Lithium-ion capacitors using carbide-derived carbon as the positive electrode – A comparison of cells with graphite and Li4Ti5O12 as the negative electrode

Taina Rauhala, Jaan Leis, Tanja Kallio, Kai Vuorilehto

    Research output: Contribution to journalArticleScientificpeer-review

    30 Citations (Scopus)
    150 Downloads (Pure)

    Abstract

    The use of carbide-derived carbon (CDC) as the positive electrode material for lithium-ion capacitors (LICs) is investigated. CDC based LIC cells are studied utilizing two different negative electrode materials: graphite and lithium titanate Li4Ti5O12 (LTO). The graphite electrodes are prelithiated before assembling the LICs, and LTO containing cells are studied with and without prelithiation. The rate capability and cycle life stability during 1000 cycles are evaluated by galvanostatic cycling at current densities of 0.4–4 mA cm−2. The CDC shows a specific capacitance of 120 F g−1 in the organic lithium-containing electrolyte, and the LICs demonstrate a good stability over 1000 charge-discharge cycles. The choice of the negative electrode is found to have an effect on the utilization of the CDC positive electrode during cycling and on the specific energy of the device. The graphite/CDC cell delivers a maximum specific discharge energy of 90 Wh kg−1 based on the total mass of active material in the cell. Both the prelithiated and non-prelithiated LTO/CDC cells show a specific energy of around 30 Wh kg−1.
    Original languageEnglish
    Pages (from-to)156-166
    Number of pages11
    JournalJournal of Power Sources
    Volume331
    DOIs
    Publication statusPublished - 16 Sep 2016
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Carbide-derived carbon; Lithium titanate; Graphite; Hybrid supercapacitor; Lithium-ion capacitor; Asymmetric capacitor

    Fingerprint Dive into the research topics of 'Lithium-ion capacitors using carbide-derived carbon as the positive electrode – A comparison of cells with graphite and Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> as the negative electrode'. Together they form a unique fingerprint.

    Cite this