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      Ultrafast Na intercalation chemistry of Na 2Ti 3/2Mn 1/2(PO 4) 3 nanodots planted in a carbon matrix as a low cost anode for aqueous sodium-ion batteries

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          Abstract

          Na 2Ti 3/2Mn 1/2(PO 4) 3 nanodots planted in a carbon matrix were reported as a novel anode for aqueous sodium-ion batteries, showing ultrafast Na-intercalation chemistry.

          Abstract

          Na 2Ti 3/2Mn 1/2(PO 4) 3 nanodots uniformly planted in a carbon matrix are reported for the first time as a promising low-cost anode for aqueous sodium-ion batteries, showing ultrafast Na-intercalation chemistry with stable capacities of 78.8 mA h g −1 at 0.5C and 65.1 mA h g −1 at 10C, and a capacity retention of 93% after 200 cycles.

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          Cation-Deficient Spinel ZnMn2O4 Cathode in Zn(CF3SO3)2 Electrolyte for Rechargeable Aqueous Zn-Ion Battery.

          Rechargeable aqueous Zn-ion batteries are attractive cheap, safe and green energy storage technologies but are bottlenecked by limitation in high-capacity cathode and compatible electrolyte to achieve satisfactory cyclability. Here we report the application of nonstoichiometric ZnMn2O4/carbon composite as a new Zn-insertion cathode material in aqueous Zn(CF3SO3)2 electrolyte. In 3 M Zn(CF3SO3)2 solution that enables ∼100% Zn plating/stripping efficiency with long-term stability and suppresses Mn dissolution, the spinel/carbon hybrid exhibits a reversible capacity of 150 mAh g-1 and a capacity retention of 94% over 500 cycles at a high rate of 500 mA g-1. The remarkable electrode performance results from the facile charge transfer and Zn insertion in the structurally robust spinel featuring small particle size and abundant cation vacancies, as evidenced by combined electrochemical measurements, XRD, Raman, synchrotron X-ray absorption spectroscopy, FTIR, and NMR analysis. The results would enlighten and promote the use of cation-defective spinel compounds and trifluoromethanesulfonic electrolyte to develop high-performance rechargeable zinc batteries.
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            Aqueous rechargeable Li and Na ion batteries.

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              Rechargeable lithium batteries with aqueous electrolytes.

              Rechargeable lithium-ion batteries that use an aqueous electrolyte have been developed. Cells with LiMn(2)O(4) and VO(2)(B) as electrodes and 5 M LiNO(3) in water as the electrolyte provide a fundamentally safe and cost-effective technology that can compete with nickelcadmium and lead-acid batteries on the basis of stored energy per unit of weight.
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                Author and article information

                Contributors
                Journal
                CHCOFS
                Chemical Communications
                Chem. Commun.
                Royal Society of Chemistry (RSC)
                1359-7345
                1364-548X
                January 3 2019
                2019
                : 55
                : 4
                : 509-512
                Affiliations
                [1 ]Department of Chemistry and Chemical Engineering
                [2 ]College of Science
                [3 ]Northeast Forestry University
                [4 ]Harbin 150040
                [5 ]China
                Article
                10.1039/C8CC07668E
                23ace965-b9dc-4e1e-8346-608543ee7f92
                © 2019

                http://rsc.li/journals-terms-of-use

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