Title:
天然グラファイトの表面精製および粉砕および粒度分布に及ぼす不純物の効果
Document Type and Number:
Japanese Patent JP5739859
Kind Code:
B2
Abstract:
The present invention relates to the physical or chemical specific purification of natural mineral graphite. This purification is preferably applied to the surface of natural graphite in order to allow the formation of a passivation film during the first electrical discharge or the insertion of lithium in the graphite when the latter is used in a lithium-ion cell. The grinding to a small size before purification allows the optimization of the distribution of the particles, resulting in a more uniform electrode. This grinding is carried out in the presence of the natural impurities of the graphite that play the role of a micro-abrasive and result in a hardness of the graphite that increases its mechanical properties.
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Inventors:
The jive kalim
Gautier Michel
Nado Gabriele
Gelfi Abdel Bust
Macei monique
Broche Fernando
Armand Michelle
Gautier Michel
Nado Gabriele
Gelfi Abdel Bust
Macei monique
Broche Fernando
Armand Michelle
Application Number:
JP2012269514A
Publication Date:
June 24, 2015
Filing Date:
December 10, 2012
Export Citation:
Assignee:
HYDRO-QUEBEC
International Classes:
C01B31/04; H01M4/133; H01M4/1393; H01M4/58; H01M4/583; H01M4/587; H01M4/96; H01M10/0525; H01M10/36
Domestic Patent References:
| JP8287910A | ||||
| JP3050110A | ||||
| JP6275321A | ||||
| JP6168725A | ||||
| JP10036108A |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Takaki Nishijima
Atsushi Hakoda
Fumiaki Otsuka
Takaki Nishijima
Atsushi Hakoda