To Carbon or Not to Carbon: Rethinking Electrode Design in Unitized Reversible Fuel Cells
カーボンか否か：ユニット化可逆燃料電池における電極設計の再考 (AI 翻訳)
Mahmoud M. Gomaa, P. S. A. Nopuo, M.A. Rodrigo, J. Lobato
🤖 gxceed AI 要約
日本語
本論文は、ユニット化可逆燃料電池（URFC）における電極設計、特にカーボンベース微多孔層（MPL）の影響を検討。チタンフェルト電極に異なるカーボン量（1～3 mgC/cm2）のMPLを適用し、RuO2-Pt触媒をコーティング。2 mgC/cm2のMPLで最適な性能を示し、電解モードでは工業基準を超える水素生成効率（60℃で15 mgH2/Wh）とCO2捕捉能を達成。燃料電池モードでは従来比10倍の出力密度（約30 mW/cm2）を実現。
English
This study investigates the role of carbon-based microporous layers (MPLs) in unitized reversible fuel cells (URFCs) integrating the chlor-alkali process. Titanium felt electrodes with varying carbon loadings (1-3 mgC/cm2) were coated with RuO2-Pt catalyst. The optimal MPL with 2 mgC/cm2 reduced resistance and enhanced hydrophobicity, achieving hydrogen production efficiency of 15 mgH2/Wh at 60°C (surpassing industrial benchmarks) with >98% Faradaic efficiency and simultaneous CO2 capture. In fuel cell mode, peak power density reached ~30 mW/cm2, an order of magnitude higher than previous reports.
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
日本は水素社会の実現を目指しており、本技術は再エネ余剰電力の貯蔵・利用に寄与する可能性がある。ただし、現状は実験室段階であり、日本企業による実用化研究への発展が期待される。
In the global GX context
This paper advances the global energy transition by proposing a multifunctional URFC that simultaneously generates hydrogen and captures CO2. The improved electrode design offers a pathway to scalable, efficient energy storage, relevant for integrating intermittent renewables.
👥 読者別の含意
🔬研究者:Provides novel electrode design insights for reversible fuel cells, especially the role of carbon MPLs in enhancing performance and enabling dual functionality.
🏢実務担当者:Offers material optimization strategies for developing cost-effective, high-efficiency URFCs for energy storage and CO2 capture applications.
📄 Abstract（原文）
The development of efficient and scalable energy storage systems remains a major challenge in the transition to renewable energy. Unitized reversible fuel cells (URFCs), capable of operating in both electrolysis and fuel cell modes, offer a promising solution. In this context, integrating the chlor-alkali process into URFCs enables not only cost-effective energy storage but also environmental benefits such as CO2 capture via alkaline absorption. While chlor-alkali electrolysis is well established, the reversible operation is not well known. This study addresses a key design question: the role of carbon-based materials in electrode architecture, specifically in the use of a carbon-based microporous layer. Titanium felt electrodes were modified with microporous layers (MPLs) containing 1, 2, and 3 mgC/cm2 and coated with a RuO2–Pt catalyst using a Pechini-type polymeric precursor method. The results showed that increasing the carbon content, the electrode resistance was reduced and surface hydrophobicity was enhanced, achieving the best results with 2 mgC/cm2 in the MPL. Moreover, in electrolysis mode, the hydrogen production efficiency improved with temperature, reaching 15 mgH2/Wh at 60 °C (surpassing industrial benchmarks). The system also achieved high Faradaic efficiency for hydrogen production (>98%) and enabled simultaneous CO2 capture via cathodic alkaline absorption. In fuel cell mode, the optimized electrode reached a peak power density of ∼30 mW/cm2 at 60 °C, an order of magnitude higher than previously reported in the literature for similar systems. The results are very promising and position chlor-alkali-based reversible electrochemical cells as a promising platform for efficient, scalable, and multifunctional energy storage and conversion technologies.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1021/acsami.5c15144first seen 2026-05-05 23:52:07
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