Fig. 6: Electrochemical performance of assembled laboratory-scale iron sulfur-based Na-ion cells. | Nature Communications

Fig. 6: Electrochemical performance of assembled laboratory-scale iron sulfur-based Na-ion cells.

From: Bridging multiscale interfaces for developing ionically conductive high-voltage iron sulfate-containing sodium-based battery positive electrodes

Fig. 6

a Schematic representation of the FeS||NFS-H cell. b Charge–discharge curves of Na||NFS-H and Na||FeS cells at fourth cycle, respectively. c Fourth charge–discharge voltage profiles of the FeS||NFS-H cell cycled at 24 mA g−1. d FeS||NFS-H cell cycling performance. e, f The overall performance evaluation with typical storage energy technologies and battery systems in SiBs. The color gradient from blue to red represents improved elemental abundances on earth and the nontoxic property of elements. The comprehensive evaluation of various sodium-ion battery systems and calculation parameters of electrode costs are presented in Supplementary Tables 8 and 9, respectively. The terms NFPF, HC, NVPF, NMO, PB, and NTO represent the electrode materials of Na2FePO4F, hard carbon, Na3(VOPO4)2F, Na0.76Cu0.22Fe0.30Mn0.48O2, Na1.64Ni[Fe(CN)6]0.92·1.83H2O, and NaTi2(PO4)3, respectively.

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