< Advanced Catalyst for Lithium-Air Secondary Battery Developed > (April 5)
- New tech may be used for commercializing lithium-air secondary battery for electric vehicles, other applications
The Ministry announced that "a new and advanced catalyst for net-generation lithium-air secondary batteries, a technology that uses the redox between lithium and oxygen to guide electrical current in the lithium-air secondary battery, has been developed."
The study was conducted by a team headed by Professor Kim Dong-wan of Korea University with support from the Ministry's Basic Research Support Program (Individual Researcher), with the results published as the cover paper of the March 22 issue of Advanced Energy Materials, a global energy journal.
-Paper: TMnMoO4 electrocatalysts for superior long-life and high-rate lithium-oxygen batteries
Lithium-air secondary batteries are 5 to 15 times more energy-dense than the more familiar lithium-ion secondary batteries, but are slower to charge and have shorter life spans.
To solve these limitations, MnMoO4 nano-wires were used for the first time as the cathode catalyst for lithium-air secondary batteries, which allowed high-rate charging in approximately 20 minutes and increased the life of the battery by fivefold compared to batteries using carbon-based catalysts.
The study revealed the design of a new, low-cost oxidant nano-catalyst that can be used for the cathodes of these types of batteries as well as the nano structure that can maximize catalytic activation and the importance of crystallographical flaws in designing such catalysts.
The new nano-catalyst may find application in electric vehicles, allowing lithium-air batteries to maintain long-term energy density while providing rapid charging capabilities.
Professor Kim explained the significance of the study by stating, "The study identified a design for a new, low-cost catalyst for lithium-air batteries and developed a nano-manufacturing process for mass synthesis. The new catalyst provides faster charging and longer life compared to existing carbon catalysts. When applied to EVs, the new batteries will enable longer range and extended use. The new catalyst is expected to accelerate the commercialization of lithium-air secondary batteries, the next-generation large-capacity energy storage technology that is current in development."