Electrode structure for lithium secondary battery and secondary battery having such electrode structure

  • US 20060127773A1
  • Filed: 12/08/2005
  • Published: 06/15/2006
  • Est. Priority Date: 12/10/2004
  • Status: Active Grant
First Claim
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1. An electrode structure for a lithium secondary battery, comprising:

  • a main active material layer comprising a metal powder of a material selected from the group consisting of silicon, tin and an alloy thereof that can store and discharge lithium by electrochemical reaction, and a binder of an organic polymer; and

    a current collector;

    wherein (a) the main active material layer further comprises a powder of a support material for supporting electron conduction of the main active material layer in addition to the metal powder;

    the powder of the support material are particles having a spherical, pseudo-spherical or pillar shape with an average particle size of 0.3 to 1.35 times an average thickness of the main active material layer; and

    the support material comprises one or more materials selected from the group consisting of graphite, an oxide of a transitional metal selected from TiO2, MoO3 and WO3, and a metal electrochemically not forming an alloy with Li which is selected from Cu, Ni, Co, Ti, Fe, Cr, Mo, W, Pd, Pt and Au and an alloy thereof.

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