Yi-Chao Wang , Liang Wen , Zhi-Wei Liu , Peng Xu , Si-Lai Zheng , Ming-Guang Liu , Ji-Zhou Kong , Qian-Zhi Wang , Hong-Yu Wei , Fei Zhou , Kostya Ken Ostrikov
{"title":"通过聚阴离子TiP2O7涂层改善LiNi0.8Co0.1Mn0.1O2阴极的电化学性能","authors":"Yi-Chao Wang , Liang Wen , Zhi-Wei Liu , Peng Xu , Si-Lai Zheng , Ming-Guang Liu , Ji-Zhou Kong , Qian-Zhi Wang , Hong-Yu Wei , Fei Zhou , Kostya Ken Ostrikov","doi":"10.1016/j.jelechem.2023.117710","DOIUrl":null,"url":null,"abstract":"<div><p>Safety issues of common rechargeable Li-ion batteries (LIB) necessitate urgent development of alternative high-performance electrode materials. Lithiated nickel-rich oxides (LiNi<sub>1-x-y</sub>Mn<sub>x</sub>Co<sub>y</sub>O<sub>2</sub>) are promising LIB cathode materials, but they suffer from structural instabilities causing major capacity loss. To address this issue, here we use a robust ethanol-based wet coating process to coat a LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> LIB cathode material with polyanionic compound TiP<sub>2</sub>O<sub>7.</sub> The coating layer does not affect the phase structure of LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> and ensures a remarkable electrochemical performance, evidenced by the high initial Coulombic efficiency, durable cyclic stability, and excellent rate performance. The mechanisms leading to the achieved improvements are related to the effects of the coating layer which improved the Li<sup>+</sup> diffusion capability and the electrochemical polarization. The TiP<sub>2</sub>O<sub>7</sub> layer protects the electrode from the electrolyte by suppressing side reactions such as HF acidic attack and the associated dissolution of transition metal ion. Moreover, the unique three-dimensional (XO<sub>n</sub>)<sup>m-</sup> framework of the TiP<sub>2</sub>O<sub>7</sub> polyanion provides plentiful accommodation sites and channels for the Li-ions diffusion. The demonstrated approach opens new avenues for practical applications of electrochemically active coatings in diverse energy storage devices and systems.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117710"},"PeriodicalIF":4.5000,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improving electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode via polyanionic TiP2O7 coating\",\"authors\":\"Yi-Chao Wang , Liang Wen , Zhi-Wei Liu , Peng Xu , Si-Lai Zheng , Ming-Guang Liu , Ji-Zhou Kong , Qian-Zhi Wang , Hong-Yu Wei , Fei Zhou , Kostya Ken Ostrikov\",\"doi\":\"10.1016/j.jelechem.2023.117710\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Safety issues of common rechargeable Li-ion batteries (LIB) necessitate urgent development of alternative high-performance electrode materials. Lithiated nickel-rich oxides (LiNi<sub>1-x-y</sub>Mn<sub>x</sub>Co<sub>y</sub>O<sub>2</sub>) are promising LIB cathode materials, but they suffer from structural instabilities causing major capacity loss. To address this issue, here we use a robust ethanol-based wet coating process to coat a LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> LIB cathode material with polyanionic compound TiP<sub>2</sub>O<sub>7.</sub> The coating layer does not affect the phase structure of LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> and ensures a remarkable electrochemical performance, evidenced by the high initial Coulombic efficiency, durable cyclic stability, and excellent rate performance. The mechanisms leading to the achieved improvements are related to the effects of the coating layer which improved the Li<sup>+</sup> diffusion capability and the electrochemical polarization. The TiP<sub>2</sub>O<sub>7</sub> layer protects the electrode from the electrolyte by suppressing side reactions such as HF acidic attack and the associated dissolution of transition metal ion. Moreover, the unique three-dimensional (XO<sub>n</sub>)<sup>m-</sup> framework of the TiP<sub>2</sub>O<sub>7</sub> polyanion provides plentiful accommodation sites and channels for the Li-ions diffusion. The demonstrated approach opens new avenues for practical applications of electrochemically active coatings in diverse energy storage devices and systems.</p></div>\",\"PeriodicalId\":50545,\"journal\":{\"name\":\"Journal of Electroanalytical Chemistry\",\"volume\":\"946 \",\"pages\":\"Article 117710\"},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2023-08-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electroanalytical Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1572665723005702\",\"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/S1572665723005702","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Chemical Engineering","Score":null,"Total":0}
Improving electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode via polyanionic TiP2O7 coating
Safety issues of common rechargeable Li-ion batteries (LIB) necessitate urgent development of alternative high-performance electrode materials. Lithiated nickel-rich oxides (LiNi1-x-yMnxCoyO2) are promising LIB cathode materials, but they suffer from structural instabilities causing major capacity loss. To address this issue, here we use a robust ethanol-based wet coating process to coat a LiNi0.8Co0.1Mn0.1O2 LIB cathode material with polyanionic compound TiP2O7. The coating layer does not affect the phase structure of LiNi0.8Co0.1Mn0.1O2 and ensures a remarkable electrochemical performance, evidenced by the high initial Coulombic efficiency, durable cyclic stability, and excellent rate performance. The mechanisms leading to the achieved improvements are related to the effects of the coating layer which improved the Li+ diffusion capability and the electrochemical polarization. The TiP2O7 layer protects the electrode from the electrolyte by suppressing side reactions such as HF acidic attack and the associated dissolution of transition metal ion. Moreover, the unique three-dimensional (XOn)m- framework of the TiP2O7 polyanion provides plentiful accommodation sites and channels for the Li-ions diffusion. The demonstrated approach opens new avenues for practical applications of electrochemically active coatings in diverse energy storage devices and systems.
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.