Thick LiCoO2/Nickel Foam Cathode Prepared by an Adhesive and Water-Soluble PEG-Based Copolymer Binder

    Authors

    B. Tran; I. O. Oladeji; Z. D. Wang; J. Calderon; G. Y. Chai; D. Atherton;L. Zhai

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Electrochem. Soc.

    Keywords

    LITHIUM-ION BATTERIES; ELECTROCHEMICAL PERFORMANCE; NEGATIVE ELECTRODES; COMPOSITE ELECTRODES; SECONDARY BATTERIES; POLYACRYLIC-ACID; CELL; PERFORMANCE; LICOO2 CATHODES; STABILITY; POLYMERS; Electrochemistry; Materials Science, Coatings & Films

    Abstract

    We report the first aqueous process fabrication of thick, flexible, and fully compressed lithium ion battery cathodes exceeding 200 mu m in thickness using an adhesive, elastomeric, and ionically conductive PEG-based copolymer binder. The binder was synthesized through the statistical copolymerization of poly(ethylene glycol) methyl ether methacrylates (PEGMA), methyl methacrylate (MMA), and isobutyl vinyl ether (IBVE) in optimal proportions. Using standard LiCoO2 as active material, dense and flexible cathode films can withhold active mass loadings over 30 mg/cm(2) which deliver 4.53 mAh/cm(2) with 94% capacity retention at C/2-rate. Electrodes were fabricated by casting aqueous cathode slurries onto nickel foam, followed by drying and hard calendar compression at 10 tons/cm(2). Coordinating the binder with lithium salt plays a crucial role in activating the cathode. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.035212jes] All rights reserved.

    Journal Title

    Journal of the Electrochemical Society

    Volume

    159

    Issue/Number

    12

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    A1928

    Last Page

    A1933

    WOS Identifier

    WOS:000312233500003

    ISSN

    0013-4651

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