Ngoc Hung Vu , Hong Ha Thi Vu , Ho Xuan Nang , Phan Thi Dien , Le Thi Hoa , Won Bin Im , Vu Thu Ha , Luu Anh Tuyen , Nguyen Quang Hung , Van-Duong Dao
{"title":"F掺杂对层状尖晶石Li1.2Mn0.75Ni0.25O2-zFz作为锂离子电池正极材料电化学性能的影响","authors":"Ngoc Hung Vu , Hong Ha Thi Vu , Ho Xuan Nang , Phan Thi Dien , Le Thi Hoa , Won Bin Im , Vu Thu Ha , Luu Anh Tuyen , Nguyen Quang Hung , Van-Duong Dao","doi":"10.1016/j.jelechem.2023.117575","DOIUrl":null,"url":null,"abstract":"<div><p>Herein, the conflicting roles of F doping on the electrochemical performance of layered-spinel Li<sub>1.2</sub>Mn<sub>0.75</sub>Ni<sub>0.25</sub>O<sub>2-</sub><em><sub>z</sub></em>F<em><sub>z</sub></em> (<em>z</em> = 0, 0.05, 0.1) cathode materials are studied. The compound consists of Li<sub>1.2</sub>Mn<sub>0.6</sub>Ni<sub>0.2</sub>O<sub>2</sub> and LiMn<sub>1.5</sub>Ni<sub>0.5</sub>O<sub>4</sub> with their phase ratio depending on F doping content. When <em>z</em> = 0.05, it favors the spinel phase formation, leading to increased first Coulombic efficiency and improved cycle stability. However, it reduces the cathode capacity to 250 mAh g<sup>−1</sup> at C/10 (the capacity of the pristine is 280 mAhg<sup>−1</sup>). With F doping content increasing to <em>z</em> = 0.1, the cycle stability of the cathode is the best, with 96 % capacity retention after 200 cycles at C/2. The high level of F stabilizes the structure, prevents phase transition, and retards voltage decay. The result demonstrates a promising strategy for the design of composite cathode materials by F doping.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117575"},"PeriodicalIF":4.5000,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Conflicting roles of F doping on electrochemical performance of layered-spinel Li1.2Mn0.75Ni0.25O2-zFz as cathode materials for Li-ion batteries\",\"authors\":\"Ngoc Hung Vu , Hong Ha Thi Vu , Ho Xuan Nang , Phan Thi Dien , Le Thi Hoa , Won Bin Im , Vu Thu Ha , Luu Anh Tuyen , Nguyen Quang Hung , Van-Duong Dao\",\"doi\":\"10.1016/j.jelechem.2023.117575\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Herein, the conflicting roles of F doping on the electrochemical performance of layered-spinel Li<sub>1.2</sub>Mn<sub>0.75</sub>Ni<sub>0.25</sub>O<sub>2-</sub><em><sub>z</sub></em>F<em><sub>z</sub></em> (<em>z</em> = 0, 0.05, 0.1) cathode materials are studied. The compound consists of Li<sub>1.2</sub>Mn<sub>0.6</sub>Ni<sub>0.2</sub>O<sub>2</sub> and LiMn<sub>1.5</sub>Ni<sub>0.5</sub>O<sub>4</sub> with their phase ratio depending on F doping content. When <em>z</em> = 0.05, it favors the spinel phase formation, leading to increased first Coulombic efficiency and improved cycle stability. However, it reduces the cathode capacity to 250 mAh g<sup>−1</sup> at C/10 (the capacity of the pristine is 280 mAhg<sup>−1</sup>). With F doping content increasing to <em>z</em> = 0.1, the cycle stability of the cathode is the best, with 96 % capacity retention after 200 cycles at C/2. The high level of F stabilizes the structure, prevents phase transition, and retards voltage decay. The result demonstrates a promising strategy for the design of composite cathode materials by F doping.</p></div>\",\"PeriodicalId\":50545,\"journal\":{\"name\":\"Journal of Electroanalytical Chemistry\",\"volume\":\"943 \",\"pages\":\"Article 117575\"},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2023-08-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electroanalytical Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1572665723004356\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Chemical Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electroanalytical Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1572665723004356","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Chemical Engineering","Score":null,"Total":0}
Conflicting roles of F doping on electrochemical performance of layered-spinel Li1.2Mn0.75Ni0.25O2-zFz as cathode materials for Li-ion batteries
Herein, the conflicting roles of F doping on the electrochemical performance of layered-spinel Li1.2Mn0.75Ni0.25O2-zFz (z = 0, 0.05, 0.1) cathode materials are studied. The compound consists of Li1.2Mn0.6Ni0.2O2 and LiMn1.5Ni0.5O4 with their phase ratio depending on F doping content. When z = 0.05, it favors the spinel phase formation, leading to increased first Coulombic efficiency and improved cycle stability. However, it reduces the cathode capacity to 250 mAh g−1 at C/10 (the capacity of the pristine is 280 mAhg−1). With F doping content increasing to z = 0.1, the cycle stability of the cathode is the best, with 96 % capacity retention after 200 cycles at C/2. The high level of F stabilizes the structure, prevents phase transition, and retards voltage decay. The result demonstrates a promising strategy for the design of composite cathode materials by F doping.
期刊介绍：
The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied.
Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.
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