Invention Grant
- Patent Title: Process for manufacturing lithium titanium oxides
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Application No.: US14895202Application Date: 2014-05-30
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Publication No.: US09966599B2Publication Date: 2018-05-08
- Inventor: Hiroomi Horie , Naoya Nagahashi , Tsunehisa Takeuchi
- Applicant: Ishihara Sangyo Kaisha, Ltd.
- Applicant Address: JP Osaka
- Assignee: ISHIHARA SANGYO KAISHA, LTD.
- Current Assignee: ISHIHARA SANGYO KAISHA, LTD.
- Current Assignee Address: JP Osaka
- Agency: Manelli Selter PLLC
- Agent Jeffrey S. Melcher
- Priority: JP2013-117992 20130604
- International Application: PCT/JP2014/064398 WO 20140530
- International Announcement: WO2014/196462 WO 20141211
- Main IPC: H01M4/00
- IPC: H01M4/00 ; H01M4/485 ; C01G23/00 ; H01M4/04 ; H01M4/1391 ; C01G23/04

Abstract:
Provided is lithium titanate that is readily pulverized, and readily dispersed in a binding agent. The lithium titanate is characterized in that the value of a degree of pulverization Zd representing the ratio of the 50% cumulative diameter pre- and post-pulverization is 2 or greater. The lithium titanate is produced by the following steps (1)-(3). (1) a step in which titanyl sulfate or titanium sulfate is thermally hydrolyzed to produce metatitanic acid; (2) a step in which a slurry containing the metatitanic acid is prepared, and the slurry, subsequent to neutralization to bring the pH to 6.0-9.0, undergoes solid-liquid separation, to produce a metatitanic acid-containing titanium starting material having a BET specific surface area of 100-400 m2/g, and in which the sulfuric acid (SO4) content is 0.01-2.0 mass % with respect to the amount of metatitanic acid, on a TiO2-converted basis; and (3) a step in which the titanium starting material and a lithium compound are mixed and baked.
Public/Granted literature
- US20160118657A1 PROCESS FOR MANUFACTURING LITHIUM TITANIUM OXIDES Public/Granted day:2016-04-28
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