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Nonaqueous electrolyte rechargeable battery, and negative electrode and material thereof

  • US 8,119,287 B2
  • Filed: 05/15/2006
  • Issued: 02/21/2012
  • Est. Priority Date: 05/16/2005
  • Status: Active Grant
First Claim
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1. A negative electrode material for a nonaqueous electrolyte rechargeable battery in the form of panicles comprising:

  • at least on the surface thereof, a compound of the phase in which an element Z is present in Si in a non-equilibrium state,whereinthe compound contains Si, the element Z and another element M in the composition expressed by a general formula
    SiZxMy,whereinthe element Z is C,the element Z has a dimension of less than or equal to 500 nm,x is from 0.05 to 0.90,the element M is one element or two or more elements selected from elements other than Si and the element Z, andy is a number from greater than 0 to 0.5 wherein y is not 0, andx+y is less than or equal to 1.

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