Halogenated Carboxylates as Organic Anodes for Stable and Sustainable Sodium-Ion Batteries
Halogenated Carboxylates as Organic Anodes for Stable and Sustainable Sodium-Ion Batteries
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DOI：
10.1021/acsami.2c07383
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发表时间：
2022-09-01
影响因子：
9.5
通讯作者：
Luo, Chao
中科院分区：
文献类型：
--
作者：
Huang, Jinghao;Callender, Kachief I. E.;Luo, Chao
有机材料作为钠离子电池（NIB）的阳极由于低成本、丰富、环境友好和高可持续性而具有竞争力。本文中，我们合成了三种基于卤代羧酸盐的有机阳极材料，以利用卤素原子（F、Cl和Br）对NIB中羧酸盐阳极的电化学性能的影响。氟化羧酸盐阳极，2，5-二氟对苯二甲酸二钠（DFTP-Na），优于其他羧酸盐阳极与H，Cl，和Br，在高比容量（212 mA h g-1），长循环寿命（300次），和高倍率性能（高达5 A g-1）。实验和计算结果表明，DFTP中的两个F原子降低了溶解度，提高了循环稳定性，并在氧化还原反应期间与Na+相互作用，从而在NIB中形成高容量和稳定的有机阳极材料。因此，这项工作证明，氟化羧酸盐化合物是开发高性能有机阳极的有效方法，可用于稳定和可持续的NIB。
Organic materials are competitive as anodes for Na-ion batteries (NIBs) due to the low cost, abundance, environmental benignity, and high sustainability. Herein, we synthesized three halogenated carboxylate-based organic anode materials to exploit the impact of halogen atoms (F, Cl, and Br) on the electrochemical performance of carboxylate anodes in NIBs. The fluorinated carboxylate anode, disodium 2, 5-difluoroterephthalate (DFTP-Na), outperforms the other carboxylate anodes with H, Cl, and Br, in terms of high specific capacity (212 mA h g-1), long cycle life (300 cycles), and high rate capability (up to 5 A g-1). As evidenced by the experimental and computational results, the two F atoms in DFTP reduce the solubility, enhance the cyclic stability, and interact with Na+ during the redox reaction, resulting in a high-capacity and stable organic anode material in NIBs. Therefore, this work proves that fluorinating carboxylate compounds is an effective approach to developing high-performance organic anodes for stable and sustainable NIBs.