Long-term performance of hydrogen-bromine flow batteries using single-layered and multi-layered wire-electrospun SPEEK/PFSA/PVDF membranes,Sustainable Energy & Fuels

当前位置： X-MOL 学术 › Sustain. Energy Fuels › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Long-term performance of hydrogen-bromine flow batteries using single-layered and multi-layered wire-electrospun SPEEK/PFSA/PVDF membranes
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2024-02-27 , DOI: 10.1039/d3se01670f
Sanaz Abbasi _{1,

2} , Yohanes Antonius Hugo ₂ , Zandrie Borneman _{1,

3} , Wiebrand Kout ₂ , Kitty Nijmeijer _{1,

3}

Affiliation

Sulfonated poly (ether ketone) (SPEEK), perfluorosulfonic acid (PFSA), and polyvinylidene fluoride (PVDF) were wire-electrospun. Subsequently, multiple electrospun layers in different arrangements were hot-pressed into sustainable membranes for use in hydrogen-bromine flow batteries (HBFBs). The relationship between the electrospun layer composition and arrangement, membrane properties, and battery performance was explored. Wire-electrospinning and hot-pressing improved SPEEK and PFSA/PVDF compatibility, yielding dense membranes. Higher SPEEK contents lead to rougher morphologies, while the insulating nature of PVDF decreases the ion exchange capacity (IEC) and HBr uptake compared to commercial PFSA. The multi-layer assembly negatively impacted the membrane transport properties compared to the single-layer arrangement. Although wire-electrospinning improves the polymer dispersion and fixed charge density, SPEEK-rich regions of the blend membranes lack the high selectivity of PFSA, thus reducing the ionic conductivity. This is especially clear in the multi-layer membranes with accumulated SPEEK in the intermediate layer in the through-plane direction. Following initial property comparisons, thinner wire-electrospun SPEEK membranes were prepared with area resistance in the PFSA-comparable range. Among the wire-electrospun SPEEK/PFSA/PVDF membranes, the single-layered membrane with 8 wt% SPEEK (SPF1-8; 62 μm) displayed stable HBFB performance at 200 mA cm⁻² over 100 cycles (64 cm² active area). Based on the ex-situ measurements and cell performance results, a total of ∼10.5 wt% SPEEK is suggested as the limit for both single and multi-layered wire-electrospun membranes, combined with a maximum membrane thickness of ∼50 μm. This ensures robust HBFB performance, positioning wire-electrospun SPEEK/PFSA/PVDF membranes as a PFSA alternative in energy storage.

中文翻译：

使用单层和多层丝电纺SPEEK/PFSA/PVDF膜的氢溴液流电池的长期性能

磺化聚醚酮 (SPEEK)、全氟磺酸 (PFSA) 和聚偏二氟乙烯 (PVDF) 采用线电纺丝。随后，不同排列的多个静电纺丝层被热压成可持续的膜，用于氢溴液流电池（HBFB）。探讨了电纺层的组成和排列、膜性能和电池性能之间的关系。线静电纺丝和热压提高了 SPEEK 和 PFSA/PVDF 的兼容性，产生致密的膜。较高的 SPEEK 含量会导致更粗糙的形貌，而与商用 PFSA 相比，PVDF 的绝缘性质会降低离子交换容量 (IEC) 和 HBr 吸收量。与单层布置相比，多层组装对膜传输特性产生负面影响。尽管线静电纺丝改善了聚合物分散性和固定电荷密度，但共混膜中富含SPEEK的区域缺乏PFSA的高选择性，从而降低了离子电导率。这在中间层沿平面方向累积SPEEK的多层膜中尤其明显。经过初步性能比较后，制备了更薄的电纺丝 SPEEK 膜，其面积电阻在 PFSA 相当的范围内。在电纺丝SPEEK/PFSA/PVDF膜中，含有8wt%SPEEK的单层膜（SPF1-8；62μm）在200mA cm -2^下100个循环（64 cm ²活性面积）中表现出稳定的HBFB性能。根据异位测量和电池性能结果，建议单层和多层电纺丝膜的总含量为~10.5 wt% SPEEK，最大膜厚度为~50 μm。这确保了强大的 HBFB 性能，将线电纺 SPEEK/PFSA/PVDF 膜定位为储能领域的 PFSA 替代品。

更新日期：2024-02-27

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文