Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, 1 Gwanak Road, Seoul 151-742, Republic of Korea.
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea.
Nat Commun. 2014 Oct 31;5:5335. doi: 10.1038/ncomms6335.
The use of biologically occurring redox centres holds a great potential in designing sustainable energy storage systems. Yet, to become practically feasible, it is critical to explore optimization strategies of biological redox compounds, along with in-depth studies regarding their underlying energy storage mechanisms. Here we report a molecular simplification strategy to tailor the redox unit of pteridine derivatives, which are essential components of ubiquitous electron transfer proteins in nature. We first apply pteridine systems of alloxazinic structure in lithium/sodium rechargeable batteries and unveil their reversible tautomerism during energy storage. Through the molecular tailoring, the pteridine electrodes can show outstanding performance, delivering 533 Wh kg(-1) within 1 h and 348 Wh kg(-1) within 1 min, as well as high cyclability retaining 96% of the initial capacity after 500 cycles at 10 A g(-1). Our strategy combined with experimental and theoretical studies suggests guidance for the rational design of organic redox centres.
生物氧化还原中心的应用在设计可持续储能系统方面具有巨大的潜力。然而，要使其具有实际可行性，关键是要探索生物氧化还原化合物的优化策略，并深入研究其潜在的储能机制。在这里，我们报告了一种分子简化策略，用于调整蝶啶衍生物的氧化还原单元，蝶啶衍生物是自然界中普遍存在的电子转移蛋白的重要组成部分。我们首先将蝶啶系统应用于锂/钠可充电电池，并揭示了它们在储能过程中的可逆互变异构现象。通过分子剪裁，蝶啶电极可以表现出优异的性能，在 1 小时内提供 533 Wh kg(-1)，在 1 分钟内提供 348 Wh kg(-1)，并且在 10 A g(-1)下循环 500 次后仍能保持 96%的初始容量。我们的策略结合实验和理论研究为合理设计有机氧化还原中心提供了指导。
