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Rechargeable Sodium-Ion Battery: High-Capacity Ammonium Vanadate Cathode with Enhanced Stability at High Rate

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Title Rechargeable Sodium-Ion Battery: High-Capacity Ammonium Vanadate Cathode with Enhanced Stability at High Rate
 
Creator SARKAR, A
SARKAR, S
SARKAR, T
KUMAR, P
BHARADWAJ, MD
MITRA, S
 
Subject ELECTROCHEMICAL PERFORMANCE
VANADIUM-OXIDE
INTERCALATION
TRANSITION
MORPHOLOGY
CHEMISTRY
NANOBELTS
NANORODS
LIFEPO4
ammonium vanadate
ab initio modeling study
cyclic stability
power performance
sodium ion battery cathode
 
Description 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.
 
Publisher AMER CHEMICAL SOC
 
Date 2016-01-15T06:18:29Z
2016-01-15T06:18:29Z
2015
 
Type Article
 
Identifier ACS APPLIED MATERIALS & INTERFACES, 7(31)17044-17053
1944-8244
http://dx.doi.org/10.1021/acsami.5b03210
http://dspace.library.iitb.ac.in/jspui/handle/100/17913
 
Language en