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Spinel Nanocrystals on Graphene
Stanford Reference:
11-094
Abstract
Researchers in Prof. Hongjie Dai's laboratory have developed nanocarbon/inorganic nanoparticle hybrid materials for various electrocatalytic and electrochemical applications, such as batteries and fuel cells. Three types of hybrid materials have been created:
1) Nanocrystals on Graphene Nanoplates or Nanorods:
- Designed for use as electrodes in energy storage and conversion devices.
- Demonstrated high specific capacitance in pseudocapacitor materials, such as Ni(OH)2 nanocrystals grown on graphene sheets.
- Showed excellent cycling ability and performance at different charge and discharge current densities.
2) Nanocrystals on Reduced Graphene Oxide:
- Created high-performance, bi-functional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
- Examples include Mn3O4 on reduced graphene oxide for high-capacity anodes in lithium-ion batteries.
- Co3O4/N-doped graphene exhibited catalytic activity similar to platinum but with superior stability in alkaline solutions.
3) Carbon Nanotube-Graphene Complexes:
- Used for ORR catalysts with high activity and stability.
- Demonstrated high ORR activity in both acidic and alkaline solutions, approaching the performance of platinum.
For more information, please see related docket
S09-371
.
Stage of Development:
The technology has been applied in various devices with promising results
Applications
Batteries
Fuel Cells
Supercapacitors
Advantages
High performance
- high energy densities, high power densities, ultrafast charge/discharge rates, high catalytic activity
Low cost
- materials made from graphene, nanotubes and common metals are much less expensive than precious metals (such as platinum and iridium)
Scalable
Environmentally friendly
materials that can be used with safe electrolytes (such as water and potassium hydroxide for the nickel-iron battery)
Durable catalysts
in both acidic and alkaline electrolytes
Publications
Yongye Liang,Yanguang Li, Hailiang Wang, Jigang Zhou, Jian Wang, Tom Regier & Hongjie Dai,
Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction
, Nature Materials 10, 780–786 (2011), published online 07 August 2011, doi:10.1038/nmat3087
Related Web Links
Dai Lab
Innovators & Portfolio
Hongjie Dai
more technologies from Hongjie Dai »
Yanguang Li
Yongye Liang
Hailiang Wang
more technologies from Hailiang Wang »
Patent Status
Published Application: 20130189580
Published Application: 20140333264
Issued : 9,237,658 (USA)
Issued : 9,362,568 (USA)
Date Released
12/19/2016 12:00
Licensing Contact
Evan Elder, Associate Director, Licensing and Strategic Alliances, Physica
650-725-9558 (Mobile)
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Related Keywords
PS: materials: graphene
energy
PS: materials: nanoparticle
PS: energy storage: fuel cell
PS: energy storage
PS: consumer products: electric vehicles
PS: chemicals: metal nanoparticle
PS: chemicals: electrochemistry
PS: chemicals: catalyst
PS: batteries: sulfur cathode
PS: batteries: lithium sulfur
PS: batteries: lithium ion cathode
PS: batteries: lithium ion anode
PS: batteries: lithium ion
PS: batteries
PS: Automotive: Powertrain
