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US 8,147,723 B2Granted
Porous anode active material, method of manufacturing the same, anode comprising the same, and lithium battery comprising the anode
AssigneeSamsung Electronics Co., Ltd.
InventorsHansu Kim, Jiman Kim, Chanho Pak, Soosung Kong, Jeongkuk Shon
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Abstract
A porous anode active material including a Group 14 element oxide and a non-active material having no reactivity with lithium; a method of manufacturing the porous anode active material; an anode including the porous anode active material; and a lithium battery including the anode. The non-active material may be silica.
Claims17
A porous anode active material comprising:
- 85-99 parts by weight of a mesoporous Group 14 element oxide;
- and
- 1-15 parts by weight of silica that is formed in particles attached to the surface of the mesoporous Group 14 element oxide and exists in a non-active phase having no reactivity with lithium.
A method of manufacturing a porous anode active material, the method comprising:
- immersing ordered mesoporous silica (OMS) in a Group 14 element salt-containing aqueous solution that comprises a Group 14 element salt and a solvent;
- heat treating the resultant product to form an OMS-Group 14 element oxide complex;
- and
- etching the OMS-Group 14 element oxide complex with an acid solution or a base solution to obtain a porous anode active material comprising:
- 85-99 parts by weight of a mesoporous Group 14 element oxide;
- and 1-15 parts by weight of silica that exists in a non-active phase having no reactivity with lithium.
3 more elements
A method of manufacturing an anode comprising a porous anode active material, the method comprising:
- mixing the porous anode active material with a conductive material, a binder and a solvent to form an anode active material forming composition;
- coating the anode active material forming composition on a collector;
- and
- drying the combination of the anode active material forming composition and the collector, wherein:
- the porous anode active material comprises 85-99 parts by weight of a mesoporous Group 14 element oxide,
- the porous anode active material comprises 1-15 parts by weight of silica that exists in a non-active phase having no reactivity with lithium,
- the mesoporous Group 14 element oxide is selected from the group consisting of tin oxide (SnO2), silicon oxide (SiOx where 0<x<2), germanium oxide (GeO2) and lead oxide (PbO), and
- the mesoporous Group 14 element oxide has mesopores having a diameter of 2 to 50 nm.
5 more elements
Dependencies are inferred from the claim text.