Ortho-di-sodium salts of tetrahydroxyquinone as a novel electrode for lithium-ion and potassium-ion batteries
Ortho-di-sodium salts of tetrahydroxyquinone as a novel electrode for lithium-ion and potassium-ion batteries
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四羟基醌的邻二钠盐作为锂离子和钾离子电池的新型电极
DOI：
10.1016/j.electacta.2018.10.075
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发表时间：
2019-01-20
影响因子：
6.6
通讯作者：
Zhao, Yanming
中科院分区：
文献类型：
--
作者：
Chen, Lei;Liu, Shenghong;Zhao, Yanming
有机电极材料具有价格低廉、结构多样、资源丰富和可再生等优点，被认为是可充电电池的有前景的候选材料。然而，较差的电子传导性和在非质子电解质中的强溶解度限制了储能系统的应用。在这里，通过简单的盐化过程成功设计了四羟基醌的邻二钠盐（o-Na2C6H2O6）。受益于盐的形成，o-Na2C6H2O6电极首次应用于锂离子电池和钾离子电池时表现出潜在的电化学性能。对于锂离子电池，它在25 mA g(-1)倍率下具有超过100次循环的141mAh g(-1)的良好可逆容量，在5 A g(-1)倍率下具有55.0mAh g(-1)的出色倍率性能，以及在5 A g(-1)倍率下超过2000次循环时容量衰减为0.0075%的长循环性能。另一方面，o-Na2C6H2O6在K离子电池中也表现出在25 mA g(-1)电流密度下高达168.1mAh g(-1)的高可逆容量，以及良好的倍率性能(5 A g(-1)倍率下为26.7 mA h g(-1))。这一发现可能为开发用于锂离子和钾离子电池的其他有机盐材料提供有效的见解。 (c) 2018 Elsevier Ltd. 保留所有权利。
Organic electrode materials with superiorities of low price, structural diversity, abundant resources and renewability have been regarded as the promising candidates for rechargeable batteries. However, the poor electronic conductivity and strong solubility in aprotic electrolytes limit the applications for energy storage systems. Here, the ortho-di-sodium salts of tetrahydroxyquinone (o-Na2C6H2O6) was successfully designed via a facile salinization process. Benefitted from the salt formation, the o-Na2C6H2O6 electrode exhibits a potential electrochemical performance, when applied to lithium-ion batteries and potassiumion batteries for the first time. For Li-ion batteries, it delivers a good reversible capacity of 141mA h g(-1) over 100 cycles at 25 mA g(-1), outstanding rate performance of 55.0mA h g(-1) at 5 A g(-1) rate and the long cyclability with a capacity decay of 0.0075% per cycle at 5 A g(-1) exceeding 2000 cycles. On the other hand, the o-Na2C6H2O6 also exhibits a high reversible capacity of 168.1mA h g(-1) under the current density of 25 mA g(-1), good rate performance (26.7 mA h g(-1) at 5 A g(-1) rate) in the K-ion cells. This finding might offer an effective insight to develop other organic salt materials for lithium-ion and potassium-ion batteries. (c) 2018 Elsevier Ltd. All rights reserved.