Lithium manganate and preparation method and application thereof
A technology of lithium manganate and manganese metal, which is applied in the field of materials, can solve the problems of low capacity of lithium manganate, poor cycle performance, and a large amount of ammonia-containing wastewater, and achieve the effect of improving gram capacity and cycle stability
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Embodiment 1
[0028] Add sodium chloride into the reactor to prepare an aqueous sodium chloride solution with a conductivity of 2000uS / cm. Manganese powder, tantalum powder, and aluminum powder are mixed in a molar ratio of 1:0.001:0.003, and the resulting metal mixture, nitric acid, and high-purity water are simultaneously added to the above reactor in a molar ratio of 10:2:2 to carry out chemical corrosion crystallization reaction, Under normal pressure conditions, the ORP value of the reaction system is controlled at -400mv, the concentration of complexing agent is controlled at 5g / L, the conductivity is controlled at 2000uS / cm, and the stirring input power is controlled at 0.4kw / m 3 h, the metal ion concentration is controlled at 16g / L, the pH value is controlled at 10.5, and the reaction temperature is controlled at 50°C. In order to control the shape of the material, 5L / h nitrogen is introduced to control oxidation, and the material stays in the reactor for corrosion crystallization re...
Embodiment 2
[0032] Add sodium sulfate into the reactor to prepare an aqueous sodium sulfate solution with a conductivity of 200uS / cm. Manganese powder, tantalum powder, and titanium powder are mixed in a molar ratio of 1:0.001:0.003, and the resulting metal mixture, oxygen, and high-purity water are simultaneously added to the above reactor in a molar ratio of 10:2:2 to carry out chemical corrosion crystallization reaction, At the same time, 50g / L ammonium sulfate was added, and under normal pressure conditions, the ORP value of the reaction system was controlled at -100mv, the conductivity was controlled at 200uS / cm, and the stirring input power was controlled at 0.4kw / m 3 h, the metal ion concentration is controlled at 16g / L, the pH value is controlled at 10.5, and the reaction temperature is controlled at 30°C. In order to control the shape of the material, 5L / h nitrogen is introduced to control oxidation, and the material stays in the reactor for corrosion crystallization reaction The...
Embodiment 3
[0036] Add sodium nitrate into the reactor to prepare an aqueous sodium nitrate solution with a conductivity of 1000uS / cm. Manganese powder, tantalum powder, and niobium powder are mixed in a molar ratio of 1:0.001:0.003, and the resulting metal mixture, nitric acid, and high-purity water are simultaneously added to the above reactor in a molar ratio of 10:2:2 to carry out chemical corrosion crystallization reaction, At the same time, 5g / L ammonium sulfate was added, and under normal pressure conditions, the ORP value of the reaction system was controlled at -100mv, the concentration of complexing agent was controlled at 15g / L, the conductivity was controlled at 1000uS / cm, and the stirring input power Controlled at 0.4kw / m 3 h, the concentration of metal ions is controlled at 16g / L, the pH value is controlled at 10.5, and the reaction temperature is controlled at 30°C. In order to control the shape of the material, 5L / h nitrogen gas is introduced to control oxidation, and the ...
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