequently, the surface modification of Li-rich Mn-based layered oxides emerges as a viable solution to tackle this issue. Nevertheless, current methods exhibit various drawbacks, encompassing time-intensive procedures, environmental unfriendliness, and challenges in scalability. Hence, we present a technique employing ultrafast high-temperature heating technology to dynamically reshape the chemistry and structure of the surface of individual single-crystal Li1.2Mn0.54Ni0.13Co0.13O2 cathode particles (LMLO) within a rapid 8-second timeframe. Structural analysis reveals the seamless integration of the spinel structure onto the surface, intricately linked to the internal layered structure, accompanied by a notable abundance of oxygen vacancies. Leveraging the distinctive features of this modified structure, the material demonstrates enhanced discharge capacity, superior rate performance, and prolonged cycling stability compared to the unmodified counterpart. Significantly, in stark contrast to alternative preparation methods, this technique accomplishes the formation of the protective layer within a mere 8 seconds, showcasing unparalleled efficiency. Furthermore, it boasts safety and environmental friendliness, necessitates basic instrumentation, boasts ease of operation, and is well-suited for large-scale adoption. Consequently, this method is positioned to drive the commercialization of Li-rich Mn-based layered oxide cathode materials.
期刊介绍:
Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.