Abstract
Herein, silicon nanoparticles (SiNPs) are coated with conducting hydrogel and wrapped with reduced graphene oxide (rGO) sheets via a facile and scalable solution-based sol-gel process. The in-situ polymerized polypyrrole (PPy) hydrogel forms an interconnected three-dimensional (3D) fiber matrix. Amine and hydroxyl groups from the hydrogel assist the encapsulation of the SiNPs through hydrogen bonding. The electro-conductive PPy fiber network and the wrapping of rGO offer efficient electron and ion transport pathways. The PPy/SiNPs/rGO electrodes can produce highly reversible capacities of 1312, 1285 and 1066 mAh g-1 at 100, 250 and 500 cycles at a current density of 2.1 A g-1, respectively.
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Li, C., Liu, C., Mutlu, Z. et al. Silicon/polypyrrole nanocomposite wrapped with graphene for lithium ion anodes. MRS Advances 2, 3323–3327 (2017). https://doi.org/10.1557/adv.2017.409
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DOI: https://doi.org/10.1557/adv.2017.409