Carbon Nanotube Web with Carboxylated Polythiophene “Assist” for High-Performance Battery Electrodes
A carbon nanotube (CNT) web electrode comprising magnetite spheres and few-walled carbon nanotubes (FWNTs) linked by the carboxylated conjugated polymer, poly[3-(potassium-4-butanoate) thiophene] (PPBT), was designed to demonstrate benefits derived from the rational consideration of electron/ion transport coupled with the surface chemistry of the electrode materials components. To maximize transport properties, the approach introduces monodispersed spherical Fe3O4 (sFe3O4) for uniform Li+ diffusion and a FWNT web electrode frame that affords characteristics of long-ranged electronic pathways and porous networks. The sFe3O4 particles were used as a model high-capacity energy active material, owing to their well-defined chemistry with surface hydroxyl (−OH) functionalities that provide for facile detection of molecular interactions. PPBT, having a π-conjugated backbone and alkyl side chains substituted with carboxylate moieties, interacted with the FWNT π-electron-rich and hydroxylated sFe3O4 surfaces, whic...
Yo Han Kwon; Jung Jin Park; Lisa M. Housel; Krysten Minnici; Guoyan Zhang; Sujin R. Lee; Seung Woo Lee; Zhongming Chen; Suguru Noda; Esther S. Takeuchi; Kenneth J. Takeuchi; Amy C. Marschilok; Elsa Reichmanis
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