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Electron/Ion Transport Enhancer in High Capacity Li-Ion Battery Anodes

Journal Article · · Chemistry of Materials
 [1];  [1];  [2];  [3];  [4];  [3];  [5]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemical and Biomolecular Engineering
  2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  3. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering. Dept. of Chemistry
  4. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering. Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
  5. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemical and Biomolecular Engineering. Dept. of Chemical and Biochemistry. Dept. of Materials Science and Engineering
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In this paper, magnetite (Fe3O4) was used as a model high capacity metal oxide active material to demonstrate advantages derived from consideration of both electron and ion transport in the design of composite battery electrodes. The conjugated polymer, poly[3-(potassium-4-butanoate) thiophene] (PPBT), was introduced as a binder component, while polyethylene glycol (PEG) was coated onto the surface of Fe3O4 nanoparticles. The introduction of PEG reduced aggregate size, enabled effective dispersion of the active materials and facilitated ionic conduction. As a binder for the composite electrode, PPBT underwent electrochemical doping which enabled the formation of effective electrical bridges between the carbon and Fe3O4 components, allowing for more efficient electron transport. Additionally, the PPBT carboxylic moieties effect a porous structure, and stable electrode performance. Finally, the methodical consideration of both enhanced electron and ion transport by introducing a carboxylated PPBT binder and PEG surface treatment leads to effectively reduced electrode resistance, which improved cycle life performance and rate capabilities.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States); Georgia Inst. of Technology, Atlanta, GA (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF) (United States)
Grant/Contract Number:
SC0012673
OSTI ID:
1341669
Report Number(s):
BNL--113396-2016-JA
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 18 Vol. 28; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Re‐Engineering Poly(Acrylic Acid) Binder toward Optimized Electrochemical Performance for Silicon Lithium‐Ion Batteries: Branching Architecture Leads to Balanced Properties of Polymeric Binders journal December 2019
Nanostructured Functional Hydrogels as an Emerging Platform for Advanced Energy Technologies journal August 2018
Ionically Conductive Self-Healing Binder for Low Cost Si Microparticles Anodes in Li-Ion Batteries journal February 2018
Enhanced cyclability of silicon anode via synergy effect of polyimide binder and conductive polyacrylonitrile journal March 2019
Size dependent behavior of Fe 3 O 4 crystals during electrochemical (de)lithiation: an in situ X-ray diffraction, ex situ X-ray absorption spectroscopy, transmission electron microscopy and theoretical investigation journal January 2017
Synthesis of triblock copolymer polydopamine-polyacrylic-polyoxyethylene with excellent performance as a binder for silicon anode lithium-ion batteries journal January 2018
Fe 3 O 4 @Ti 3 C 2 MXene hybrids with ultrahigh volumetric capacity as an anode material for lithium-ion batteries journal January 2018

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Related Subjects

25 ENERGY STORAGE
Electron
Ion Transport Enhancer
Li-Ion Battery
battery
composite