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| Differentiating the Integrated Structure from Lithium Rich Layer Oxide by ex situ Raman Spectroscopy: an Effective Method to Predict the Activation of Li2MnO3 |
| Author Name | Affiliation | E-mail | | CHEN Dan-Dan | State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China | | | LI Guang-She | State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China | | | FAN Jian-Ming | State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China | | | LI Bao-Yun | State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China | | | ZHANG Dan | State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China | | | FENG Tao | State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China | | | LI Guo-Hua | State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China | | | LI Li-Ping | State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China | lipingli@jlu.edu.cn |
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| Abstract: The Li1.2Mn0.6Ni0.2O2 cathode was prepared by five synthesis routes:sol-gel, high temperature solid, coprecipitation, hydrothermal and solvothermal method. The analysis of Raman spectrum shows that the co-precipitation sample is solid solution structure, while the other four samples are composite structures formed at different scales. The results of electrochemical tests for as-prepared samples show obviously different performance, especially the capacity from the activation of Li2MnO3 during the first charging process (>4.5 V). The co-precipitation sample with solid solution structure shows the highest capacity from the activation of Li2MnO3. Therefore, we can establish the connection between electrochemical performance and two-phase integration modes. Different integration modes affect the activation capacity of Li2MnO3, leading to different electrochemical properties. |
| Keywords: lithium ion battery Li-rich cathode material Raman spectrosopy activation degree |
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| CHEN Dan-Dan,LI Guang-She,FAN Jian-Ming,LI Bao-Yun,ZHANG Dan,FENG Tao,LI Guo-Hua,LI Li-Ping.Differentiating the Integrated Structure from Lithium Rich Layer Oxide by ex situ Raman Spectroscopy: an Effective Method to Predict the Activation of Li2MnO3[J].Chinese Journal of Inorganic Chemistry,2018,34(4):703-711. |
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