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J. Phys. Energy 3 (2021) 031503 N Tapia-Ruiz et al 20 Table 1. Selected organic positive electrode materials tested in non-aqueous electrolytes, either in Na half-cell or full-cell configurations. Note that specific capacity values are reported per mass of positive active material, except for entry #4, which is expressed per mass of negative active material. PTCDI: 3,4,9,10-perylenetetracarboxylic diimide; TPA: terephthalic acid; DHTPA: 2,5-dihydroxyterephthalic acid; PTMA: poly(2,2,6,6-tetramethylpiperidine-4-yl-1-oxyl methacrylate); PTVE: poly(2,2,6,6-tetramethylpiperidine-4-yl-1-oxyl vinyl ether); PTPAn: polytriphenylamine; PAQS: poly(anthraquinonyl sulphide); EC/DMC: ethylene carbonate/dimethyl carbonate; DME: 1,2-dimethoxyethane; PC: propylene carbonate; DEGDME: Diethylene glycol dimethyl ether; DEC: diethyl carbonate; DOL: 1,3-dioxolane. Half-reaction at the positive # electrode Half-reaction at the negative electrode Electrolyte Output voltage (V) Specific capacity (mAh g−1), capacity retention, cycles, ref. 1 2 3 4 5 6 7 1 M NaPF6 in EC/DMC (w/w 1:1) 2.2 111, 88%, 5000 [57] /100, 100%, 1000 [58] 1 M NaPF6 in PC ≈1.6 73, 70%, 20 [59] 0.6 M NaPF6 in DEGDME ≈1.25 137, 85%, 30 [60] 1 M NaClO4 in EC/DMC (v/v 1:1) ≈2.0 204, 76%, 100 [61] 1 M NaClO4 in EC/DEC (v/v 1:1) ≈3.0 222, 92%, 100 [63] 1.5 M NaClO4 in EC/DEC (v/v 1:1) ≈3.45 127, 94%, 100 [64] Saturated NaPF6 in DOL/DME (v/v 1:1) ≈1.8 180, 85%, 500 [65]PDF Image | 2021 roadmap for sodium-ion batteries
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