Battery assembly optimization: Tailoring the electrode compression ratio based on the polarization analysis in vanadium flow batteries

被引:38
作者
Yue, Meng [1 ,2 ]
Lv, Zhiqiang [1 ,2 ]
Zheng, Qiong [1 ]
Li, Xianfeng [1 ,3 ]
Zhang, Huamin [1 ,3 ]
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[3] Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China
基金
中国国家自然科学基金;
关键词
Vanadium flow battery; Polarization model; Polarization analysis; Porous electrode; Compression ratio; CARBON FELT ELECTRODES; TECHNOECONOMIC ASSESSMENT; POROUS MEMBRANES; PERFORMANCE; MODEL; DESIGN; NANOFIBERS; TRANSPORT;
D O I
10.1016/j.apenergy.2018.10.136
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
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.
引用
收藏
页码:495 / 508
页数:14
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