Molecular Design of Fused-Ring Phenazine Derivatives for Long-Cycling Alkaline Redox Flow Batteries,ACS Energy Letters

当前位置： X-MOL 学术 › ACS Energy Lett. › 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.)

Molecular Design of Fused-Ring Phenazine Derivatives for Long-Cycling Alkaline Redox Flow Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-01-13 , DOI: 10.1021/acsenergylett.9b02676
Caixing Wang ₁ , Xiang Li ₁ , Bo Yu ₁ , Yanrong Wang ₁ , Zhen Yang ₂ , Huaizhu Wang ₁ , Huinan Lin ₁ , Jing Ma ₁ , Guigen Li ₁ , Zhong Jin _{1,

3}

Affiliation

The utilization of redox-active organic species in aqueous redox flow batteries holds great promise for large-scale and sustainable energy storage. Herein, we report the low-temperature green synthesis of three different phenazine derivatives and investigate their performances in alkaline organic redox flow batteries. Electrochemical characterizations reveal that the ortho-substituents of the hydroxyl groups in phenazine derivatives have significant influences on the battery performances. By introducing an additional phenyl group adjacent to the hydroxyl group in the phenazine motif and a carboxyl group with strong solubilizing effect, the redox flow battery based on fused-ring benzo[a]hydroxyphenazine-7/8-carboxylic acid with 1.0 M electron concentration exhibits greatly improved capacity retention rate of 99.986% cycle^–1 (99.92% day^–1) and stable average energy efficiency of ∼80% for over 1300 cycles. Moreover, a combinatorial library of hydroxyphenazine derivatives with varying substituent groups was built, and their redox properties were simulated to guide further molecular structure design of phenazine-derived electroactive compounds.

中文翻译：

长环碱性氧化还原液流电池熔融环吩嗪衍生物的分子设计

水性氧化还原液流电池中氧化还原活性有机物的利用为大规模和可持续的储能提供了广阔的前景。在这里，我们报告了三种不同的吩嗪衍生物的低温绿色合成，并研究了它们在碱性有机氧化还原液流电池中的性能。电化学表征表明，吩嗪衍生物中羟基的邻位取代基对电池性能具有重大影响。通过在吩嗪基序中的羟基附近引入额外的苯基和具有强增溶作用的羧基，基于稠环苯并[ a]的氧化还原液流电池电子浓度为1.0 M的] hydroxyphenazine-7 / 8-羧酸的容量保持率大大提高，达到了99.986％循环^–1（99.92％天^–1），并且在1300多个循环中的平均平均能量效率约为80％。此外，建立了具有不同取代基的羟基吩嗪衍生物的组合库，并对它们的氧化还原特性进行了模拟，以指导吩嗪衍生的电活性化合物的进一步分子结构设计。

更新日期：2020-01-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11