4.8 Article

Evaluation of properties and performance of nanoscopic materials in vanadium diboride/air batteries

期刊

JOURNAL OF POWER SOURCES
卷 239, 期 -, 页码 244-252

出版社

ELSEVIER
DOI: 10.1016/j.jpowsour.2013.03.071

关键词

Vanadium diboride/air batteries; Nanomaterials; Electrochemical properties; High energy density power sources

资金

  1. National Science Foundation [1006568]
  2. Air Force Research Laboratory [FA8650-11-M-5170]
  3. Division Of Materials Research
  4. Direct For Mathematical & Physical Scien [1006568] Funding Source: National Science Foundation

向作者/读者索取更多资源

The unique eleven electron per molecule electrochemical oxidation of vanadium diboride (VB2) combined with an air cathode provides VB2/air batteries that have extremely high theoretical energy densities. Testing of VB2/air cells at various discharge times showed that VB2/air batteries containing nanoscopic VB2 anodes provide higher capacities and voltages than cells containing macroscopic VB2 anodes. The structure and properties of nanoscopic VB2 were compared with those of macroscopic VB2 to provide further insight into the enhanced electrochemical performance of the nanomaterial. From nitrogen physisorption and electrical conductivity measurements, we determined that the higher performance of the nanoscopic VB2 material compared with the macroscopic VB2 material may result from the combination of the nanomaterial's higher surface area and higher electronic conductivity. The thickness of the zirconia layer applied to prevent corrosion in alkaline electrolyte was shown by transmission electron microscopy and energy dispersive X-ray spectroscopy to be ca. 3-40 nm which may allow rapid discharge through the coating. Electrochemical impedance spectroscopy results showed that for cells containing both the macroscopic and the nanoscopic materials the resistance associated with charge transfer increases during the discharge process. The results provide a basis for further development of high energy and power density VB2/air batteries. (C) 2013 Published by Elsevier B.V.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据