School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919, South Korea.
Chemical Science and Engineering Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
ACS Appl Mater Interfaces. 2017 Mar 29;9(12):10618-10625. doi: 10.1021/acsami.6b15355. Epub 2017 Mar 16.
Sodium-ion batteries are now close to replacing lithium-ion batteries because they provide superior alternative energy storage solutions that are in great demand, particularly for large-scale applications. To that end, the present study is focused on the properties of a new type of dual-electrode material, NaNiMnO, synthesized using a mixed hydroxy-carbonate route. Cyclic voltammetry confirms that redox couples, at high and low voltage ranges, are facilitated by the unique features and properties of this dual-electrode, through sodium ion deintercalation/intercalation into the layered NaNiMnO material. This material provides superior performance for Na-ion batteries, as evidenced by the fabricated sodium cell that yielded initial charge-discharge capacities of 125/218 mAh g in the voltage range of 1.5-4.4 V at 0.5 C. At a low voltage range (1.5-2.6 V), the anode cell delivered discharge-charge capacities of 100/99 mAh g with 99% capacity retention, which corresponds to highly reversible redox reaction of the Mn reduction and the Mn oxidation observed at 1.85 and 2.06 V, respectively. The symmetric Na-ion cell, fabricated using NaNiMnO, yielded initial charge-discharge capacities of 196/187 μAh at 107 μA. These results encourage the further development of new types of futuristic sodium-ion-battery-based energy storage systems.
钠离子电池现在已经接近取代锂离子电池，因为它们提供了卓越的替代储能解决方案，需求量很大，尤其是对于大规模应用而言。为此，本研究专注于一种新型双电极材料 NaNiMnO 的性能，该材料是通过混合羟基碳酸盐路线合成的。循环伏安法证实，通过钠离子脱嵌/嵌入层状 NaNiMnO 材料，独特的特性和性能促进了在高低电压范围内的氧化还原对。这种材料为钠离子电池提供了卓越的性能，由制备的钠离子电池在 1.5-4.4 V 的电压范围内以 0.5 C 的速率进行初始充放电时，其容量分别为 125/218 mAh g。在低电压范围（1.5-2.6 V）下，阳极电池的放电-充电容量为 100/99 mAh g，容量保持率为 99%，这对应于在 1.85 和 2.06 V 分别观察到的 Mn 还原和 Mn 氧化的高度可逆氧化还原反应。使用 NaNiMnO 制备的对称钠离子电池在 107 μA 时的初始充放电容量为 196/187 μAh。这些结果鼓励进一步开发新型基于钠离子电池的储能系统。
