Silicon/polypyrrole nanocomposite wrapped with graphene for lithium ion anodes
| Autor: | Cengiz S. Ozkan, Yiran Yan, Mihri Ozkan, Kazi Ahmed, Zafer Mutlu, Chueh Liu, Changling Li |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Silicon Oxide chemistry.chemical_element Nanoparticle 02 engineering and technology 010402 general chemistry Polypyrrole 01 natural sciences law.invention chemistry.chemical_compound law General Materials Science Composite material chemistry.chemical_classification Nanocomposite Graphene Mechanical Engineering Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials Lithium 0210 nano-technology |
| Zdroj: | MRS Advances. 2:3323-3327 |
| ISSN: | 2059-8521 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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