Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 31, Pages 17044-17053Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b03210
Keywords
ammonium vanadate; ab initio modeling study; cyclic stability; power performance; sodium ion battery cathode
Funding
- U.S.-India Partnership to Advance Clean Energy-Research (PACE-R) for the Solar Energy Research Institute for India and the United States (SERIIUS)
- National Centre for Photovoltaic Research and Education (NCPRE)-Ministry of New and Renewable Energy
- U.S. Department of Energy (Office of Science, Office of Basic Energy Sciences, and Energy Efficiency and Renewable Energy, Solar Energy Technology Program) [DE-AC36-08GO28308]
- Government of India through the Department of Science and Technology under IUSSTF/JCERDC-SERIIUS
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Sodium-ion battery (NIB) cathode performance based on ammonium vanadate is demonstrated here as having high capacity, long cycle life and good rate capability. The simple preparation process and morphology study enable us to explore this electrode as suitable NIB cathode. Furthermore, density functional theory (DFT) calculation is envisioned for the NH4V4O10 cathode, and three possible sodium arrangements in the structure are depicted for the first time. Relevant NIB-related properties such as average voltage, lattice constants, and atomic coordinates have been derived, and the estimated values are in good agreement with the current experimental values. A screening study shows ammonium vanadate electrodes prepared on carbon coat onto Al-current collector exhibits a better electrochemical performance toward sodium, with a sustained reversible capacity and outstanding rate capability. With the current cathode with nanobelt morphology, a reversible capacity of 190 mAh g(-1) is attained at a charging rate of 200 mA g(-1) and a stable capacity of above 120 mAh g(-1) is retained for an extended 50 cycles tested at 1000 mA g(-1) without the addition of any expensive electrolyte additive.
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