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Title: Carbon Nanotube Web with Carboxylated Polythiophene “Assist” for High-Performance Battery Electrodes

Journal Article · · ACS Nano
 [1];  [2];  [3];  [1];  [1];  [4];  [5];  [6]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [7]; ORCiD logo [9]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemical and Biomolecular Engineering
  2. Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (Korea, Republic of). Dept. of Chemical and Biomolecular Engineering
  3. Stony Brook Univ., NY (United States). Dept. of Chemistry
  4. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemistry and Biochemistry
  5. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Mechanical Engineering
  6. Waseda Univ., Tokyo (Japan). Dept. of Applied Chemistry
  7. Stony Brook Univ., NY (United States). Dept. of Chemistry. Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
  8. Stony Brook Univ., NY (United States). Dept. of Chemistry. Dept. of Materials Science and Chemical Engineering
  9. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemical and Biomolecular Engineering. Dept. of Chemistry and Biochemistry. Dept. of Materials Science and Engineering

In this paper, 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, which enabled the formation of effective electrical bridges between the respective components, contributing to efficient electron transport and electrode stability. To further induce interactions between PPBT and the metal hydroxide surface, polyethylene glycol was coated onto the sFe3O4 particles, allowing for facile materials dispersion and connectivity. Additionally, the introduction of carbon particles into the web electrode minimized sFe3O4 aggregation and afforded more porous FWNT networks. Finally, as a consequence, the design of composite electrodes with rigorous consideration of specific molecular interactions induced by the surface chemistries favorably influenced electrochemical kinetics and electrode resistance, which afforded high-performance electrodes for battery applications.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2mt); Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States); Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0012673; AC02-06CH11357
OSTI ID:
1460699
Report Number(s):
BNL-207834-2018-JAAM
Journal Information:
ACS Nano, Vol. 12, Issue 4; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Thin-Film Electrode Design for High Volumetric Electrochemical Performance Using Metal Sputtering-Combined Ligand Exchange Layer-by-Layer Assembly journal October 2018
Structure Design and Composition Engineering of Carbon‐Based Nanomaterials for Lithium Energy Storage journal March 2020
Scalable Synthesis of an Artificial Polydopamine Solid‐Electrolyte‐Interface‐Assisted 3D rGO/Fe 3 O 4 @PDA Hydrogel for a Highly Stable Anode with Enhanced Lithium‐Ion‐Storage Properties journal January 2019
Polythiophene Grafted onto Single‐Wall Carbon Nanotubes through Oligo(ethylene oxide) Linkages for Supercapacitor Devices with Enhanced Electrochemical Performance journal August 2019

Figures / Tables (8)