High performance ZrO2 modified sulfonated poly (ether ether ketone) ion-exchange membrane for Iron-chromium redox flow battery application

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-06-14 DOI:10.1016/j.electacta.2025.146695

Qianqian Zeng , Xi Liu , Yang Liu , Qinghao Feng , Zhaohao Wang , Guanchen Liu , Xiaoyin Xie , Zhihai Liu

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Abstract

A high-performance ion-exchange membrane (IEM) for an iron-chromium redox flow battery (ICRFB) was fabricated by zirconium dioxide (ZrO₂) with sulfonated poly (ether ketone) (SPEEK, with a degree of sulfonation: 57 %). A series of physical and chemical tests such as water uptake (WU), swelling ratio (SR), ion exchange capacity (IEC), proton conductivity, strength characteristics and permeability were performed. Additionally, it was notable that the ZrO₂ -SPEEK (Zr/S) IEM with the optimal reference ratio (7.5 %) showed higher coulombic efficiency (CE:97.74 %) and energy efficiency (EE:82.85 %) at 100 mA·cm⁻² than Nafion-212 IEM (CE:96.7 %, EE:82.55 %) and SPEEK-57 IEM (CE:96.86 %, EE:76.84 %) in the ICRFB single-cell test. In the first cycle, the Zr/S-7.5 % IEM delivered a higher discharge capacity (708 mAh) than the Nafion-212 IEM (508 mAh) and SPEEK-57 IEM (373 mAh). Moreover, the composite membrane could maintain 1.2 V open-circuit voltage for 56.5 h in the self-discharge experiment, surpassing Nafion-212 IEM (4.617 h) and SPEEK-57 IEM (14.783 h).

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高性能ZrO2改性磺化聚醚醚酮离子交换膜在铁铬氧化还原液流电池中的应用

以二氧化锆（ZrO2）和磺化聚醚酮（SPEEK，磺化度为57%）为原料，制备了用于铁铬氧化还原液流电池（ICRFB）的高性能离子交换膜（IEM）。进行了吸水性（WU）、溶胀比（SR）、离子交换容量（IEC）、质子电导率、强度特性和渗透率等一系列理化测试。此外，在ICRFB单细胞试验中，最佳参比为7.5%的ZrO2 -SPEEK (Zr/S) IEM在100 mA·cm−2下的库伦效率（CE: 97.74%）和能量效率（EE: 82.85%）均高于Nafion-212 IEM （CE: 96.7%, EE: 82.55%）和SPEEK-57 IEM （CE: 96.86%, EE: 76.84%）。在第一个循环中，Zr/ s - 7.5% IEM的放电容量（708 mAh）高于nation -212 IEM （508 mAh）和SPEEK-57 IEM （373 mAh）。在自放电实验中，复合膜能维持1.2 V开路电压56.5 h，超过了nation -212 IEM （4.617 h）和SPEEK-57 IEM （14.783 h）。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.