Monocrystal lithium manganate material taking alpha-MnO2 as manganese source and preparation method thereof
A single crystal lithium manganese oxide and manganese source technology, applied in the direction of manganate/permanganate, active material electrodes, electrical components, etc., can solve the problem of uneven particle size, easy agglomeration, and affecting material uniformity and structural stability and other problems, to achieve the effect of large contact area, good electrical performance, and mass production
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Embodiment 1
[0023] Take 30mL of concentrated sulfuric acid (98%) and add it into deionized water to make a 2mol / L dilute sulfuric acid solution. Weigh 5g of potassium permanganate and slowly add it to the above dilute sulfuric acid. After stirring and reacting at 80°C for 4 hours, it is obtained by filtration. Black precipitate, wash the precipitate with water until neutral, then wash twice with ethanol; then dry at 60°C for 10h to obtain α-MnO 2 , 0.02mol α-MnO 2 After grinding with 0.0105mol LiOH in a mortar, put the mixed powder in a muffle furnace and heat it to 300°C for 3h, then at 950°C for 12h, after the calcination, cool it down to room temperature naturally, and then pulverize it and sieving to obtain a single crystal lithium manganese oxide material.
[0024] The single crystal lithium manganese oxide synthesized above was used as the active material of the positive electrode material, and it was mixed with the conductive agent acetylene black (AB) and the binder polyvinyliden...
Embodiment 2
[0031] Take 30mL of concentrated sulfuric acid (98%) and add it into deionized water to prepare a 2mol / L dilute sulfuric acid solution, weigh 5g of potassium permanganate and slowly add it to the above dilute sulfuric acid, stir and react at 70°C for 4h, and then filter to obtain Black precipitate, wash the precipitate with water until neutral, then wash twice with ethanol; then dry at 60°C for 10h to obtain α-MnO 2 , 0.02mol α-MnO 2 After grinding with 0.0105mol LiOH in a mortar, put the mixed powder in a muffle furnace and heat it to 300°C for 3h, then at 950°C for 12h, after the calcination, cool it down to room temperature naturally, and then pulverize it and sieving to obtain a single crystal lithium manganese oxide material.
[0032] The single crystal lithium manganese oxide synthesized above was used as the active material of the positive electrode material, and it was mixed with the conductive agent acetylene black (AB) and the binder polyvinylidene fluoride (PVDF) i...
Embodiment 3
[0035] Take 30mL of concentrated sulfuric acid (98%) and add it into deionized water to make a 2mol / L dilute sulfuric acid solution. Weigh 5g of potassium permanganate and slowly add it to the above dilute sulfuric acid. After stirring and reacting at 90°C for 4h, it is obtained by filtration. Black precipitate, wash the precipitate with water until neutral, then wash twice with ethanol; then dry at 60°C for 10h to obtain α-MnO 2 , 0.02mol α-MnO 2 After grinding with 0.0105mol LiOH in a mortar, put the mixed powder in a muffle furnace and heat it to 300°C for 3h, then at 950°C for 12h, after the calcination, cool it down to room temperature naturally, and then pulverize it and sieving to obtain a single crystal lithium manganese oxide material.
[0036] The single crystal lithium manganese oxide synthesized above was used as the active material of the positive electrode material, and it was mixed with the conductive agent acetylene black (AB) and the binder polyvinylidene flu...
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