Battery assembly optimization: Tailoring the electrode compression ratio based on the polarization analysis in vanadium flow batteries
Battery assembly optimization: Tailoring the electrode compression ratio based on the polarization analysis in vanadium flow batteries
复制标题
电池组装优化：基于钒液流电池极化分析定制电极压缩比
DOI：
10.1016/j.apenergy.2018.10.136
复制
发表时间：
2019
期刊：
影响因子：
11.2
通讯作者：
Zhang Huamin
中科院分区：
文献类型：
--
作者：
Yue Meng;Lv Zhiqiang;Zheng Qiong;Li Xianfeng;Zhang Huamin
钒液流电池正在成为大规模储能应用最有前景的候选电池之一。商业化道路上的主要制约因素是该系统的高成本。降低钒液流电池系统成本的有效途径之一是通过减小电池极化来提高功率密度，而这可以通过合理控制电极压缩比来实现。首次提出了考虑欧姆损耗、活化损耗和传质损耗的全极化模型。然后，将极化模型与先前开发的三维模型相耦合，以从机理上理解电极压缩比与电池极化之间的关系。采用数值模拟与实验相结合的方法，系统深入地研究了压缩比对极化及电池性能的影响，并通过实验验证了获得最佳压缩比的电池组件的性能优势。
Vanadium flow battery is emerging as one of the most promising candidates for large scale energy storage application. The major restriction on the route to commercialization is the high cost of the system. One of the effective ways to lower the cost of a vanadium flow battery system is improving the power density by reducing the battery polarization, which can be realized by controlling the electrode compression ratio reasonably. An overall polarization model, in consideration of the ohmic loss, activation loss and mass transport loss, was proposed for the first time. Then, the polarization model was coupled with a previously developed three-dimensional model to obtain a mechanistic understanding of the relationship between the electrode compression ratio and battery polarization. By combining numerical simulation with experiments, the effect of the compression ratio on the polarization and subsequently the battery performance was explored systemically and deeply, and the performance superiority of the battery assembly with the obtained optimal compression ratio was verified by experiments.