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Sodium naphthalene‐2,6‐dicarboxylate: an anode for sodium batteries

DOI: 10.1002/cssc.201901626 DOI Help

Authors: Joel M. Cabañero (Saint Andrews University) , Vanessa Pereira Pimenta (Saint Andrews University) , Kieran Cannon (Saint Andrews University) , Russell Morris (Saint Andrews University) , Anthony Robert Armstrong (Saint Andrews University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemsuschem

State: Published (Approved)
Published: August 2019
Diamond Proposal Number(s): 14567

Abstract: The conjugated dicarboxylate, sodium naphthalene‐2,6‐dicarboxylate (Na2NDC), has been prepared by a low energy consumption reflux method and its performance as a negative electrode for sodium‐ion batteries evaluated in electrochemical cells. The structure of Na2NDC was solved for the first time (monoclinic P21/c) from powder X‐ray diffraction data and consists of π‐stacked naphthalene units separated by sodium‐oxygen layers. Through an appropriate choice of binder and conducting carbon additive Na2NDC exhibits a reversible two electron sodium insertion at around 0.4 V vs. Na+/Na with remarkably stable capacities of ca. 200 mA h g‐1 at a rate of C/2 and good rate capability (~133 mA h g‐1 at 5C). In parallel the high thermal stability of the material is demonstrated by HT‐X‐ray diffraction, the framework remaining intact to above 500 °C.

Journal Keywords: sodium-ion batteries negative electrodes ab initio structure solution

Subject Areas: Chemistry, Materials

Instruments: I11-High Resolution Powder Diffraction