Water soluble binder for fabrication of Li4Ti5O12 electrodes

Elina Pohjalainen, Samuli Räsänen, Miikka Jokinen, Kirsi Yliniemi, David A. Worsley, Juha Kuusivaara, Jouni Juurikivi, Risto Ekqvist, Tanja Kallio, Maarit Karppinen

    Research output: Contribution to journalArticleScientificpeer-review

    32 Citations (Scopus)
    332 Downloads (Pure)

    Abstract

    Less expensive and greener aqueous electrode preparation processes are essential for the market penetration of lithium ion batteries to mid-scale applications. So far only carboxyl methyl cellulose (CMC) binder has been adopted for industrial use to fabricate carbon electrodes without harmful organic solvents but this process is prone to bacterial growth.
    In this study a new binder candidate, Acryl S020, is introduced for an aqueous preparation process that has been used for preparing Li4Ti5O12 electrodes for lithium ion batteries. It is shown that with our water based process electrodes with capacities comparable to those electrodes fabricated with the conventional organic solvent based process with the PVDF binder are obtained. Moreover, our lithium titanate electrodes with the Acryl S020 binder show high capacity retention and they can be operated at sub-zero temperatures. Electrodes were also fabricated with pilot-scale gravure printing and slot-die coating methods and they showed stable cycles lives of 500 cycles.
    Original languageEnglish
    Pages (from-to)134-139
    Number of pages6
    JournalJournal of Power Sources
    Volume226
    DOIs
    Publication statusPublished - 15 Mar 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Li-ion battery; Lithium titanate; Acrylate; Aqueous electrode preparation process
    • Lithium titanate
    • Acrylate
    • Aqueous electrode preparation process

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