Title:
METHOD FOR PREPARING NANOCOMPOSITE COMPRISING TIN-BASED MULTIPHASE NANOSTRUCTURE AND AMORPHOUS CARBON, AND CATHODE ACTIVE MATERIAL CONTAINING SAME
Document Type and Number:
WIPO Patent Application WO/2013/176363
Kind Code:
A1
Abstract:
The present invention relates to a tubular nanocomposite comprising: multiphase tin oxides having a zero-dimensional shape through a thermochemical reduction of a bacteria/tin oxide powder, obtained by directly binding tin oxide onto the surface of bacteria of the Bacillus genus, in an hydrogen atmosphere; and a complex of amorphous carbon derived from tin metals and bacteria. It is possible to resolve a low capacity and a low output (a low capacity at a high current density), and a large decrease in capacity with cycling due to a large change in volume during a reaction with lithium, which have been indicated as the shortcomings of a conventional cathode active material for a lithium secondary battery, by preparing a tubular nanocomposite comprising amorphous carbon/tin element-based multiphase low-dimensional nanostructures to be prepared by utilizing bacterial as a template, binding tin oxide capable of implementing a high capacity onto the surface of the bacteria, and thermochemically reducing the same. The thermochemical reduction of the present invention has a simple and economical preparation process, enables preparation of various shapes of a composite according to the shape of a bacteria template to be used, and facilitates low temperature synthesis, intermediate synthesis, and mass production. Thus, the present invention is expected to have practical applicability to the lithium secondary battery field and the electrical double-layer capacitor field.
Inventors:
KIM DONG WAN (KR)
SHIM HYUN WOO (KR)
LIM AH HYEON (KR)
SHIM HYUN WOO (KR)
LIM AH HYEON (KR)
Application Number:
PCT/KR2012/011355
Publication Date:
November 28, 2013
Filing Date:
December 24, 2012
Export Citation:
Assignee:
AJOU UNIV IND ACAD COOP FOUND (KR)
International Classes:
B82B3/00; C12P9/00; H01M4/139; H01M4/48
Foreign References:
| KR20100092324A | 2010-08-20 | |||
| KR20090105786A | 2009-10-07 | |||
| KR20070017319A | 2007-02-09 |
Other References:
RYU, JUNG KI ET AL.: "Mineralization of self-assembled peptide nanofibers for rechargeable lithium ion batteries", ADV. MATER., vol. 22, 2010, pages 5537 - 5541
SHIM, HYUN-WOO ET AL.: "Synthesis of Manganese Oxide Nanostructures Using Bacterial Soft Template", CRYSTENGCOMM, vol. 13, 2011, pages 6747 - 6752
SHIM, HYUN-WOO ET AL.: "Synthesis of Manganese Oxide Nanostructures Using Bacterial Soft Template", CRYSTENGCOMM, vol. 13, 2011, pages 6747 - 6752
Attorney, Agent or Firm:
HWANG MOK PARK IP GROUP (KR)
특허법인 충정 (KR)
특허법인 충정 (KR)
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