2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 12: Energy Production and Secondary Batterie

Editors:F. Kongoli, H. Dodds, M. Mauntz, T. Turna, K. Aifantis, A. Fox, V. Kumar
Publisher:Flogen Star OUTREACH
Publication Year:2019
Pages:112 pages
ISBN:978-1-989820-11-7
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Novel Carbon - Ultrafine Silicon Composite Anode for High-Performance Lithium-Ion Batteries

    Dmitry Yarmolich1; Dzianis Yarmolich2; Yaroslav Odarchenko3; Carmen Murphy4; Enrico Petrucco4; Vasant Kumar5; Rumen Tomov5;
    1PLASMA APP LTD, OX11 0QX, United Kingdom; 2PLASMA APP LTD, Oxford , OX11 0QX, United Kingdom; 3PLASMA APP LTD, Oxford OX11 0QX, United Kingdom; 4JOHNSON MATTHEY BATTERY MATERIALS, Reading RG4 9NH, United Kingdom; 5UNIVERSITY OF CAMBRIDGE, Cambridge, United Kingdom;
    Type of Paper: Regular
    Id Paper: 352
    Topic: 14

    Abstract:

    Silicon (Si) has been widely considered as potential high capacity anode material in Li-ion batteries due to its desirable properties: (i) high theoretical specific capacity (1672 mA h g-1), (ii) nontoxicity and (iii) low cost and natural abundance [1]. Despite its favourable comparison to commercial graphite anodes (theoretical capacity of 372 mA h g-1), the implementation of bulk Si anode has been hindered by the large volume change during the charging and discharging cycle (~ 300%). Such structural instability results in loss of contact with the other electrode constituents and self-destruction [2]. Another adverse feature is the limited Li+ ion diffusivity and electronic conductivity of bulk Si at room temperature.
    A scalable method of producing carbon (ultrafine silicon composite electrode) was developed using the Virtual Cathode Deposition technique [3]. As-deposited coatings contained silicon nano-crystallites encapsulated in a novel polymorph of mesoporous disordered carbon matrix. The architecture of the electrode offers close-order integration of both materials ensuring fast Li+ ion diffusivity and mixed-(ionic/electronic) conductivity as well as alleviating Si volume change during cycling. The composite carbon polymorph-silicon anode tested versus Li displayed a first cycle specific capacity of more than 2000 mAh g-1 retaining in the following cycles ~1200 mAh g-1 at a 0.1C rate. The good cyclability (over 80 cycles) demonstrated the effectiveness of such Si - carbon encapsulation, addressing the instability issues of Si-based anodes.

    Keywords:

    Anodes; Electrochemistry; Li-Ion; SecondaryBattery;

    References:

    [1] P. G. Bruce, S. A. Freunberger, L. J. Hardwick and J. M. Tarascon, Nat. Mater., 2012, 11, 19–29.
    [2] Li B, Xiao Q, Luo Y (2018) A modified synthesis process of three dimensional sulfur/graphene aerogel as binder-free cathode for lithium-sulfur batteries. Mater Des 153:9–14
    [3] D. Yarmolich, D. Virtual cathode deposition (vcd) for thin film manufacturing WO2016042530A1. (2015).

    Cite this article as:

    Yarmolich D, Yarmolich D, Odarchenko Y, Murphy C, Petrucco E, Kumar V, Tomov R. (2019). Novel Carbon - Ultrafine Silicon Composite Anode for High-Performance Lithium-Ion Batteries. In F. Kongoli, H. Dodds, M. Mauntz, T. Turna, K. Aifantis, A. Fox, V. Kumar (Eds.), Sustainable Industrial Processing Summit SIPS2019 Volume 12: Energy Production and Secondary Batterie (pp. 37-38). Montreal, Canada: FLOGEN Star Outreach