• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >Preparation and Electrochemical Properties of High Purity Mixed-Acid Electrolytes for High Energy Density Vanadium Redox Flow Battery
【24h】

Preparation and Electrochemical Properties of High Purity Mixed-Acid Electrolytes for High Energy Density Vanadium Redox Flow Battery

机译：高能密度钒氧化还原液流电池用高纯混合酸电解质的制备及电化学性能

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

All-vanadium redox flow battery (VRFB) is a large-scale electrochemical energy storage technology with numerous potential applications because of its inherent safety and long service life. In previous years, a novel mixed-acid electrolyte system, vanadium electrolytes with mixture of sulfuric acid and hydrochloric acid, has been developed by the Pacific Northwest National Laboratory (PNNL) to increase vanadium solubility, which can effectively raise the electrolyte energy density from 25 Wh/L to 40 Wh/L. To further improve mixed-acid VRFBs, in present work, high purity mixed-acid electrolytes were prepared using a novel direct dissolution – electrochemical reduction process from high purity vanadium oxytrichloride (VOCl3). And the purity and electrochemical properties were investigated, comparing with common mixed-acid electrolytes and regular sulfate electrolytes prepared from metallurgical grade vanadium pentoxide. It was found that the novel process demonstrated a great potential for the low cost and high efficiency production of high purity electrolytes with excellent electrochemical properties for mixed-acid VRFBs. Comparing the traditional high purity electrolytes preparation process, the present novel method will dramatically cut the cost by more than 90 percent, which will considerably facilitate the commercial application of high performance and high density VRFBs.
机译：全钒氧化还原液流电池（VRFB）是一种大规模的电化学储能技术，由于其固有的安全性和较长的使用寿命，因此具有许多潜在的应用前景。过去几年，太平洋西北国家实验室（PNNL）开发了一种新颖的混合酸电解液系统，即将硫酸与盐酸混合的钒电解液，以提高钒的溶解度，从而可以有效地将电解液的能量密度从25提高到25 Wh / L至40 Wh / L。为了进一步改善混合酸VRFB，在目前的工作中，使用新型的直接溶解–高纯三氯氧化钒（VOCl3）的电化学还原工艺制备了高纯度混合酸电解质。并与冶金级五氧化二钒制备的普通混合酸电解液和普通硫酸盐电解液进行了比较，研究了其纯度和电化学性能。发现该新方法显示出低成本和高效率生产具有优异的电化学性能的高纯度电解质的巨大潜力，所述高纯度电解质对于混合酸VRFB具有良好的电化学性能。与传统的高纯度电解质制备工艺相比，本发明的新方法将成本大大降低了90％以上，这将极大地促进高性能和高密度VRFB的商业应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号