Journal
CHEMSUSCHEM
Volume 7, Issue 2, Pages 407-411Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201301036
Keywords
aqueous electrolyte; electrochemistry; energy storage; intercalation chemistry; sodium-ion batteries
Funding
- National Natural Science Foundation of China [21303125, 21333007]
- Specialized Research Fund for the Doctoral Program of Higher Education [20130141120007]
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Aqueous rechargeable sodium-ion batteries have the potential to meet growing demand for grid-scale electric energy storage because of the widespread availability and low cost of sodium resources. In this study, we synthesized a Na-rich copper hexacyanoferrate(II) Na2CuFe(CN)(6) as a high potential cathode and used NaTi2(PO4)(3) as a Na-deficient anode to assemble an aqueous sodium ion battery. This battery works very well with a high average discharge voltage of 1.4 V, a specific energy of 48 Wh kg(-1), and an excellent high-rate cycle stability with approximately 90% capacity retention over 1000 cycles, achieving a new record in the electrochemical performance of aqueous Na-ion batteries. Moreover, all the anode, cathode, and electrolyte materials are low cost and naturally abundant and are affordable for widespread applications.
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