Xing Shen1,2, Quan Zhou3, Miao Han3, Xingguo Qi3, Bo Li1, Qiangqiang Zhang3, Junmei Zhao4,5,6, Chao Yang1, Huizhou Liu1, Yong-Sheng Hu7. 1. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China. 2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China. 3. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. 4. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China. jmzhao@ipe.ac.cn. 5. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China. jmzhao@ipe.ac.cn. 6. Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, China. jmzhao@ipe.ac.cn. 7. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. yshu@iphy.ac.cn.
Abstract
Na-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemical performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g-1 at 0.1C, higher than its theoretical capacity (130 mAh g-1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.
Na-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemicpan class="Chemical">al performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g-1 at 0.1C, higher than its theoretical capacity (130 mAh g-1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.
Authors: Stuart L James; Christopher J Adams; Carsten Bolm; Dario Braga; Paul Collier; Tomislav Friščić; Fabrizia Grepioni; Kenneth D M Harris; Geoff Hyett; William Jones; Anke Krebs; James Mack; Lucia Maini; A Guy Orpen; Ivan P Parkin; William C Shearouse; Jonathan W Steed; Daniel C Waddell Journal: Chem Soc Rev Date: 2011-09-05 Impact factor: 54.564