Manganese pyrophosphate polyanionic lithium battery negative electrode material and preparation method thereof
A manganese pyrophosphate poly and anionic technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of unfavorable large-scale production, high equipment requirements, high energy consumption, and achieve single-phase and crystalline The effect of good performance, high product purity and high discharge specific capacity
Image
Examples
Embodiment 1
[0039]The specific operation steps of the present embodiment are as follows: a concentration of 0.005mol / L manganese acetate ethanol solution is slowly added dropwise to a concentration of 0.0025mol / L pyrophosphoric acid ethanol solution; Stirring and reacting at a stirring speed of 60 rpm for 30 minutes; centrifuging the obtained precipitate, washing the obtained solid material with alcohol, and drying in an oven at 100° C. for 8 hours to obtain a manganese pyrophosphate polyanion lithium battery negative electrode material.
[0040] see figure 1 and figure 2 It can be seen that the manganese pyrophosphate polyanion lithium battery negative electrode material prepared in Example 1 has good single-phase and crystallinity, stable structure, and stable electrochemical performance.
[0041] see image 3 , Figure 4 and Figure 5 , the manganese pyrophosphate polyanion lithium battery negative electrode material prepared in this example has a massive structure and is composed...
Embodiment 2
[0043] The specific operation steps of this embodiment are as follows: Slowly add the manganese acetate ethanol solution with a concentration of 0.02 mol / L into the ethanol solution with a concentration of 0.01 mol / L pyrophosphoric acid. Manganese acetate and pyrophosphoric acid were reacted with stirring at a stirring speed of 60 rpm for 30 minutes at a molar ratio of 1:1. The obtained mixed solution is centrifuged, washed with alcohol, and dried in an oven to obtain a block-shaped manganese pyrophosphate polyanion lithium battery negative electrode material.
[0044] see Figure 6-8 It can be seen that the manganese pyrophosphate polyanion lithium battery negative electrode material prepared in Example 2 has good single-phase and crystallinity, stable structure, and stable electrochemical performance.
[0045] Further, the obtained massive manganese pyrophosphate polyanion lithium battery negative electrode material was dried, that is, dried at 100°C for 8 hours, and then s...
Embodiment 3
[0047] The specific operation steps of this embodiment are as follows: Slowly add the manganese acetate ethanol solution with a concentration of 0.02 mol / L into the ethanol solution with a concentration of 0.01 mol / L pyrophosphoric acid. Then add 0.14191g graphene oxide (added by 5% of the mass of the product), manganese acetate and pyrophosphoric acid in a molar ratio of 1:1, stir and react at a stirring speed of 60 rpm for 30 minutes, and carry out the mixed solution obtained centrifuging, washing with alcohol, and drying in an oven to obtain a block-shaped manganese pyrophosphate polyanion lithium battery negative electrode material.
[0048] see Figures 9 to 11 It can be seen that the manganese pyrophosphate polyanion lithium battery negative electrode material prepared in Example 3 has good single-phase and crystallinity, stable structure, and stable electrochemical performance.
[0049] Further, the obtained massive manganese pyrophosphate polyanion lithium battery neg...
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Abstract
Description
Claims
Application Information
- IPC
- C01B25/42; H01M4/58; H01M10/0525
- CPC
- C01B25/42; H01M4/5825; H01M10/0525; C01P2006/10; C01P2006/34; C01P2002/72; C01P2004/03; C01P2006/40
- Inventors
- 张佳峰; 张建永