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- W2143812429 abstract "V2O5 xerogel films were fabricated by casting V2O5 sols onto FTO glass substrates and annealing at 300 °C for 3 hours in nitrogen and air. The films annealed in nitrogen and air possessed different grain size and crystallinity. Optical absorption measurements and electrochemical impedance analyses revealed a reduced optical bandgap and enhanced electrical conductivity of N2 annealed V2O5 film. Lithium ion intercalation measurements showed that at a charge/discharge current density of 600 mAg−1, the N2 annealed sample possessed noticeably better lithium ion storage capability. In contrast to the air annealed sample, which started with a discharge capacity of 152 mAhg−1 but after 50 cycles the capacity had decreased to a low value of only 44 mAhg−1, the N2 annealed sample started with a low value of 68 mAhg−1 but the capacity increased sharply to a high value of 158 mAhg−1 at the 24th cycle, followed by little capacity degradation in later cycles and after 50 cycles, the discharge capacity was still as high as 148 mAhg−1. Much improved lithium ion intercalation capacity and cyclic stability could be attributed to surface defects V4+ and/or V3+ and associated oxygen vacancies introduced by N2annealing as well as much less crystallized vanadium oxide." @default.
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- W2143812429 date "2009-01-01" @default.
- W2143812429 modified "2023-10-18" @default.
- W2143812429 title "V2O5 xerogel electrodes with much enhanced lithium-ion intercalation properties with N2 annealing" @default.
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- W2143812429 doi "https://doi.org/10.1039/b914436f" @default.
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