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An Insoluble Anthraquinone Dimer with Near-Plane Structure as a Cathode Material for Lithium-Ion Batteries.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-01-10 , DOI: 10.1002/cssc.201903227 Jixing Yang 1, 2 , Hai Su 1 , Zhuanping Wang 1 , Pengfei Sun 1 , Yunhua Xu 1, 3
ChemSusChem ( IF 7.5 ) Pub Date : 2020-01-10 , DOI: 10.1002/cssc.201903227 Jixing Yang 1, 2 , Hai Su 1 , Zhuanping Wang 1 , Pengfei Sun 1 , Yunhua Xu 1, 3
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Conjugated carbonyl-based organic electrode materials for lithium-ion batteries have gained increasing interests owing to their many advantages such as resource abundance and sustainable development. However, serious dissolution in organic liquid electrolytes is often encountered, resulting in inferior electrochemical performance such as poor cycling stability. Herein, a new molecular design strategy was developed to address the dissolution issue of 9,10-anthraquinone (AQ). An AQ dimer with near-plane molecular structure, 1,4-bis(9,10-anthraquinonyl)benzene (BAQB), was facilely synthesized. The near-plane structure was proved by DFT calculations. It was found that the obtained BAQB was insoluble in ether electrolyte. Compared to AQ, BAQB displayed remarkably enhanced cycling stability. After 100 cycles at 0.2 C, a high capacity retention of 91.6 % was achieved (195 mAh g-1 ). BAQB also exhibited excellent rate performance (138 mAh g-1 at 10 C). The results demonstrate the effectiveness of the near-plane molecular design concept. This work provides a new idea for rational molecular design to inhibit the dissolution of conjugated carbonyl-based organic electrode materials.
中文翻译：
具有近平面结构的不溶蒽醌二聚体，作为锂离子电池的阴极材料。
用于锂离子电池的共轭羰基有机电极材料因其资源丰富和可持续发展等诸多优势而受到越来越多的关注。然而，经常会遇到在有机液体电解质中的严重溶解，从而导致电化学性能变差，例如循环稳定性差。在本文中，开发了一种新的分子设计策略来解决9,10-蒽醌（AQ）的溶解问题。易于合成具有近平面分子结构的AQ二聚体1,4-双（9,10-蒽醌基）苯（BAQB）。通过DFT计算证明了近平面结构。发现所获得的BAQB不溶于醚电解质。与AQ相比，BAQB表现出明显增强的循环稳定性。在0.2 C下进行100次循环后，容量保持率高达91。达到6％（195 mAh g-1）。BAQB还表现出出色的速率性能（在10 C下为138 mAh g-1）。结果证明了近平面分子设计概念的有效性。这项工作为合理的分子设计提供了新的思路，以抑制共轭羰基有机电极材料的溶解。
更新日期：2020-01-10
中文翻译：
具有近平面结构的不溶蒽醌二聚体，作为锂离子电池的阴极材料。
用于锂离子电池的共轭羰基有机电极材料因其资源丰富和可持续发展等诸多优势而受到越来越多的关注。然而，经常会遇到在有机液体电解质中的严重溶解，从而导致电化学性能变差，例如循环稳定性差。在本文中，开发了一种新的分子设计策略来解决9,10-蒽醌（AQ）的溶解问题。易于合成具有近平面分子结构的AQ二聚体1,4-双（9,10-蒽醌基）苯（BAQB）。通过DFT计算证明了近平面结构。发现所获得的BAQB不溶于醚电解质。与AQ相比，BAQB表现出明显增强的循环稳定性。在0.2 C下进行100次循环后，容量保持率高达91。达到6％（195 mAh g-1）。BAQB还表现出出色的速率性能（在10 C下为138 mAh g-1）。结果证明了近平面分子设计概念的有效性。这项工作为合理的分子设计提供了新的思路，以抑制共轭羰基有机电极材料的溶解。
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