According to foreign media reports, after repeated charge and discharge, the lithium battery material will form an inactive layer around the material, affecting the performance of the battery. To this end, a team of chemists has been developing new methods to prevent lithium battery anode material decomposition.
The team was led by Elsa Reichmanis of Georgia Tech and Amy C. Marschilok of Stony Brook University to create a single-walled carbon nanotube (SWNT) mesh. In the structure, the SWNT can be fixed on the battery material by using PPBT (poly[3-(potassion-4-butanoate) thiophene]).
The carboxylate groups of PPBT can be combined with the polar surface of the battery material, and the thiophene backbone can be contacted with SWNTs using π-bonding. The electrons can be in the SWNT. - The flow within the PPBT mesh structure. The nanotube network around the cell material presents a porous structure that allows lithium ions to move within the cell material and also prevents cell material from expanding.
The system can be paired with two types of battery anode materials - magnetite nanoparticles and silicon nanoparticles.
Paul V. Braun, an expert in polymer and electronic materials at the University of Illinois, Urbana-Champaign, pointed out that this research proves that the new method can maximize the performance of the battery and requires the overall design of the battery electrode as a whole. Consider factors such as lithium ion and electron conductivity, active space, and specific chemical reactions.
Reichmanis said that this method has played an important role in the development of battery technology, and it is necessary to ensure the uniformity and reliability of the materials during the manufacture of components.
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