CR2025 battery

New breakthroughs inCR2025 battery research, the latest results published in Nature

Lithium-oxygen batteries with long cycle life in air-like environments

[Introduction]

Due to their high theoretical specific energy, lithium-air batteries are considered potential alternatives to lithium-ion batteries. However, to date, such systems have been mainly limited to pure oxygen environments and have limited cycle life due to side reactions involving the cathode, anode, and electrolyte. These side reactions may become more complicated in the presence of N2, CO2, and water vapor. In addition, due to the need to store O2, the volumetric energy density of the lithium-oxygen system may be too small for practical applications.

[Brief introduction]

Recently, under the leadership of Professor Amin Salehi-Khojin of the University of Illinois at Chicago and Professor Larry A. Curtiss of Argonne National Laboratory (co-corresponding author), in collaboration with Illinois Institute of Technology and California State University, two strategies were used to limit side reactions in lithium-oxygen batteries in simulated air atmospheres containing representative amounts of O2, N2, CO2, and H2O. First, the team developed a Li2CO3/C coated lithium anode that only allows lithium cations to pass through, thereby protecting the anode from the components of simulated air. Second, a cathode was constructed based on previously reported molybdenum disulfide nanosheets, and a mixture of ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIM-BF4) and dimethyl sulfoxide (DMSO) was used as the electrolyte. The components of the system work together to prevent the formation of byproducts in the presence of CO2 and H2O. It works as aCR2025 battery in a simulated air environment with a cycle life of up to 700 times. The related results were published in Nature under the title "Alithium–oxygen battery with along cycle life in an air-like atmosphere".

[Summary]

According to characterization and computational studies, the protected lithium anode, electrolyte mixture and high-performance air cathode work together to provide a lithium-oxygen battery with a long cycle life under simulated air conditions. The energy density of this new architectureCR2025 battery is much higher than that of current lithium-ion batteries, which is a promising step in this field.

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