According to foreign media reports, after repeated charge and discharge, a non-active layer will form around the lithium battery material, affecting the performance of the battery. To this end, the chemist team has been researching a new method 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) network. The structure can be used to use PPBT (poly'3-(potassium-4-butanoate) thiophene') SWNT fixed on the battery material.
The carboxylate groups of the PPBT may be coordinated with the polar surface of the battery material. The thiophene backbone may contact with the SWNT using π-bonding. The electrons may be in the SWNT. - Flow in the PPBT mesh structure. The nanotube network around the battery material presents a porous structure that allows lithium ions to move in the battery material and also prevents the cell material from swelling.
The system can be paired with two types of battery anode materials - magnetic nanoparticle and silicon nanoparticle.
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 the overall design of the battery electrode is needed. , Consider lithium ion and electron conductivity, activity space and specific chemical reactions and other related factors.
Reichmanis said that this method has played a role in the development of battery technology, and it needs to ensure the uniformity and reliability of the material during the manufacture of components.
