Method for preparing modified spinelle manganic acid lithium material and lithium secondary battery
A spinel lithium manganate, lithium secondary battery technology, applied in the field of electrochemistry, can solve problems such as capacity decay, and achieve the effects of improving compatibility, easy industrialization, and low production cost
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[0035] Example 1
[0036] Weigh LiOH·H 2 0 1Kg, and get zirconia balls by mass ratio 1.5: 1 (material weight / ball weight) and add them to the ball mill and dry them for later use after ball milling for 2h, weigh LiOH H in molar ratio 1: 1.96: 0.02: 0.02 2 O (ball milled), electrolytic manganese dioxide (EMD), titanium dioxide (TiO 2 ) and copper oxide (CuO) into the ball mill, add about 1 times the weight of zirconia balls for ball milling for 4h, then calcinate at 500°C for 5h, then continue to calcine at 800°C for 10h, naturally cool to room temperature, take out for grinding, sieve ( 300 mesh or so) to obtain preliminary material A1. Li by mole ratio 2 O-2B 2 O 3 / Preliminary material = 0.5% Weigh out LiOH·H 2 O and H 3 BO 3 Put it in a beaker, and add about 20 times the mass of methanol to dissolve it to obtain LiOH·H 2 O-H 3 BO 3 / Methanol coating solution B1. The amount of methanol added is generally based on the principle of saving and ensuring LiOH·H 2 O ...
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[0038] Example 2:
[0039] Weigh Li 2 CO 3 1Kg, and take zirconia balls in a mass ratio of 1.5:1 (material weight / ball weight) and add them to the ball mill for 2h and then dry them for later use. 2 CO 3 (Ball-milled), Electrolytic Manganese Dioxide (EMD), Chromium Oxide (Cr 2 O 3 ) and aluminum nitrate (Al(NO) 3 ) 3 ) into the ball mill, and add about 1 times the weight of zirconia balls for 4 hours, then calcined at 450 ° C for 8 hours, and then continued to sinter at 850 ° C for 8 hours, and then cooled to room temperature naturally, taken out, ground and sieved (about 300 mesh) to obtain a preliminary Material A1. According to the molar ratio C / preliminary material=0.6%, weigh an appropriate amount of polyvinyl alcohol PVA and place it in a beaker and add about 20 times of ethanol to dissolve to obtain PVA coating solution B1. The amount of ethanol added is also based on the principle of saving and ensuring the sufficient dispersion to determine. Under the condit...
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[0041] Example 3
[0042] Weigh anhydrous LiNO 3 1Kg, and take zirconia balls in a mass ratio of 1.5:1 (material weight / ball weight), add them to the ball mill for 2h, and dry them for later use. Weigh LiNO in a molar ratio of 1.05:1.94:0.01:0.04. 3 (ball milled), electrolytic manganese dioxide (EMD), gallium oxide (Ga 2 O 3 ) and magnesium hydroxide (Mg(OH) 2 ) into the ball mill, and add about 1 times the weight of zirconia balls for 4 hours, then calcined at 600 °C for 4 hours, then continued to calcine at 800 °C for 14 hours, and then cooled to room temperature naturally, taken out for grinding and sieving (about 300 mesh) to obtain a preliminary Material A1. Lithium carbonate: cobalt tetroxide in molar ratio: preliminary material=3: 2: 100 Weigh lithium carbonate and cobalt tetroxide and place them in a beaker, and add about 20 times the mass of acetone to dissolve to obtain lithium carbonate and cobalt tetroxide mixed solution B1, the added acetone The amount is al...
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