Flow field design and optimization of high power density vanadium flow batteries: A novel trapezoid flow battery
Flow field design and optimization of high power density vanadium flow batteries: A novel trapezoid flow battery
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DOI：
10.1002/aic.15959
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发表时间：
2018-02
期刊：
影响因子：
3.7
通讯作者：
Meng Yue;Qiong Zheng;Feng Xing;Huamin Zhang;Xianfeng Li;Xiangkun Ma
中科院分区：
文献类型：
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作者：
Meng Yue;Qiong Zheng;Feng Xing;Huamin Zhang;Xianfeng Li;Xiangkun Ma
钒液流电池（VFB）是高效大规模储能应用的首选技术之一。其商业化的关键问题是降低成本，这可以通过开发高功率密度VFB堆来实现。发展高功率密度电堆的有效策略之一是通过流场设计来增强传质。针对传统矩形液流电池（RFB）浓差极化分布不均匀的特点，首次提出了一种新型梯形液流电池（TFB）。在此基础上，提出了一种实用的、通用的TFB结构优化策略，即分步优化法和算术级数模型。通过数值模拟和放大电堆充放电试验相结合，验证了优化后的TFB的传质增强和性能改善，电压效率和电解质利用率显著提高，使其具有比RFB更大的优越性。本文受版权保护。All rights reserved.
Vanadium flow battery (VFB) is one of the preferred techniques for efficient large-scale energy storage applications. The key issue for its commercialization is cost reduction, which can be achieved by developing high power density VFB stacks. One of the effective strategies for developing high power density stacks is to enhance the mass transport by performing flow field design. Based on the maldistribution characteristics of concentration polarization inside a conventional rectangular flow battery (RFB), a novel trapezoid flow battery (TFB) was firstly proposed. Furthermore, a practical and general strategy, consisting of a stepping optimization method and an arithmetic progression model, has been developed for the TFB's structure optimization. By combining numerical simulation with charge-discharge test of the magnified stacks, it was verified that mass transport enhancement and performance improvement of the optimized TFB, with significant increments in voltage efficiency and electrolyte utilization, allowed it to possess great superiority over the RFB. This article is protected by copyright. All rights reserved.