Title

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

Authors

Authors

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

Comments

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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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