- Patent Title: Method for coating carbon on lithium titanium oxide-based anode active material nanoparticles and carbon-coated lithium titanium oxide-based anode active material nanoparticles produced by the method
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Application No.: US13662994Application Date: 2012-10-29
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Publication No.: US09865866B2Publication Date: 2018-01-09
- Inventor: Jaehoon Kim , Jong Min Park , Kyung Yoon Chung , Agung Nugroho , Byung Won Cho
- Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
- Applicant Address: KR Seoul
- Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
- Current Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
- Current Assignee Address: KR Seoul
- Agency: Ladas & Parry LLP
- Agent Loren K. Thompson
- Priority: KR10-2012-0048704 20120508
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/485 ; H01M4/587 ; H01M4/62 ; H01M4/1391 ; H01M10/052

Abstract:
Disclosed is a method for carbon coating on lithium titanium oxide-based anode active material nanoparticles. The method includes (a) introducing a lithium precursor solution, a titanium precursor solution and a surface modifier solution into a reactor, and reacting the solutions under supercritical fluid conditions to prepare a solution including nanoparticles of an anode active material represented by Li4Ti5O12, (b) separating the anode active material nanoparticles from the reaction solution, and (c) calcining the anode active material nanoparticles to uniformly coat the surface of the nanoparticles with carbon. Further disclosed are carbon-coated lithium titanium oxide-based anode active material nanoparticles produced by the method. In the anode active material nanoparticles, lithium ions are transferred rapidly. In addition, the uniform carbon coating ensures high electrical conductivity, allowing the anode active material nanoparticles to have excellent electrochemical properties.
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