Secondary cell and method for manufacturing same

Secondary cell and method for manufacturing same

  • CN 106,463,698 A
  • Filed: 03/06/2015
  • Published: 02/22/2017
  • Est. Priority Date: 04/11/2014
  • Status: Active Grant
First Claim
Patent Images

1. secondary cell, it comprisesLaminated electrode, wherein, arranges including plus plate current-collecting body paper tinsel and positive pole in the way of isolating membrane inserts between positive pole and negative poleThe positive pole of mixture layer and the negative pole including negative current collector paper tinsel and negative electrode mix layer;

  • WhereinDescribed plus plate current-collecting body paper tinsel is made up of aluminum or aluminum alloy, and described positive-electrode mixture layer comprises the positive pole containing at least nickel and lithiumActive material, and form protective layer between plus plate current-collecting body paper tinsel and positive-electrode mixture layer;

    Described protective layer comprises multiple carbon granules;

    Described carbon granule is the thin slice of the thickness having principal plane and being orthogonal to described principal plane, and wherein in described principal planeA direction on length L1, length L2 on being orthogonal to the direction in the one direction in described principal plane andLength L3 on described thickness direction meets 5 >

    =(L1/L2) >

    =1, (L1/L3) >

    =5, L2>

    The relation of L3 and L1 >

    =4 μ

    m;

    Described carbon granule is arranged so that in protective layer, described principal plane is at least handed over the thickness direction of described protective layerFork;

    AndThe average thickness of described protective layer is not less than 10 μ

    m and no more than 100 μ

    m.

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