Multi-element adulterated lithium manganate anode slice and its production method
A technology of doping lithium manganese oxide and positive electrode sheet, which is applied in the direction of electrode manufacturing, electrical components, battery electrodes, etc., can solve the problems of immature technology, high temperature capacity decline rate, poor cycle performance, etc., and achieve good cycle performance, The effect of high discharge efficiency and low high-temperature capacity decay rate
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Embodiment 1
[0046] The ratio of raw materials for the production of lithium manganese oxide battery positive plate is: the general formula of the chemical ratio of multi-element doped lithium manganate positive electrode active material is LiMn 1.85 Cr 0.038 al 0.014 Mg 0.029 Bi 0.002 Ti 0.007 Zr 0.01 Si 0.027 B 0.023 o 4 Use 85 parts, 8 parts of carbon nanotubes, and 5 parts of polyethylene oxide (PEO).
[0047] Weigh polyethylene oxide (PEO) and carbon nanotubes according to the ratio, add these two raw materials into a mixing tank in turn, and use distilled water as a solvent to stir evenly to prepare a positive electrode conductive adhesive.
[0048]Pour the above-mentioned positive electrode conductive glue into the mixing bucket, cover the lid of the mixing bucket, tighten the screws on the cover and start the mixer. Add the corresponding multi-component doped lithium manganate positive electrode active material at a uniform speed from the feeding hole, increase the stirrin...
Embodiment 2
[0056] The ratio of raw materials for the production of lithium manganese oxide battery positive plate is: the general formula of the chemical ratio of multi-element doped lithium manganate positive electrode active material is LiMn 1.85 Cr 0.039 Al 0.012 Mg 0.03 Bi 0.001 Ti 0.005 Zr 0.013 Si 0.03 B 0.02 o 4 Use 86.5 parts, 6.2 parts of acetylene black, and 4 parts of LA132 glue.
[0057] The production method, assembly method, and battery test standard are the same as in Example 1. After testing, the performance of the battery in all aspects is as follows:
[0058] 1. Cycle test at room temperature: 1000 cycles at room temperature, the remaining capacity is 83.6%, and the efficiency is 100% for 1000 cycles. The test chart of discharge end capacity, efficiency and cycle times is shown in Figure 3;
[0059] 2. High temperature cycle test: 100 cycles at high temperature (55°C), the remaining capacity is 79.75%, and the efficiency after 100 cycles is 99.7%.
[0060] 3. ...
Embodiment 3
[0064] The ratio of raw materials for the production of lithium manganese oxide battery positive plate is: the general formula of the chemical ratio of multi-element doped lithium manganate positive electrode active material is LiMn 1.85 Cr 0.042 Al 0.015 Mg 0.035 Bi 0.001 Ti 0.004 Zr 0.03 Si 0.04 B 0.01 o 4 Use 89 parts, 5.3 parts of acetylene black, and 3 parts of LA132 glue.
[0065] The production method, assembly method, and battery test standard are the same as in Example 1. After testing, the performance of the battery in all aspects is as follows:
[0066] 1. Cycle test at room temperature: 1000 cycles at room temperature, the remaining capacity is 87.5%, and the efficiency is 99.2% after 1000 cycles. The test chart of discharge end capacity, efficiency and cycle times is shown in Figure 5;
[0067] 2. High-temperature cycle test: 100 cycles at high temperature (55°C), the remaining capacity is 82.95%, and the efficiency is 99.8% after 100 cycles.
[0068] 3....
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