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    Incorporation of aniline tetramer into alginate-grafted-polyacrylamide as polymeric binder for high-capacity silicon/graphite anodes

    Year: 2022

    Journal: Chem. Eng. J., Volume 433, APR 1

    Authors: Gendensuren, Bolormaa; Sugartseren, Nyambayar; Kim, Moongi; Oh, Eun-Suok

    Organizations: National Research Foundation of Korea - Ministry of Science and ICT(MSIT) [NRF-2019R1A2C1004593]; Industrial Strategic Technology Development Program - Ministry of Trade, Industry and Energy (MOTIE, Korea) [20009866]

    Keywords: Silicon; Graphite; Aniline tetramer; Acrylamide; Graft copolymer

    Progress in the performance of high-capacity silicon anodes has been made with a variety of material designs. In this study, a new design on polymeric binder is proposed for the high-capacity anodes. The effective addition of conductive aniline oligomers to adhesive alginate-graft-polyacrylamide binder improves the performance of the silicon/graphite composite electrodes. To do this, three-step in situ polymerization is adopted to synthesize adhesive and conductive alginate-graft-poly(acrylamide-co-acrylamide aniline tetramer). A small amount of aniline tetramer added to the binder, of 1.25 wt%, is enough to enhance electronic and ionic transport through the silicon-based anode, while maintaining electrode adhesion. Consequently, the silicon/graphite electrode containing the alginate-graft-poly(acrylamide-co-acrylamide aniline tetramer) binder shows 701.2 mAh g(-1) after 200 cycles with excellent cyclic stability. This is significantly greater performance than that of the commercial graphite electrodes.
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