Polyoxovanadate-alkoxide clusters as multi-electron charge carriers for symmetric non-aqueous redox flow batteries†,Chemical Science

当前位置： X-MOL 学术 › Chem. Sci. › 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.)

Polyoxovanadate-alkoxide clusters as multi-electron charge carriers for symmetric non-aqueous redox flow batteries†
Chemical Science ( IF 7.6 ) Pub Date : 2018-01-08 00:00:00 , DOI: 10.1039/c7sc05295b
L. E. VanGelder _{1,

2,

3,

4} , A. M. Kosswattaarachchi _{1,

4,

5,

6,

7} , P. L. Forrestel _{1,

2,

3,

4} , T. R. Cook _{1,

4,

5,

6,

7} , E. M. Matson _{1,

2,

3,

4}

Affiliation

Non-aqueous redox flow batteries have emerged as promising systems for large-capacity, reversible energy storage, capable of meeting the variable demands of the electrical grid. Here, we investigate the potential for a series of Lindqvist polyoxovanadate-alkoxide (POV-alkoxide) clusters, [V₆O₇(OR)₁₂] (R = CH₃, C₂H₅), to serve as the electroactive species for a symmetric, non-aqueous redox flow battery. We demonstrate that the physical and electrochemical properties of these POV-alkoxides make them suitable for applications in redox flow batteries, as well as the ability for ligand modification at the bridging alkoxide moieties to yield significant improvements in cluster stability during charge–discharge cycling. Indeed, the metal–oxide core remains intact upon deep charge–discharge cycling, enabling extremely high coulombic efficiencies (∼97%) with minimal overpotential losses (∼0.3 V). Furthermore, the bulky POV-alkoxide demonstrates significant resistance to deleterious crossover, which will lead to improved lifetime and efficiency in a redox flow battery.

中文翻译：

聚氧钒酸盐-醇盐簇作为对称的非水氧化还原液流电池的多电子电荷载体†

非水氧化还原液流电池已经成为大容量，可逆储能的有前途的系统，能够满足电网的各种需求。在这里，我们研究了一系列Lindqvist聚氧钒酸盐-醇盐（POV-醇盐）簇的潜力，[V ₆ O ₇（OR）₁₂ ]（R = CH ₃，C ₂ H ₅），用作对称的非水氧化还原液流电池的电活性物质。我们证明了这些POV醇盐的物理和电化学特性使其适合用于氧化还原液流电池，以及在桥接醇盐部分进行配体修饰的能力，从而在充放电循环过程中显着改善了簇的稳定性。确实，金属氧化物核在深层充放电循环后仍保持完好无损，从而实现了极高的库仑效率（约97％）和最小的过电势损耗（约0.3 V）。此外，大体积的POV醇盐显示出对有害交叉的显着耐受性，这将导致氧化还原液流电池的使用寿命和效率提高。

更新日期：2018-01-08

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本刊介绍/投稿指南11