Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CARBON-BASED COMPOSITE FOR OXYGEN REDUCTION CATALYST, METHOD FOR PRODUCING CARBON-BASED COMPOSITE FOR OXYGEN REDUCTION CATALYST, AND USE OF CARBON-BASED COMPOSITE FOR OXYGEN REDUCTION CATALYST
Document Type and Number:
WIPO Patent Application WO/2019/176511
Kind Code:
A1
Abstract:
The present invention addresses the problem of preparing a carbon-based composite for an oxygen reduction catalyst, the carbon-based composite comprising: a nanosheet-like graphene oxide or a reduction product thereof; and carbon quantum dots. The average particle diameter of the carbon quantum dots may be 20 nm or less. The nanosheet-like graphene oxide or the reduction product thereof, and the carbon quantum dots may be complexed in a uniformly mixed state. The carbon quantum dots may contain nitrogen atoms. The weight ratio of the nanosheet-like graphene oxide or the reduction product thereof to the carbon quantum dots may be 90/10 to 10/90 (the former/the latter). The carbon-based composite and a conductive aid may be combined to prepare a composite for a battery cathode catalyst layer. The conductive aid may be Ketjenblack. The carbon-based composite can be prepared simply and inexpensively, does not contain platinum, and can exhibit excellent oxygen reduction electrode characteristics.

Inventors:
NAKAGAWA NOBUYOSHI (JP)
ISHITOBI HIROKAZU (JP)
TANAKA YUUKI (JP)
OTSUKA YOSHIHIRO (JP)
Application Number:
PCT/JP2019/006942
Publication Date:
September 19, 2019
Filing Date:
February 25, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
UNIV GUNMA NAT UNIV CORP (JP)
DAICEL CORP (JP)
International Classes:
B01J21/18; B01J35/02; B01J37/10; B01J37/16; B01J37/34; C01B32/15; C01B32/194; C01B32/198; H01M4/88; H01M4/90; H01M4/96; H01M8/10
Foreign References:
CN106910901A2017-06-30
JP2008234968A2008-10-02
JPH10189006A1998-07-21
JP2016096141A2016-05-26
US20150085427A12015-03-26
JP2016527166A2016-09-08
Other References:
NIU, W. J. ET AL.: "One-pot synthesis of nitrogen-rich carbon dots decorated graphene oxide as metal-free electrocatalyst for oxygen reduction reaction", CARBON, vol. 109, 15 August 2016 (2016-08-15), pages 402 - 410, XP029786592
LIU, H. ET AL.: "Synergistically enhanced activity of nitrogen-doped carbon dots/graphene composites for oxygen reduction reaction", APPLIED SURFACE SCIENCE, vol. 423, 27 June 2017 (2017-06-27), pages 909 - 916, XP055636179
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (JP)
Download PDF: