A High-Power Aqueous Zinc-Organic Radical Battery with Tunable Operating Voltage Triggered by Selected Anions
A High-Power Aqueous Zinc-Organic Radical Battery with Tunable Operating Voltage Triggered by Selected Anions
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一种由选定阴离子触发工作电压可调的高功率水系有机锌自由基电池
DOI：
10.1002/cssc.201903083
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发表时间：
2020
期刊：
影响因子：
8.4
通讯作者：
Li Fujun
中科院分区：
文献类型：
--
作者：
Luo Yuwen;Zheng Feipeng;Liu Luojia;Lei Kaixiang;Hou Xuesen;Xu Gang;Meng Hui;Shi Jifu;Li Fujun
与传统的可充电岩椅式金属离子电池相比，双离子电池（DIB）涉及p型阴极中的阴离子而不是阳离子的氧化还原反应。原则上，通过不同的阴离子物质调节DIB的电化学性能是高度可行的。本文通过密度泛函理论（DFT）计算研究了阴离子对由聚（2，2，6，6-四甲基哌啶氧基-4-基乙烯基醚）阴极和锌阳极组成的水性锌-有机自由基电池（Zn-ORB）的电化学性能的影响。选择具有不同分子静电势值的SO 42-、CF 3SO 3-和ClO 4-作为阴离子模型。DFT计算表明，阴离子与有机自由基的静电相互作用越强，Zn-ORB的工作电压越高，这与实验结果一致。这些结果为p型有机自由基与阴离子的氧化还原化学带来了新的见解，将促进高功率水性Zn-ORB的发展，并激发更多关于阴离子效应的研究，以实现新型电池设计。
In contrast to traditional rechargeable rock‐chair metal‐ion batteries, dual‐ion batteries (DIBs) involve redox reactions with anions rather than cations in p‐type cathodes. In principle, regulating the electrochemical performance of the DIB by different anion species is highly feasible. Herein, the anion effect on the electrochemical performance of a DIB, the aqueous Zn– organic radical battery (Zn‐ORB), consisting of a poly(2,2,6,6tetramethylpiperidinyloxy‐4‐yl vinyl ether) cathode and a Zn anode, was investigated by DFT calculations. SO42−, CF3SO3−, and ClO4−with different molecular electrostatic potential values were selected as anion models. DFT calculations revealed that a stronger electrostatic interaction of the anion with the organic radical resulted in a higher operating voltage of the Zn‐ORB, which was consistent with experimental results. These results bring new insight into the redox chemistry of p‐type organic radicals with anions and will promote the development of high‐power aqueous Zn‐ORBs as well as inspire more investigations into the anion effect towards novel battery designs.