Anode active material for lithium secondary battery and a...

Details Anode active material for lithium secondary battery and a... Anode active material for lithium secondary battery and a...

2011-03-15

2011-03-15

Yuan, Dah-Wei D (Department: 1727)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S231800, C429S231950

Reexamination Certificate

active

07906236

ABSTRACT:
Provided are an anode active material for a lithium secondary battery having high reversible capacity and excellent charge/discharge efficiency, comprising a complex composed of ultra-fine Si phase particles and an oxide surrounding the ultra-fine Si phase particles, and a carbon material; and a method for preparing the same. The present invention also provides a method for preparing an anode active material for a lithium secondary battery comprising producing a complex composed of ultra-fine Si particles and an oxide surrounding the ultra-fine Si particles by mixing a silicon oxide and a material having an absolute value of oxide formation enthalpy (ΔHfor) greater than that of the silicon oxide and negative oxide formation enthalpy by a mechanochemical process or subjecting them to a thermochemical reaction to reduce the silicon oxide; and mixing the Si phase-containing oxide complex and carbon material.

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“CCCBD List of species with enthalpy of formation at 0 K.” Computational Chemistry Comparison and Benchmark Database. Mar. 26, 2010. <http://cccbdb.nist.gov/hf0k.asp>.
PCT International Search Report; International Application No. PCT/KR2004/001914; International Filing date: Jul. 29, 2003; Date of Mailing: Nov. 17, 2004.

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