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NASICON-type Air-stable and All-climate Cathode for Sodium-ion Batteries with Low Cost and High-power Density

Overview
Journal Nat Commun
Specialty Biology
Date 2019 Apr 2
PMID 30931938
Citations 15
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Abstract

The development of low-cost and long-lasting all-climate cathode materials for the sodium ion battery has been one of the key issues for the success of large-scale energy storage. One option is the utilization of earth-abundant elements such as iron. Here, we synthesize a NASICON-type tuneable NaFe(PO)(PO)/C nanocomposite which shows both excellent rate performance and outstanding cycling stability over more than 4400 cycles. Its air stability and all-climate properties are investigated, and its potential as the sodium host in full cells has been studied. A remarkably low volume change of 4.0% is observed. Its high sodium diffusion coefficient has been measured and analysed via first-principles calculations, and its three-dimensional sodium ion diffusion pathways are identified. Our results indicate that this low-cost and environmentally friendly NaFe(PO)(PO)/C nanocomposite could be a competitive candidate material for sodium ion batteries.

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