设计用于可充电质子电池的具有快速动力学的醌基阳极。
Designing Quinone-Based Anodes with Rapid Kinetics for Rechargeable Proton Batteries.
作者信息
Yang Xinru, Ni Youxuan, Lu Yong, Zhang Qiu, Hou Jinze, Yang Gaojing, Liu Xiaomeng, Xie Weiwei, Yan Zhenhua, Zhao Qing, Chen Jun
机构信息
Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Haihe Laboratory of Sustainable Chemical Transformations, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
出版信息
Angew Chem Int Ed Engl. 2022 Sep 26;61(39):e202209642. doi: 10.1002/anie.202209642. Epub 2022 Aug 19.
Quinone compounds, which are capable of accommodating proton (H ), are emerging electrodes in aqueous batteries. However, the storage mechanism of proton in quinone compounds is less known and the energy/power density of quinone-based proton battery is still limited. Here we design a series of quinone anodes and study their electrochemical properties in acidic electrolyte, in which tetramethylquinone (TMBQ) delivers a high capacity of 300 mAh g with an extremely low polarization of 20 mV at 1 C, and maintains over 50 % theoretical capacity in less than 16 seconds. The fast kinetics of TMBQ is attributed to the continuous H migration channel, high H diffusion coefficient (10 cm s ), and low H migration energy barrier (0.26 eV). When coupling with MnO cathode, the battery shows a long lifespan of 4000 cycles with a capacity retention of 77 % at 5 C. This study reveals the proton transport in quinone-electrodes and offers new insights to design advanced aqueous batteries.
醌类化合物能够容纳质子（H⁺），是水系电池中新兴的电极材料。然而，醌类化合物中质子的存储机制尚不清楚，基于醌的质子电池的能量/功率密度仍然有限。在此，我们设计了一系列醌类阳极，并研究了它们在酸性电解质中的电化学性能，其中四甲基苯醌（TMBQ）在1C时具有300 mAh g的高容量和20 mV的极低极化，并且在不到16秒的时间内保持超过50%的理论容量。TMBQ的快速动力学归因于连续的H⁺迁移通道、高H⁺扩散系数（10⁻⁶ cm² s⁻¹）和低H⁺迁移能垒（0.26 eV）。当与MnO₂阴极耦合时，该电池在5C下显示出4000次循环的长寿命，容量保持率为77%。这项研究揭示了醌电极中的质子传输，并为设计先进的水系电池提供了新的见解。
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