Method for preparing high-purity nanometer lithium manganate
A nanometer lithium manganate and potassium permanganate technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of low energy consumption, large specific capacity and low equipment requirements
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[0019] Example 1
[0020] This embodiment includes the following steps: prepare a 40mL reaction solution and place it in a hydrothermal kettle, where the reaction solution contains a mixed aqueous solution containing 0.48g potassium permanganate, 0.104g ascorbic acid, and 0.096g lithium hydroxide, and heat in the hydrothermal kettle The temperature is kept at 180°C for 5 hours. After cooling to room temperature, the lithium manganate is separated by washing and suction filtration, and then dried.
[0021] Such as figure 1 As shown, the nano-lithium manganate prepared in this embodiment is high-purity lithium manganate with a purity of about 99.6%.
[0022] Such as figure 2 As shown, the lithium manganate particles prepared in this embodiment are nano-sized particles with a size of about 50 nanometers and a uniform size distribution.
[0023] Such as image 3 with Figure 4 As shown, with different charge and discharge rates (0.1C, 0.5C, 1C and 5C), the prepared lithium manganate sa...
Example Embodiment
[0024] Example 2
[0025] This embodiment includes the following steps:
[0026] Prepare 80mL reaction solution and place it in a hydrothermal kettle. The reaction solution is a mixed aqueous solution containing 0.96g potassium permanganate, 0.208g ascorbic acid, and 0.192g lithium hydroxide. Then the hydrothermal kettle is heated to 160°C and kept for 8 hours. After cooling to room temperature, after washing and suction filtration, lithium manganate is separated and dried.
[0027] The purity of the nanometer lithium manganate prepared in this embodiment is about 99.3%.
[0028] The prepared lithium manganate samples were tested for charge and discharge performance. The charge-discharge cycle test results show that the specific capacity at 0.1C and 5C charge and discharge is about 124 and 82mAh g, respectively -1 .
Example Embodiment
[0029] Example 3
[0030] This embodiment includes the following steps:
[0031] Prepare 80mL reaction solution and place it in a hydrothermal kettle, where the reaction solution is a mixed aqueous solution containing 0.96g potassium permanganate, 0.18g ascorbic acid, and 0.192g lithium hydroxide. Then the hydrothermal kettle is heated to 200°C and kept for 4 hours. After cooling to room temperature, after washing and suction filtration, lithium manganate is separated and dried.
[0032] The purity of the nanometer lithium manganate prepared in this embodiment is about 99.1%.
[0033] The prepared lithium manganate samples were tested for charge and discharge performance. The charge-discharge cycle test results show that the specific capacity at 0.1C and 5C charge and discharge is about 120 and 73mAh g, respectively -1 .
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