公开(公告)号：US09865866B2

公开(公告)日：2018-01-09

申请号：US13662994

申请日：2012-10-29

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jaehoon Kim ,  Jong Min Park ,  Kyung Yoon Chung ,  Agung Nugroho ,  Byung Won Cho

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/587 ,  H01M4/62 ,  H01M4/1391 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/587 ,  H01M4/625 ,  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.