Carbon material supported hollow metal oxide nanoparticles, methods and applications

Patent metadata

Field	Value
Publication number	US-10018583-B2
Application number	US-201414778129-A
Country	US
Kind code	B2
Filing date	Mar 21, 2014
Priority date	Mar 21, 2013
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A method for preparing a material composition comprising a hollow transition metal oxide nanoparticle supported upon a carbon material support includes a solution impregnation process step, followed by a thermal reduction process step and finally a thermal oxidation process step. The material composition, an electrode and an electrical component such as but not limited to a battery are all predicated at least in-part upon the material composition prepared in accord with the foregoing method. The foregoing material composition, electrode, battery and method may ultimately provide a LIB with enhanced performance.

First claim

What is claimed is:

1. A method for preparing a material composition comprising:
impregnating a carbon material support with a transition metal salt to form a transition metal salt impregnated carbon material support;
thermally annealing the transition metal salt impregnated carbon material support within a reducing environment to provide a reduced transition metal particle supported on the carbon material support; and
thermally annealing the reduced transition metal particle supported on the carbon material support within an oxidizing environment to provide a hollow transition metal oxide nanoparticle supported on the carbon material support, wherein:
the hollow transition metal oxide nanoparticle has:
a particle size from about 50 to about 300 nanometers;
a pore size from about 5 to about 100 nanometers; and
a hollow volume percentage from about 20 to about 60 percent, wherein the hollow volume includes:
a primary void of greater than about 50 nm;
a plurality of secondary voids of less than about 10 nm; and
a uniform elemental distribution of metal and oxygen across the nanoparticle.

Assignees

• Univ Cornell
• Univ Huazhong Science Tech

Inventors

• Yu Yingchao
• Abruña Héctor D
• Wang Deli
• Zhou Weidong
• Hongfang Liu
• Shuang Qin

Classifications

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• G01N27/308 Primary

  at least partially made of carbon · CPC title

• H01G11/30 Primary

  characterised by their material · CPC title

• H01G11/24

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title