Structural and electrochemical characterization of Li[(CoNi1/2Mn1/2)x(Li1/3Mn2/3)(1−2x)]O2 solid solutions with layered lithium manganese oxides
| Autor: | Y.S. Lee, Ki Soo Park, Chi Hoon Song, Y.B. Hahn, Kee-Suk Nahm, Myung Hun Cho, Sung Jang Jin |
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| Rok vydání: | 2005 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Inorganic chemistry Spinel Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element Manganese engineering.material Electrochemistry Lithium battery chemistry Oxidation state engineering Lithium Electrical and Electronic Engineering Physical and Theoretical Chemistry Phase diagram Solid solution |
| Zdroj: | Journal of Power Sources. 146:630-635 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2005.03.167 |
| Popis: | Five compositions of Li[(CoNi1/2Mn1/2)x(Li1/3Mn2/3)(1−2x)]O2 solid solutions with layered lithium manganese oxides were designed using a triangle phase diagram and were synthesized using a sol–gel method. The phase diagram satisfied the theoretical manganese oxidation state of 4+ over the whole triangle plane of the diagram and was expressed with a design equation of Li[(CoNi1/2Mn1/2)x(Li1/3Mn2/3)(1−2x)]O2. It was found that the solid solutions were synthesized with layered structure maintaining the manganese oxidation state of 4+ and showed a one-step monotonous discharge curve shape without structural transformation to spinel during charge/discharge processes. The synthesized solid solutions delivered high discharge capacities with negligible capacity fading. |
| Databáze: | OpenAIRE |
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