Title

Adhesive Peg-Based Binder For Aqueous Fabrication Of Thick Li 4Ti5O12 Electrode

Keywords

Aqueous process; Binder; Li Ti O 4 5 12; Lithium-ion batteries; Water-soluble

Abstract

We report the first fully compressed Li4Ti5O 12 electrode designed by an aqueous process. An adhesive, elastomeric, and lithium ion conductive PEG-based copolymer is used as a binder for the aqueous fabrication thick, flexible, and densely packed Li 4Ti5O12 (LTO) electrodes. Self-adherent cathode films exceeding 200 μm in thickness and withholding high active mass loadings of 28 mg/cm2 deliver 4.2 mAh/cm2 at C/2 rate. Structurally defect-free electrodes are fabricated by casting aqueous cathode slurries onto nickel foam, dried, and hard-calendared at 10 tons/cm2. As a multifunctional material, the binder is synthesized by the copolymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMA), methyl methacrylate (MMA), and isobutyl vinyl ether (IBVE) in optimal proportions. Furthermore, coordinating the binder with lithium salt is necessary for the electrode to function. © 2012 Elsevier Ltd. All rights reserved.

Publication Date

1-15-2013

Publication Title

Electrochimica Acta

Volume

88

Number of Pages

536-542

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.electacta.2012.10.139

Socpus ID

84870724371 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84870724371

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