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Sodium-ion batteries present and future

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Sodium-ion batteries present and future ( sodium-ion-batteries-present-and-future )

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Chem Soc Rev Review Article Fig. 19 (a) Crystal structure of Monoclinic sodium-based metal fluorosulphates and (b) the electrochemical voltage profile of NaFeSO4F cycled in a sodium cell with a metallic Na anode and a 1 M Na-TFSI : PC electrolyte at a rate of C/20. (Reproduced with permission from ref. 217, Copyright 2010 American Chemical Society.) (c) Crystal structure of Na2Fe2(SO4)3 projected along the c-axis and (d) galvanostatic charging and discharging profiles of the Na2􏰣xFe2(SO4)3 cathode cycled between 2.0 and 4.5 V at a rate of C/20 (2 Na in 20 h) at 25 1C. First (1st) cycle is shown in dashed black line, and 2nd–5th cycle in solid black lines. (inset) The differential galvanostatic profiles (dQ/dV) of the Na2Fe2(SO4)3 cathode. (Reproduced by permission from ref. 219, Nature Publishing Group, Copyright 2014.) (e) The structure of Na3MnPO4CO3 viewed along [001]: Mn octahedra, brown; PO4 tetrahedra, blue; CO3 triangular planar, black; sodium, green (Na1 site) and yellow (Na2site) spheres and (f) the resulting voltage curves of Na3MnPO4CO3 at the first, second, and 10th cycles with a C/100 rate. (Reproduced with permission from ref. 221, Copyright 2013 American Chemical Society.) View Article Online Organic molecules can undergo a reversible electrochemical redox reaction. The advantages of such a reaction are struc- tural diversity, flexibility, molecular level controllability, and resource renewability.232–235 Recently, Wang et al. reported the electrochemical performance of 2,5-dihydroxyterephthalic acid (Na4DHTPA), Na2C8H2O6, with enolate and carboxylate groups Thisjournalis©TheRoyalSocietyofChemistry2017 Chem.Soc.Rev.,2017,46,3529--3614 | 3559 Open Access Article. Published on 28 March 2017. Downloaded on 7/1/2019 3:41:21 AM. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

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