Lithium ion battery composite positive electrode slurry, positive electrode plate and lithium ion battery
A technology for lithium-ion batteries and composite positive electrodes, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor low-temperature performance of lithium iron phosphate, achieve good thermal stability, avoid loss of active materials, and have long cycle life Effect
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Embodiment 1
[0053] This embodiment provides a lithium-ion battery composite positive electrode slurry, and the specific preparation method is as follows.
[0054] (1) First prepare the carbon-iodine complex:
[0055] Disperse the activated carbon in deionized water, add iodine, then add NaOH solution to make the solution alkaline, stir at room temperature for 3 days, then add hydrochloric acid to make the solution pH 2, wash with water until the solution is neutral, and dry to obtain the carbon Iodine complex. The content of iodine in the carbon-iodine complex is 80 wt.%.
[0056] (2) Then prepare the lithium-ion battery composite cathode slurry:
[0057]Take 20g carbon-iodine complex, 70g lithium iron phosphate, 2g Ketjen Black, 2g dispersant CMC, add deionized water and stir at 2500rpm for 4 hours, then add 15g aqueous binder SBR emulsion (SBR content 40wt.%), to The positive electrode slurry was obtained by stirring at 300 rpm for 30 minutes, and the solid content of the slurry was ...
Embodiment 2
[0066] This embodiment provides a lithium-ion battery composite positive electrode slurry, and the specific preparation method is as follows:
[0067] (1) First prepare the carbon-iodine complex:
[0068] Disperse the activated carbon in deionized water, add iodine, then add NaOH solution to make the solution alkaline, stir at room temperature for 3 days, then add hydrochloric acid to make the solution pH 2, wash with water until the solution is neutral, and dry to obtain the carbon Iodine complex. The content of iodine in the carbon-iodine complex is 80 wt.%.
[0069] (2) Then prepare the lithium-ion battery composite cathode slurry:
[0070] Take 12g carbon-iodine composite, 78g lithium iron phosphate, 2g Ketjen black, 8g oily binder PVDF, add N-methylpyrrolidone and stir at 2000rpm for 4 hours to obtain the positive electrode slurry, the solid content of the slurry is 35wt .%.
[0071] This embodiment also provides a lithium-ion battery positive pole piece, and the prep...
Embodiment 3
[0079] This embodiment provides a lithium-ion battery composite positive electrode slurry, and the specific preparation method is as follows:
[0080] (1) First prepare the carbon-iodine complex:
[0081] Disperse the activated carbon in deionized water, add iodine, then add NaOH solution to make the solution alkaline, stir at room temperature for 3 days, then add hydrochloric acid to make the solution pH 2, wash with water until the solution is neutral, and dry to obtain the carbon Iodine complex. The content of iodine in the carbon-iodine complex is 80 wt.%.
[0082] (2) Then prepare the lithium-ion battery composite cathode slurry:
[0083] The first slurry: take 12g carbon-iodine composite, 78g lithium iron phosphate, 3g acetylene black, 7g oily binder PVDF, add N-methylpyrrolidone and stir at 2000rpm for 5 hours to obtain the positive electrode slurry, the slurry The solids content was 35 wt.%.
[0084] The second slurry: take 90g carbon-iodine complex, 2g Ketjen Blac...
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Abstract
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