Coherent V4+-rich V2O5/carbon aerogel nanocomposites for high performance supercapacitors
نویسندگان
چکیده
V4+-rich V2O5/carbon aerogel (V4+-V2O5/CA) composites were synthesized as electrode materials for supercapacitors via in-situ hydrolysis-condensation processing. Carbon (CA) promotes the deposition of amorphous vanadium oxide and catalyzes crystallization V2O5 nanosheets at much reduced temperature. With a uniform distribution in CA, special structure provides large specific area reactive sites. CA also synergistically improves electrical conductivity structural integrity. In addition, rich V4+ would enhance intrinsic V2O5, promote ion diffusion catalyze electrochemical reactions. Consequently, V4+−V2O5/CA exhibits enhanced capacitance (405 F g−1 0.5 A g−1), high energy density (56 W h kg−1 with power 250 kg−1) long cycle life (96% retention after 40,000 cycles).
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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2022
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1944-9