화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.57, 284-289, January, 2018
High-performance Li-ion hybrid supercapacitors based on microporous pyropolymer nanoplates and orthorhombic Nb2O5 nanocomposites
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In this study, high-performance Li-ion hybrid supercapacitors (LIHSs) were realized by the sophisticated design of nanostructured electrode pairs demonstrating both energy and kinetic balance. Microporous pyroprotein nanoplates (M-PNPs) were fabricated by a controlled pyrolysis process using potassium hydroxide, to achieve high electrochemical performance in the cathodic voltage region of 2.0-4.5 V vs. Li+/Li. M-PNP/T-Nb2O5 nanocomposites obtained by introducing niobium oxide (T-Nb2O5) nanoparticles on the surface of M-PNP also showed outstanding Li-ion storage kinetics in the anodic voltage range of 1.0-2.0 vs. Li+/Li. The LIHSs based on M-PNP and M-PNP/T-Nb2O5 nanocomposite samples used as the cathode and anode pair, respectively, exhibited a high specific energy of ~47.5 W h kg-1 at ~280.0 W kg-1 and a high specific power of ~10,000 W kg-1 at ~22.3 W h kg-1 with excellent cycling stability over 30,000 cycles.
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