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不同磺化度的Nafion 212和磺化聚（醚醚酮）膜对铁铬液流电池性能的比较研究

A Comparative Study of Nafion 212 and Sulfonated Poly(Ether Ether Ketone) Membranes with Different Degrees of Sulfonation on the Performance of Iron-Chromium Redox Flow Battery.

作者信息

Bai Enrui, Zhu Haotian, Sun Chuanyu, Liu Guanchen, Xie Xiaoyin, Xu Chongyang, Wu Sheng

机构信息

Yantai Research Institute, Harbin Engineering University, Yantai 264003, China.

School of Chemistry and Chemical Technology, Hubei Polytechnic University, Huangshi 435003, China.

出版信息

Membranes (Basel). 2023 Sep 30;13(10):820. doi: 10.3390/membranes13100820.

DOI:10.3390/membranes13100820
PMID:37887992
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10608269/
Abstract

For an iron-chromium redox flow battery (ICRFB), sulfonated poly(ether ether ketone) (SPEEK) membranes with five various degrees of sulfonation (DSs) are studied. To select the SPEEK membrane with the ideal DS for ICRFB applications, the physicochemical characteristics and single-cell performance are taken into consideration. Following all the investigations, it has been determined that the SPEEK membrane, which has a DS of 57% and a thin thickness of 25 μm, is the best option for replacing commercial Nafion 212 in ICRFB. Firstly, it exhibits a better cell performance according to energy efficiency (EE) and coulombic efficiency (CE) at the current density range between 40 mA cm and 80 mA cm. Additionally, it has a more stable EE (79.25-81.64%) and lower discharge capacity decay rate (50%) than the Nafion 212 (EE: 76.74-81.45%, discharge capacity decay: 76%) after 50 charge-discharge cycles, which proves its better oxidation stability as well. In addition, the longer self-discharge time during the open-circuit voltage test further demonstrates that this SPEEK membrane could be employed for large-scale ICRFB applications.

摘要

对于铁铬氧化还原液流电池（ICRFB），研究了具有五种不同磺化度（DS）的磺化聚醚醚酮（SPEEK）膜。为了选择适用于ICRFB应用的具有理想磺化度的SPEEK膜，考虑了其物理化学特性和单电池性能。经过所有研究，已确定磺化度为57%且厚度为25μm的薄SPEEK膜是在ICRFB中替代商业Nafion 212的最佳选择。首先，在40 mA/cm至80 mA/cm的电流密度范围内，根据能量效率（EE）和库仑效率（CE），它表现出更好的电池性能。此外，在50次充放电循环后，它具有比Nafion 212更稳定的能量效率（79.25 - 81.64%）和更低的放电容量衰减率（50%）（Nafion 212的能量效率：76.74 - 81.45%，放电容量衰减：76%），这也证明了其更好的氧化稳定性。此外，开路电压测试期间更长的自放电时间进一步表明这种SPEEK膜可用于大规模ICRFB应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/421973bb25f0/membranes-13-00820-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/ae07e3e444dd/membranes-13-00820-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/b5127890d1f3/membranes-13-00820-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/a911a53dbde5/membranes-13-00820-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/77b3eec01a83/membranes-13-00820-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/1699380cc11e/membranes-13-00820-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/379166287b7a/membranes-13-00820-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/421973bb25f0/membranes-13-00820-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/645714ec88f6/membranes-13-00820-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/00a6612771fe/membranes-13-00820-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/54946772a126/membranes-13-00820-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/495cbc5ec6cb/membranes-13-00820-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/d395e31d13b2/membranes-13-00820-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/e228f0f09110/membranes-13-00820-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/f0166a43fd39/membranes-13-00820-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/ae07e3e444dd/membranes-13-00820-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/b5127890d1f3/membranes-13-00820-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/a911a53dbde5/membranes-13-00820-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/77b3eec01a83/membranes-13-00820-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/1699380cc11e/membranes-13-00820-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/379166287b7a/membranes-13-00820-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5b59/10608269/421973bb25f0/membranes-13-00820-g014.jpg

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