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Graphene Moisture-Resistive Membrane Cathode for Li-Air Battery in Ambient Conditions

技术优势

Hydrophobic, oxygen selective membrane3D interconnected cavernous structure shows excellent and stable electron transportGraphene produced via a scalable solution processHigh columbic efficiencyHigh cycle lifeLow charging overpotentialCan be performed in air and ambient conditionsOver 20 times more efficient than commercially available products (when used as a non-rechargeable battery)

技术应用

Bulk energy storage or electronic power source for hybrid or electric vehiclesAlternatives to lithium-ion batteries for both one-time use and rechargeable batteriesBulk storage for energy grid

详细技术说明

UCLA researchers have developed a graphene moisture-resistive membrane cathode that functions as a water-resistive and catalytically effective cathode in Li-air system under ambient operating conditions. The graphene cathode offers simplified design, high capacitance, and long cycle life.

*Abstract

UCLA researchers have developed a graphene moisture-resistive membrane cathode for Li-air batteries operating under ambient conditions. This new technology may allow for the development of an industrially scalable approach towards high energy density rechargeable and one-time use metal-air batteries.

*Applications

• Bulk energy storage or electronic power source for hybrid or electric vehicles
• Alternatives to lithium-ion batteries for both one-time use and rechargeable batteries
• Bulk storage for energy grid

*Principal Investigation

Name: Xiangfeng Duan

Department:

Name: Yuxi Xu

Department:

Name: Xing Zhong

Department:

其他

State Of Development

A successful coin cell working prototype has been developed and tested in lab.

Background

Metal-air batteries are an attractive candidate for energy storage because they offer a simplified cell design and up to 15 times the energy density compared to current state of the art lithium batteries. Metal-air batteries consist of an exposed porous carbon electrode – the air cathode, which traps oxygen gas – separated from the metal anode by an electrolyte. Many metals have been found appropriate for use as an anode, including Ca, Al, Fe, Cd, Zn and Li. Lithium metal is an attractive choice for the anode because of its large specific energy - a measure of the amount of energy a battery can store for a given weight - with respect to air. However, Li-air batteries have not been widely adopted due to lithium’s high reactivity with moisture under operating conditions. The main challenge in cathode development is to ensure sufficient oxygen diffusion while retarding moisture ingression, and to provide a conductive network with sufficient space for holding the insulating discharging materials. A porous graphene membrane offers high surface area, highly porous structure and oxygen selectivity, and is demonstrated to function as a highly effective air-cathode for Li-air batteries. It would greatly advance the commercial adoption of Li-air batteries.

Additional Technologies by these Inventors

• Graphene Nanomesh As A Continuous Semiconducting Thin Film For Large Scale Field Effect Transistors
• Vertical Heterostructures for Transistors, Photodetectors, and Photovoltaic Devices
• A Composite of Two Dimensional Material and One Dimensional Material as Transparent Conductor
• Conductor-Semiconductor Composite Films and Their Applications for High Performance Transistors
• Chemical Vapor Deposition Growth of the Large Single Crystalline Domains of Monolayer and Bilayer
• Graphene Based Catalysts for Biomimetric Generation of Antithrombotic Species
• Palladium Alloy Hydride Nano Materials
• High Performance Thin Films from Solution Processible Two-Dimensional Nanoplates
• Nanoscale Optical Voltage Sensors
• Ultrafine Nanowires As Highly Efficient Electrocatalysts
• Pore Size Engineering Of Porous Carbons Using Covalent Triazine Frameworks As Precursors
• The Method of Enhanced Pressure Sensing Performance for Pressure Sensors
• Very High Energy Density Silicide-Air Primary Batteries
• Wafer Scale Growth Of Large Arrays Of Perovskite Micro-Plate Crystals For Functional Electronics And Optoelectronics
• Three-Dimensional Holey Graphene Frameworks Based High-Performance Supercapacitors
• High Performance PtNiCuMo Electrochemical Catalyst
• Graphene Nanomesh As A Glucose Sensor
• Upconversion Plasmonic Mapping: A Direct Plasmonic Visualization And Spectrometer-Free Sensing Method
• Electrochemical Molecular Intercalation for Synthesis of Monolayer Atomic Crystal Molecular Superlattices

Tech ID/UC Case

24503/2014-347-0

Related Cases

2014-347-0

国家/地区

美国