Ji[David]XiuleiChemistrySuperiorCathodeSodium.pdf

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/cf95jh21h

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Creator	Raju, Vadivukarasi Rains, Jordan Gates, Cooper Luo, Wei Wang, Xingfeng Stickle, William F. Stucky, Galen D. Ji, Xiulei
Abstract	We, for the first time, demonstrate that orthorhombic V₂O₅ can exhibit superior electrochemical performance in sodium ion batteries when uniformly coated inside nanoporous carbon. The encapsulated V₂O₅ shows a specific capacity as high as 276 mAh/g, while the whole nanocomposite exhibits a capacity of 170 mAh/g. The V₂O₅/C composite was fabricated by a novel ambient hydrolysis deposition that features sequential water vapor adsorption in nanoporous carbon, followed by a hydrolysis reaction, exclusively inside the nanopores. The unique structure of the nanocomposite significantly enhances the capacity as well as the rate performance of orthorhombic V₂O₅ where the composite retains a capacity of over 90 mAh/g at a current rate of 640 mA/g. Furthermore, by calculating, we also revealed that a large portion of the sodium-ion storage, particularly at high current rates, is due to the V₂O₅ pseudocapacitance. Keywords: Sodium-Ion Batteries, Orthorhombic V₂O₅, Pseudocapacitance, Ambient Hydrolysis Deposition Keywords: Sodium-Ion Batteries, Orthorhombic V₂O₅, Pseudocapacitance, Ambient Hydrolysis Deposition
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