Lithium-ion batteries have become the most popular battery technology in today’s world. These batteries use lithium-cobalt oxides (LiCoO2) as the main material for their positive electrodes, also known as cathodes. The cathode plays a significant role in the capacity, performance, and heat management of lithium-ion batteries. However, one major concern with these batteries is the generation of hydrogen through water splitting, which contributes to their deterioration.
To address this issue, a team of researchers from Meijo University, led by Professor Bun Tsuchiya, conducted a comprehensive study on hydrogen uptake and loss in LiCoO2 cathode materials immersed in water at room temperature. Their aim was to understand how hydrogen builds up and is removed in LiCoO2 and identify stable locations within the structure for hydrogen trapping.
The study utilized various analytical techniques, including weight gain and elastic recoil detection methods, to investigate the concentration of hydrogen in the material after immersion in water at specific temperatures. Gas chromatography was also used to analyze the release of hydrogen gas and determine the temperature at which dissociation occurred. Additionally, density functional theory calculations indicated that hydrogen atoms preferentially occupied lithium sites in the crystal structure of LiCoO2.
The findings of the study shed light on the role of LiCoO2 in storing hydrogen at room temperature through water splitting. This knowledge has significant implications for the development of more efficient lithium-ion batteries and the potential for low-energy production of hydrogen. Prof. Tsuchiya envisions a future society dependent on hydrogen, where hydrogen can be produced from abundant water resources with minimal energy input.
In conclusion, this research provides valuable insights into the storage and release of hydrogen in LiCoO2 cathode materials. By addressing the degradation issue in lithium-ion batteries and exploring environmentally friendly energy-storage technologies like water splitting, we can pave the way for a more sustainable and efficient future.
The source of the article is from the blog lanoticiadigital.com.ar