Metal-air batteries have attracted special attention in the industry, because of their high energy density, low assembly costs, environmental protection, non-toxicity, long service life, long discharge time, high recyclability, high temperature Wide tolerance.
Metal-air batteries have been widely used in electric vehicles (plug-in hybrid vehicles and pure electric vehicles) and energy storage devices (smart grids), and can also be used as emergency power sources.
Similar to other battery technologies, metal-air batteries also have many scientific research and technical problems. The main problems are sluggish kinetics of the cathode, and low efficiency of anode energy efficiency (because metal oxides, hydroxides or other substances Severe passivation caused by surface area accumulation), self-discharge and corrosion, high overpotential caused by poor air cathode structure, large polarization resistance, uncontrolled thermal dissipation of the system, leading to long-term operation failure, actual energy Density and applications are limited.
The research team of the Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and the Advanced Li-ion Battery Engineering Lab pioneered the development of a kilowatt-level (kilowatt- scale) aluminum-air battery, which uses a highly efficient graphene-based catalyst, and uses graphene additives to improve the air cathode structure and independently developed aluminum alloy anodes. The comprehensive electrochemical performance is excellent.
After optimizing the industrial design and system integration scheme, the battery can be used to overcome the thermal runaway problem.
The agency has published nearly 20 research papers and applied for more than 20 technology patents related to aluminum-air batteries.
The research team demonstrated a kilowatt-class graphene-based aluminum air battery system with high energy density, battery capacity up to 20 kWh, and power output country up to 1000 W.
This battery system can continuously power TVs, desktop computers, fans, and 60-watt lamps for more than 20 hours.
The research team has also established a laboratory production line and is currently developing a 5 kW aluminum-air battery. (This picture is from rdmag.com)