Ethylene glycol-regulated ammonium vanadate with stable layered structure and favorable interplanar spacing as high-performance cathode for aqueous zinc ion batteries |
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| Institution: | 1. School of Mechanical Engineering, Chengdu University, Chengdu 610106, China;2. Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, China;3. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China;4. College of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China;1. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;2. Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland;3. State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;1. School of New Energy, North China Electric Power University, Beijing 102206, China;2. College of Electronics and Information, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China;3. Department of Physics, Dongguk University, Seoul 04620, Republic of Korea;1. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi''an 710127, China;2. Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Biomedicine Key Laboratory of Shaanxi Province, Lab of Tissue Engineering, College of Life Sciences, Northwest University, Xi''an 710127, China;3. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi''an 710127, China |
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| Abstract: | Ammonium vanadate compounds featuring large capacity, superior rate capability and light weight are regarded as promising cathode materials for aqueous zinc ion batteries (AZIBs). However, the controllable synthesis of desired ammonium vanadates remains a challenge. Herein, various ammonium vanadate compounds were successfully prepared by taking advantage of ethylene glycol (EG) regulated polyol-reduction strategy and solvent effect via hydrothermal reaction. The morphology and crystalline phase of resultant products show an evolution from dendritic (NH4)2V6O16 to rod-like NH4V4O10 and finally to lamellar (NH4)2V4O9 as increasing the amount of EG. Specifically, the NH4V4O10 product exhibits a high initial capacity of 427.5 mAh/g at 0.1 A/g and stable cycling with a capacity retention of 90.4% after 5000 cycles at 10 A/g. The relatively excellent electrochemical performances of NH4V4O10 can be ascribed to the stable open-framework layered structure, favorable (001) interplanar spacing, and peculiar rod-like morphology, which are beneficial to the highly reversible Zn2+ storage behaviors. This work offers a unique way for the rational design of high-performance cathode materials for AZIBs. |
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