Multiphase composite layered manganese-based positive electrode material and preparation method thereof
The invention discloses a multiphase composite layered manganese-based positive electrode material, the composition of which is x (alpha-LiAlO2). (1-x) Lia MnbMcM'dO2, and the multiphase composite layered manganese-based positive electrode material comprises a two-phase composite layered struct...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a multiphase composite layered manganese-based positive electrode material, the composition of which is x (alpha-LiAlO2). (1-x) Lia MnbMcM'dO2, and the multiphase composite layered manganese-based positive electrode material comprises a two-phase composite layered structure formed by an alpha-LiAlO2 phase and a Lia MnbMcM'dO2 phase. The preparation method comprises the following steps: firstly, obtaining a precursor with a pomegranate-shaped structure through a coprecipitation-spray granulation combined technology, and then doping rare earth elements, lithiating and sintering at high temperature. According to the invention, an alpha-LiAlO2 phase and a LiaMnbMcM'dO2 phase are interactively grown to form a composite structure layered material with the alpha-LiAlO2/LiaMnbMcM'dO2 phase coexisting, so that the cycling stability and the rate capability of the LiaMnbMcM'dO2 phase can be effectively improved. The preparation method provided by the invention is simple, conditions are easy to co |
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