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      Graphene-Supported NaTi2(PO4)3as a High Rate Anode Material for Aqueous Sodium Ion Batteries

      , , , , , , ,
      Journal of The Electrochemical Society
      The Electrochemical Society

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          Na-ion batteries, recent advances and present challenges to become low cost energy storage systems

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            Raising the cycling stability of aqueous lithium-ion batteries by eliminating oxygen in the electrolyte.

            Aqueous lithium-ion batteries may solve the safety problem associated with lithium-ion batteries that use highly toxic and flammable organic solvents, and the poor cycling life associated with commercialized aqueous rechargeable batteries such as lead-acid and nickel-metal hydride systems. But all reported aqueous lithium-ion battery systems have shown poor stability: the capacity retention is typically less than 50% after 100 cycles. Here, the stability of electrode materials in an aqueous electrolyte was extensively analysed. The negative electrodes of aqueous lithium-ion batteries in a discharged state can react with water and oxygen, resulting in capacity fading upon cycling. By eliminating oxygen, adjusting the pH values of the electrolyte and using carbon-coated electrode materials, LiTi(2)(PO(4))(3)/Li(2)SO(4)/LiFePO(4) aqueous lithium-ion batteries exhibited excellent stability with capacity retention over 90% after 1,000 cycles when being fully charged/discharged in 10 minutes and 85% after 50 cycles even at a very low current rate of 8 hours for a full charge/discharge offering an energy storage system with high safety, low cost, long cycling life and appropriate energy density.
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              Fast Na+-ion transport in skeleton structures

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                Author and article information

                Journal
                Journal of The Electrochemical Society
                J. Electrochem. Soc.
                The Electrochemical Society
                0013-4651
                1945-7111
                April 24 2014
                2014
                May 20 2014
                2014
                : 161
                : 6
                : A1181-A1187
                Article
                10.1149/2.0081409jes
                58bcd102-e7dd-4d37-b6d0-37a7251e20d1
                © 2014
                History

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