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Sulfonated Graphitic Carbon Nitride/UiO‐66‐NH <sub>2</sub> Infused PVDF‐ <i>co</i> ‐HFP‐Tailored Zwitterionic Membranes for Low‐Humidity Hydrogen Fuel Cells and Vanadium Flow Batteries

スルホン化グラファイト状窒化炭素/UiO-66-NH2を添加したPVDF-co-HFP系双性イオン膜による低湿度水素燃料電池およびバナジウムフロー電池の高性能化 (AI 翻訳)

Pratyush Patnaik, Sk Miraz Hossain, Ritika Sharma, Rakhi Mondal, Uma Chatterjee

Small📚 査読済 / ジャーナル2026-04-21#水素Origin: Global
DOI: 10.1002/smll.73441
原典: https://doi.org/10.1002/smll.73441

🤖 gxceed AI 要約

日本語

本研究では、水素燃料電池とバナジウムフロー電池の両方に適用可能な多機能膜を開発した。PVDF-co-HFPをベースに双性イオン性を付与し、UiO-66-NH2とスルホン化グラファイト状窒化炭素を複合化することで、イオン伝導度と燃料透過性のトレードオフを解決した。最適化されたPDS-11膜は、80℃で27.1 mS cm-1のプロトン伝導度を示し、燃料電池では70%RHで89%の出力維持率、バナジウムフロー電池では200サイクルにわたって高いクーロン効率を示した。

English

This study develops a multifunctional membrane for both hydrogen fuel cells and vanadium flow batteries. By grafting zwitterionic groups onto PVDF-co-HFP and incorporating UiO-66-NH2 and sulfonated graphitic carbon nitride, the membrane achieves high proton conductivity (27.1 mS cm⁻¹ at 80°C) and low vanadium ion permeability. The optimized membrane shows 89% power retention at 70% RH in fuel cells and over 74% energy efficiency over 200 cycles in flow batteries.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

本研究成果は、日本の水素社会実装戦略や再生可能エネルギー貯蔵技術の高度化に寄与する可能性がある。特に、低湿度条件下での燃料電池性能改善は、日本の実運用環境に適した材料開発の一助となる。

In the global GX context

This paper advances membrane technology for hydrogen fuel cells and vanadium flow batteries, both critical for global decarbonization. The improved performance under low-humidity conditions addresses a key challenge for fuel cell deployment, supporting the global energy transition towards hydrogen and renewable energy storage.

👥 読者別の含意

🔬研究者:Materials scientists working on proton exchange membranes can leverage the synergistic filler approach to enhance conductivity and selectivity.

🏢実務担当者:Fuel cell and battery manufacturers may find the membrane's low-humidity performance and durability useful for product development.

📄 Abstract（原文）

ABSTRACT A “ two‐birds‐one‐stone ” strategy was employed to design a multifunctional membrane capable for both energy production and storage devices. Poly(vinylidene fluoride‐ co ‐hexafluoropropylene)‐ g ‐poly‐2‐(dimethylamino)ethyl methacrylate‐based zwitterionic composite membranes were synthesized via ATRP‐mediated grafting, followed by N‐alkylation with 1,3‐propanesultone. The membrane architecture was further tailored by incorporating UiO‐66‐NH 2 and sulfonated graphitic carbon nitride (sgC 3 N 4 ) as complexed fillers, forming a hierarchically organized ionic framework that reconciles the trade‐off between ionic conductivity and fuel/electrolyte permeability. The optimized PDS‐11 membrane (UiO‐66‐NH 2 : sgC 3 N 4 = 1:1, 1% w/w) exhibited high ion exchange capacity and proton conductivity (K m = 27.1 mS cm −1 at 80°C), 2.65 times higher than pristine PDS. Its low VO 2+ permeability and high ion selectivity arise from synergistic acid‐base and H‐bonding interactions between ‐NH/‐NH 2 and ‐SO 3 H groups, complemented by non‐covalent interactions and physical blocking within the membrane matrix. The porous UiO‐66‐NH 2 and layered sgC 3 N 4 improved water retention and structural robustness, yielding 89% power retention at 70% RH in PEMFCs, with a mere OCV decay rate of 1.6 mV h −1 over 50 h. PDS‐11 also exhibited exceptional VRFB performance with CE, VE, and EE of 97.41%, 76.32%, and 74.34%, respectively,, over 200 cycles at 120 mA cm −2 (42.3% of capacity retention after 100 cycles with 620 min of OCV retention).

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