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Rice husk-derived nano-SiO assembled on reduced graphene oxide distributed on conductive flexible polyaniline frameworks towards high-performance lithium-ion batteries

By combining rice husk-derived nano-silica and reduced graphene oxide and then polymerizing PANI by in situ polymerization, we created polyaniline-coated rice husk-derived nano-silica@reduced graphene oxide (PANI-SiO 2 @rGO) composites with excellent electrochemical performance. ATR-FTIR and XRD ana...

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Bibliographic Details
Published in:RSC advances 2022-05, Vol.12 (23), p.14621-1463
Main Authors: Ratsameetammajak, Natthakan, Autthawong, Thanapat, Chairuangsri, Torranin, Kurata, Hiroki, Yu, Ai-shui, Sarakonsri, Thapanee
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Summary:By combining rice husk-derived nano-silica and reduced graphene oxide and then polymerizing PANI by in situ polymerization, we created polyaniline-coated rice husk-derived nano-silica@reduced graphene oxide (PANI-SiO 2 @rGO) composites with excellent electrochemical performance. ATR-FTIR and XRD analyses confirm the formation of PANI-SiO 2 @rGO, implying that SiO 2 @rGO served as a template in the formation of composites. The morphology of PANI-SiO 2 @rGO was characterized by SEM, HRTEM, and STEM, in which SiO 2 nanoparticles were homogeneously loaded on graphene sheets and the PANI fibrous network uniformly covers the SiO 2 @rGO composites. The structure can withstand the large volume change as well as retain electronic conductivity during Li-ion insertion/extraction. Over 400 cycles, the assembled composite retains a high reversible specific capacity of 680 mA h g −1 at a current density of 0.4 A g −1 , whereas the SiO 2 @rGO retains only 414 mA h g −1 at 0.4 A g −1 after 215 cycles. The enhanced electrochemical performance of PANI-SiO 2 @rGO was a result of the dual protection provided by the PANI flexible layer and graphene sheets. PANI-SiO 2 @rGO composites may pave the way for the development of advanced anode materials for high-performance lithium-ion batteries. By combining rice husk-derived nano-silica and reduced graphene oxide and then polymerizing PANI by in situ polymerization, we created polyaniline-coated rice husk-derived nano-silica@reduced graphene oxide composites with excellent electrochemical performance.
ISSN:2046-2069
DOI:10.1039/d2ra00526c