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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Rechargeable Na/Ni batteries based on the Ni(OH)(2)/NiOOH redox couple with high energy density and good cycling performance
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Rechargeable Na/Ni batteries based on the Ni(OH)(2)/NiOOH redox couple with high energy density and good cycling performance

机译：基于Ni（OH）（2）/ NIOOH氧化还原的可充电NA / NI电池，具有高能量密度和良好的循环性能

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Rechargeable battery systems that use Na-based anodes as alternatives to Li-ion batteries are highly desirable for grid-scale energy storage systems owing to the high abundance and low cost of Na. Furthermore, aqueous Na batteries are advantageous considering the cost, safety and cycle life. However, the limited energy density is still a critical issue for Na-based batteries. Here, we demonstrate a high performance rechargeable battery using dual electrolytes based on a Na metal anode and a redox couple of hierarchical NiCoAl-layered double hydroxide (NiCoAl-LDH) nanosheets on a carbon microfiber electrode with high energy storage capacity. In this design, the wide potential range of the Na metal anode and the high capacity of hierarchical NiCoAl-LDH nanosheets on a carbon microfiber cathode enable a rechargeable Na/Ni battery with excellent energy storage performance. For stable operation in a hybrid system using non-aqueous and aqueous electrolytes, an alkali-ion solid electrolyte (NASICON, Na3Zr2Si2PO12) is used for the separation of electrolytes. The Na/Ni battery exhibits a stable operating voltage of approximate to 3.1 V during discharge which outperforms the low cell voltage (approximate to 1.23 V) of an aqueous rechargeable battery, a high capacity of approximate to 350 mA h g(-1), and a resulting high energy density of approximate to 1085 W h kg(-1). With the combination of a solid-state redox couple as the cathode and a metallic sodium anode, our study demonstrates the high potential of Na based batteries for high energy EES systems.
机译：使用Na基阳极作为锂离子电池的替代品的可充电电池系统非常适用于由于NA的高丰度和低成本而产生的网格级能量存储系统。此外，考虑到成本，安全性和循环寿命，Na电池是有利的。然而，有限的能量密度仍然是基于NA的电池的关键问题。在这里，我们通过基于Na金属阳极和具有高能量存储容量的碳微纤维电极上的碳微纤维电极上的双电解质和氧化还原耦合的双电解质来证明高性能可充电电池。在这种设计中，碳微纤维阴极上的Na金属阳极的宽电位范围和碳微纤维阴极上的分层NiCoAl-LDH纳米电池具有优异的能量存储性能的可充电NA / Ni电池。为了使用非水和水性电解质的杂合系统中的稳定操作，使用碱离子固体电解质（NASICON，NA3ZR2SI2PO12）用于分离电解质。 Na / Ni电池在放电期间近似为3.1V的稳定工作电压，这优于含水可充电电池水溶液的低电池电压（近似为1.23V），高容量近似为350 ma hg（-1），以及产生高能量密度为1085WH kg（-1）。随着固态氧化还原耦合作为阴极和金属钠阳极的组合，我们的研究表明了高能量EES系统的基于Na基电池的高潜力。

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