A method for preparing a particulate cathode material, and the material obtained by said method

A method for preparing a particulate cathode material, and the material obtained by said method

  • CN 101,636,861 B
  • Filed: 12/07/2007
  • Issued: 07/01/2015
  • Est. Priority Date: 12/07/2006
  • Status: Active Grant
First Claim
Patent Images

1. prepare a method for electrode material, described electrode material comprises the particle with composite oxides core, and there is conductive deposits carbon at least part of surface of described composite oxides core, wherein,Described particle comprises the micron order agglomerate of basic nano particle and basic nano particle, andDescribed conductive deposits carbon is non-powder deposition, and is present at least part of surface of described basic nano particle and described agglomerate, wherein,Described basic nano particle is of a size of 5nm to 1.0 μ

  • m, and comprises primary nanoparticle and secondary granule, wherein said primary nanoparticle by composite oxides when have carbon or carbon-free make,Described secondary granule is the aggregation of primary nanoparticle, described primary nanoparticle by there is interior surface porousness and deposit carbon is less than the carbon bridge of the local sintering composite oxides of 30% or bridged bond combines,Described agglomerate is the gathering of primary nanoparticle and secondary granule;

    Described method comprises;

    -nano-milledly in bead mill be dispersed in composite oxide particle in carrier solvent or precursor of compound oxide particle;

    -described nano-milled before, in process or afterwards, in described composite oxide particle or precursor of compound oxide particle, add organic carbon precursor, and the mixture obtained carried out pyrolysis;

    With-nano-milled particle size be carried out, select by following requirement for nano-milled bead size and the particle size that obtains;

    0.004≤

    MS(SP)/MS(B)≤

    0.120.0025≤

    MS(FP)/MS(SP)≤

    0.25Wherein MS (SP) represents the average diameter of nano-milled front particle, and MS (FP) expression is the average diameter of nano-milled rear particle, and the average diameter that MS (B) is nano-milled bead.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×