Title:
チタン酸リチウムナノ粒子とカーボンの複合体の製造方法
Document Type and Number:
Japanese Patent JP5829796
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide lithium titanate nanoparticles in which oxygen defects are generated in lithium titanate by means of the reducing action of carbon, and nitrogen is doped in the oxygen defect sites, and to provide a composite of the lithium titanate nanoparticles and carbon, and to provide a method for producing the composite.SOLUTION: A mixed solvent is prepared by dissolving acetic acid and lithium acetate in a mixture of isopropanol and water. The mixed solvent is injected into a whirling reactor along with titanium alkoxide and carbon nanofibers (CNF), and an inner tube is gyrated for 5 minutes at a centrifugal force of 66,000 N(kgms) in order to form a thin film of a reactant on the inner wall of an outer tube. Subsequently, the chemical reaction of the reactant is speeded up by applying sheer stress and centrifugal force thereto, thereby obtaining CNFs on which the precursor of lithium titanate nanoparticles is supported in a highly dispersed manner. The obtained composite powder is heated for 3 minutes at 900°C in a nitrogen atmosphere, thereby obtaining a composite powder in which lithium titanate nanoparticles, the lithium titanate of which has advanced crystallization, are supported by the CNFs in a highly dispersed manner.
Inventors:
Katsuhiko Naoi
Shuichi Ishimoto
Kenji Tamako
Kazuko Naoi
Shuichi Ishimoto
Kenji Tamako
Kazuko Naoi
Application Number:
JP2010084632A
Publication Date:
December 09, 2015
Filing Date:
March 31, 2010
Export Citation:
Assignee:
Nippon Chemi-Con Co., Ltd.
K&Double Co., Ltd.
National University Corporation Tokyo University of Agriculture and Technology
K&Double Co., Ltd.
National University Corporation Tokyo University of Agriculture and Technology
International Classes:
C01G23/00; B82B1/00; B82B3/00; B82Y30/00; B82Y40/00; B82Y99/00; C01B31/02; H01G11/06; H01G11/22; H01G11/30; H01G11/32; H01G11/46; H01M4/36; H01M4/485
Domestic Patent References:
| JP2006032321A | ||||
| JP2008270795A |
Foreign References:
| WO2009140501A1 |
Other References:
Katsuhiko NAOI et al.,High-rate nano-crystalline Li4Ti5O12 attached on carbon nano-fibers for hybrid supercapacitors,Journal of Power Sources,2010年 9月15日,Vol.195 No.18,Page.6250-6254,Available online 2010.01.13
Attorney, Agent or Firm:
Kiuchi Mitsuharu