2017
DOI: 10.1186/s11671-017-2340-1
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Na4Mn9O18/Carbon Nanotube Composite as a High Electrochemical Performance Material for Aqueous Sodium-Ion Batteries

Abstract: The aqueous sodium-ion battery (ASIB) is one of the promising new energy storage systems owing to the abundant resources of sodium as well as efficiency and safety of electrolyte. Herein, we report an ASIB system with Na4Mn9O18/carbon nanotube (NMO/CNT) as cathode, metal Zn as anode and a novel Na+/Zn2+ mixed ion as electrolyte. The NMO/CNT with microspherical structure is prepared by a simple spray-drying method. The prepared battery delivers a high reversible specific capacity and stable cyclability. Further… Show more

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Cited by 21 publications
(10 citation statements)
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“…The XRD patterns of Na 4 Mn 9 O 18 synthesized by HSCR method are displayed in Figure 2. The diffraction peaks are in good agreement with the JCPDS (The Joint Committee on Powder Diffraction Standards) Card number 27-0750 [20]. No impurity peaks were observed.…”
Section: Resultssupporting
confidence: 78%
“…The XRD patterns of Na 4 Mn 9 O 18 synthesized by HSCR method are displayed in Figure 2. The diffraction peaks are in good agreement with the JCPDS (The Joint Committee on Powder Diffraction Standards) Card number 27-0750 [20]. No impurity peaks were observed.…”
Section: Resultssupporting
confidence: 78%
“…The R s is the electrolyte resistance, R ct is the charge‐transfer resistance at two electrode–electrolyte interfaces, Z w is the interfacial diffusion resistance (Warburg impedance) that related to the ion diffusion in the electrode materials, and the CPE is the double layer capacitance. [ 53 ] Upon heating from 30 to 50 °C, the R ct of both modified separator and NKK separator based batteries become smaller with the impedances decrease from 119.4 to 69.47 Ω and from 111.7 to 92.6 Ω, respectively (Figure 6A,B). This is because the ion migration rate becomes faster at higher temperatures.…”
Section: Resultsmentioning
confidence: 99%
“…Recently, Na 0.44 MnO 2 has been widely reported as a cathode material for a rechargeable aqueous sodium-ion battery (SIB) because of its stable tunnel structure, abundant resources, and environmental benignity. , Many works have demonstrated that Na 0.44 MnO 2 could exhibit a long cycle life in neutral aqueous solution; ,, thus, Na 0.44 MnO 2 is regarded as an ideal cathode material to match with the Zn anode in an aqueous SIB. However, a very low discharge capacity of 30–40 mA h g –1 was obtained for Na 0.44 MnO 2 in previous works because the electrochemical operation potential was limited to a narrow window to avoid an irreversible phase transition. ,, Although the discharge capacity of Na 0.44 MnO 2 was raised to 113 mA h g –1 by using hybrid electrolytes with Zn 2+ and Mn 2+ , it dramatically decreased to 40 mA h g –1 after 10 cycles .…”
Section: Introductionmentioning
confidence: 99%