Novel Polygonal Vanadium Oxide Nanoscrolls as Stable Cathode for Lithium Storage |
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| Authors: | Qiulong Wei Shuangshuang Tan Xiaoyi Liu Mengyu Yan Fengchao Wang Qidong Li Qinyou An Ruimin Sun Kangning Zhao Hengan Wu Liqiang Mai |
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| Affiliation: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT‐Harvard Joint Nano Key Laboratory, Wuhan University of Technology, Hubei, Wuhan, China;2. CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui, China;3. Cullen College of Engineering, Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA |
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| Abstract: | Scroll‐shape structures with adjustable space provide interlayer sliding to accommodate the volume changes, which are promising candidates for increasing the stability of lithium batteries (LBs). In this work, for the first time, novel vanadium oxide polygonal nanoscrolls (PNSs) are synthesized in solution through self‐rolling, Ostwald ripening, and scroll‐by‐scroll processes. The PNSs are of various shapes (including triangle, quadrangle, pentagon, and so forth) and spiral‐wrapped multiwall. When evaluated as cathode for LB, the vanadium oxide PNSs cathode exhibits largely enhanced cycling stability (capacity retention of 91.7% after 150 cycles at 0.1 A g–1 in 2.0–4.0 V) compared with those of nonscrolled nanobelts (40.0%) and nanowires (35.8%). Even at 1.0 A g–1, the PNSs cathode delivers high‐rate long‐life performance with capacity retention of 80.6% after 500 cycles. The unique polygonal nanoscroll structure is favorable for improving the cyclability and rate capability in energy storage applications as demonstrated here, and it will be interesting and has great potential for other related applications. |
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| Keywords: | inorganic scrolls lithium battery nanostructure polygonal nanoscrolls vanadium oxide |
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