Potassium secondary cell based on Prussian blue cathode
Potassium secondary cell based on Prussian blue cathode
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DOI：
10.1016/j.jpowsour.2003.08.007
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发表时间：
2004-02-16
影响因子：
9.2
通讯作者：
Eftekhari, A
中科院分区：
文献类型：
--
作者：
Eftekhari, A
设计了以钾为阳极，以普鲁士蓝为阴极的钾二次电池。非水电池电解质溶液为1 M KBF4， EC/EMC比例为3:7。与同类锂电池相比，所设计的钾电池具有一些可贵的优点。电池设计简单，所用的材料和制造电池所需的程序都更便宜。此外，该电池具有良好的可循环性，可进行500多次可逆循环。在高温下，电池性能的容量衰减可以忽略不计。此外，电池中K+的化学扩散系数高于锂电池中Li+的化学扩散系数，这是由于电解质溶液（溶剂化离子）中K+的斯托克半径更小。从实验测量中获得的结果和这种可充电电池的前景表明，它是锂二次电池的有前途的替代品。(C) 2003 Elsevier b.v.版权所有
A potassium secondary cell was designed employing a potassium anode and a Prussian blue (PB)-based cathode. The electrolyte solution for the nonaqueous battery was 1 M KBF4 in 3:7 EC/EMC. The potassium battery designed had some valuable advantages in comparison with similar lithium batteries. The cell design is simple, and both the material used and the procedure needed for the cell fabrication are cheaper. In addition, the cell has an excellent cyclability for more than 500 reversible cycles. There is only a negligible capacity fade for the battery performance at elevated temperatures. Moreover, the chemical diffusion coefficient of K+ in the cell is higher than that of Li+ in lithium batteries, which is due to a smaller Stoke's radius of K+ in electrolyte solution (solvated ions). The results obtained from the experimental measurements and the prospective of this rechargeable cell suggest it as a promising alternative to lithium secondary cells. (C) 2003 Elsevier B.V All rights reserved.