Lara Lubian, Ruben Rubio-Presa, Roberto Sanz, Virginia Ruiz, Edgar Ventosa
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引用次数: 0
Abstract
The search for organic electroactive molecules suitable in aqueous organic flow batteries requires great efforts not only from an electrochemical perspective (weeks of testing) but also from an organic synthesis viewpoint. In this work, the relevance of static cells for accelerating the search and helping understand degradation mechanisms is focused on. First an easy-to-make and reliable static cell is validated. A simple but effective approach is proposed to investigate active species in the absence of air, which is based on the use of a cheap lunch box (Ar-box) in contrast to the expensive Ar-filled glove box. The relevance of the proposed strategy is demonstrated by investigating two case studies. The 2,6-dihydroxantraquinone/K4Fe(CN)6 in alkaline is studied with and without Ar-box. The air leakage in the static cell in the Ar-box is neglectable, so an Ar-filled glove box is not needed. Interestingly, the use of Ar-box leads to higher capacity fading (1.3% vs 2.5% day−1) since a very small leakage of air prevents the formation of dimers. In neutral pH, the total absence of air using 1,1-bis[3-sulfonatopropyl]-4,4-bipyridinium/K4Fe(CN)6 static cell in the Ar-box leads to an increase in capacity fading (0.2% day−1) compared to reported values using Ar-filled glove box.
寻找适合于水性有机液流电池的有机电活性分子不仅需要从电化学的角度(数周的测试)而且需要从有机合成的角度付出巨大的努力。在这项工作中,静态细胞对加速搜索和帮助理解降解机制的相关性是重点。首先,验证了一个易于制作且可靠的静态单元。提出了一种简单而有效的方法来研究在没有空气的情况下的活性物种,该方法基于使用便宜的午餐盒(ar盒)而不是昂贵的ar填充手套箱。通过调查两个案例研究来证明拟议战略的相关性。研究了2,6-二羟基蒽醌/K4Fe(CN)6在碱性条件下的反应。氩气箱内静室的漏风可以忽略不计,因此不需要填充氩气手套箱。有趣的是,Ar-box的使用导致更高的容量衰落(1.3% vs 2.5% day - 1),因为非常小的空气泄漏阻止了二聚体的形成。在中性pH下,使用ar箱中的1,1-双[3-磺基托丙基]-4,4-联吡啶/K4Fe(CN)6静态电池,与使用ar填充手套箱的报告值相比,完全没有空气导致容量衰减增加(0.2% day - 1)。
期刊介绍:
Advanced Energy and Sustainability Research is an open access academic journal that focuses on publishing high-quality peer-reviewed research articles in the areas of energy harvesting, conversion, storage, distribution, applications, ecology, climate change, water and environmental sciences, and related societal impacts. The journal provides readers with free access to influential scientific research that has undergone rigorous peer review, a common feature of all journals in the Advanced series. In addition to original research articles, the journal publishes opinion, editorial and review articles designed to meet the needs of a broad readership interested in energy and sustainability science and related fields.
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