A kind of titanium phosphate lithium coats LiNi1/3Co1/3Mn1/3O2Positive electrode and preparation method thereof

A kind of titanium phosphate lithium coats LiNi1/3Co1/3Mn1/3O2Positive electrode and preparation method thereof

  • CN 107,492,643 A
  • Filed: 07/31/2017
  • Published: 12/19/2017
  • Est. Priority Date: 07/31/2017
  • Status: Active Application
First Claim
Patent Images

1. a kind of titanium phosphate lithium coats LiNi1/3Co1/3Mn1/3O2The method of tertiary cathode material, it is characterised in that including following stepSuddenly:



  • 1)

    Hydroxyl nickel cobalt manganese Ni prepared by coprecipitation1/3Co1/3Mn1/3(OH)2Presoma and lithium carbonate Li2CO3In absolute ethyl alcoholBall milling was transferred in 50 DEG C of baking ovens and dried 8 ~ 12 hours after 4 ~ 6 hours in medium;



    2)

    Gained powder is sintered in Muffle furnace, and LiNi is obtained after sieving1/3Co1/3Mn1/3O2Positive electrode;



    3)

    By LiNi1/3Co1/3Mn1/3O2After ultrasonic disperse is uniform in absolute ethyl alcohol and acetone mixed solution, the fourth of metatitanic acid four is addedEster C16H36O4Ti, stir 60 ~ 70 minutes, 8 ~ 15 mL deionized waters are then added dropwise, stir 60 ~ 70 minutes, be eventually adding di(2-ethylhexyl)phosphateHydrogen ammonia NH4H2PO4, lithium hydroxide LiOHH2O is stirred 10 ~ 12 hours;



    4)

    Filtering, washing, dry, obtain powder and be sintered in Muffle furnace, being sieved after cooling obtains titanium phosphate lithium LiTi2(PO4)3The LiNi of cladding1/3Co1/3Mn1/3O2Tertiary cathode material;



    5)

    By titanium phosphate lithium LiTi2(PO4)3The LiNi of cladding1/3Co1/3Mn1/3O2Positive electrode and acetylene black, Kynoar(

    PVDF)

    Slurry is stirred into, is coated on aluminium foil, by drying, rushes film and titanium phosphate lithium LiTi is made in press mold2(PO4)3CladdingLiNi1/3Co1/3Mn1/3O2Positive electrode pole piece.

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