Method for modifying carbon fluoride positive electrode material by using chromium oxide or chromium oxide compound
A technology of chromium oxide and positive electrode materials, applied in the direction of positive electrodes, active material electrodes, battery electrodes, etc., can solve the problems of complicated steps in the modification of carbon fluoride positive electrode materials, restrictions on the development of lithium fluoride carbon batteries, voltage delays, etc.
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Embodiment 1
[0047] a Cr 2 o 5 The preparation method of the carbon fluoride cathode material modified by @C comprises the following steps:
[0048] (1) CrO 3 and modified fluorocarbons were added to absolute ethanol, and high-energy ball milling was carried out at a speed of 3000r / min to form a mixed slurry; wherein, CrO in the mixed slurry 3 The mass concentration is 25%, fluorinated carbon and CrO 3 The mass ratio of = 1:0.1;
[0049] (2) Dry the mixed slurry at 70°C for 8 hours and pass through a 100-mesh sieve to obtain a mixed powder;
[0050] (3) Place the mixed powder in an air atmosphere furnace and heat up to 196°C to obtain a molten mixture;
[0051] (4) Stir the molten mixture for 2h, so that the modified fluorocarbon and molten CrO 3 Mix well, continue to heat up to 350°C at a rate of 3°C / min, keep warm for 48 hours, take out, cool, grind, and pass through a 100-mesh sieve to obtain Cr 2 o 5 @C modified carbon fluoride cathode material;
[0052] In step (1), the high-...
Embodiment 2
[0055] a Cr 2 o 5 The preparation method of the carbon fluoride cathode material modified by @C comprises the following steps:
[0056] (1) CrO 3 and carbon fluoride are added to absolute ethanol, and high-energy ball milling is carried out at a speed of 6000r / min to form a mixed slurry; wherein, CrO in the mixed slurry 3 The mass concentration is 16.6%, fluorinated carbon and CrO 3 The mass ratio of = 1:0.9;
[0057] (2) Dry the mixed slurry at 90°C for 12 hours and pass through a 200-mesh sieve to obtain a mixed powder;
[0058] (3) Put the mixed powder in an air atmosphere furnace and heat up to 240°C to obtain a molten mixture;
[0059] (4) Stir the molten mixture for 2h, so that the carbon fluoride and the molten CrO 3 Mix well, continue to heat up to 430°C at a rate of 5°C / min, keep warm for 24 hours, take out, cool, grind, and pass through a 200-mesh sieve to obtain Cr 2 o 5 @C modified carbon fluoride cathode material;
[0060] In step (1), the high-energy bal...
Embodiment 3
[0063] a Cr 2 o 5 The preparation method of the carbon fluoride cathode material modified by @C comprises the following steps:
[0064] (1) CrO 3 and carbon fluoride are added to absolute ethanol, and high-energy ball milling is carried out at a speed of 15000r / min to form a mixed slurry; wherein, CrO in the mixed slurry 3 The mass concentration is 20%, fluorinated carbon and CrO 3 The mass ratio of = 1:0.2;
[0065] (2) Dry the mixed slurry at 75°C for 9 hours and pass through a 120-mesh sieve to obtain a mixed powder;
[0066] (3) Put the mixed powder in an air atmosphere furnace and heat up to 210°C to obtain a molten mixture;
[0067] (4) Stir the molten mixture for 2h, so that the carbon fluoride and the molten CrO 3 Mix well, continue to heat up to 375°C at a rate of 4°C / min, keep warm for 36 hours, take out, cool, grind, and pass through a 120-mesh sieve to obtain Cr 2 o 5 @C modified carbon fluoride cathode material;
[0068] In step (1), the high-energy ball ...
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