According to foreign media, after repeated charging and discharging, a non-active layer will be formed around the lithium ion battery material, which will affect the performance of the battery.For this reason, a team of chemists has been working on new methods to prevent the decomposition of the anode materials of lithium ion batteries.
The team from the University of Georgia institute of technology (Georgia Tech) and Elsa Reichmanis state University of New York at Stony Brook, Stony Brook University) of Amy c. Marschilok led, made a mesh structure, single-walled carbon nanotubes can use PPBT (poly real [3 - (4 - butanoate potassium -) thiophene]) SWNT fixed on the battery materials.
The carboxylic acid base of PPBT can be combined with the polar surface of the battery material, and the thiophene backbone can be used to contact with SWNT, and the electron can flow within the swnt-ppbt network structure.The nanotube network around the battery material presents a porous structure that allows lithium ions to move in the battery material and prevents the battery material from expanding.
The system can be combined with two types of battery anode materials -- magnetite nanoparticles and silicon nanoparticles.
Polymer with the university of Illinois at urbana-champaign, and electronic materials expert Paul v. Braun, points out that the study proved that the new method can realize the maximization of the battery performance need to holistic overall design of the battery electrode, consider lithium ion and electron conductivity, activity space, and factors related to a specific chemical reaction.
Reichmanis said the method has been instrumental in the development of battery technology, ensuring uniformity and reliability in the manufacture of components.