According to foreign media reports, Professor Linda Nazar of the University of Waterloo in Canada announced that his research team has achieved four-electron conversion for the first time. This technology will double the electronic storage capacity of lithium-oxygen (Li-Ogen) batteries. .
The Nazar team converted the organic electrolyte into an inorganic molten salt of lithium nitrate / potassium nitrate, aiming to improve its chemical stability and conductivity. In addition, the team replaced the porous carbon cathode with a dual-function metal oxide catalyst to increase the battery capacity while reducing the overpotential.
Compared with Li2O2, at 150 degrees Celsius, the battery will generate more stable Li2O during use, and its thermodynamic performance is even better. This battery cell uses a variety of materials to improve its thermodynamic performance and reaction kinetics. The charging performance of the battery developed by the researchers is better. In theory, its energy storage performance has been improved by 50%.
In the field of battery research, lithium-oxygen batteries are quite attractive, mainly due to their theoretical energy density. Energy density is the energy storage capacity of the material. When the battery cell undergoes an electrochemical reaction, its energy will be stored in the battery cell.
Earlier, the technical challenges of lithium-oxygen batteries focused on the cathode, organic electrolyte, superoxide and lithium peroxide of the battery. However, the study has solved all intrinsic limitations and proved the possibility of four-electron transmission within the battery, the reversibility of the reaction, and its theoretical coulombic efficiency is close to 100%.
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