In Situ Electrochemical Synthesis of Novel Lithium-Rich Organic Cathodes for All-Organic Li-Ion Full Batteries,ACS Applied Materials & Interfaces

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In Situ Electrochemical Synthesis of Novel Lithium-Rich Organic Cathodes for All-Organic Li-Ion Full Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-08-20 00:00:00 , DOI: 10.1021/acsami.9b10592
Yang Hu ₁ , Wu Tang ₁ , Qihang Yu ₁ , Chuluo Yang ₂ , Cong Fan ₁

Affiliation

The lithium-rich organic cathodes are undoubtedly important for fabricating lithium-ion (Li-ion) full batteries. Currently, very few lithium-rich organic cathodes have been reported for their O₂-sensitive characteristics. In this article, we initially propose a new electrochemical method to in situ synthesize a novel lithium-rich organic cathode, namely lithium anthracene-9,10-bis[2-benzene-1,4-bis(olate)] (ABB4OLi, C_T = 256 mA h g^–1), from its phenol precursor of anthracene-9,10-bis(2-benzene-1,4-diol). The addition of anthracene moiety as the linking bridge is to increase the molecular weight and simultaneously enhance the electronic conductivity for the designed organic molecule (ABB4OLi). In Li-ion half cells, ABB4OLi could deliver average specific capacities of 194 mA h g^–1 during 250 cycles (50 mA g^–1) and 100 mA h g^–1 during 400 cycles (2 A g^–1). In the all-organic Li-ion full cells with the working voltage above 1 V, the ABB4OLi electrode could realize the average capacities of 70 mA h g^–1_cathode during 200 cycles (50 mA g^–1). This work has forwarded a significant step for the development of organic Li-ion full batteries.

中文翻译：

全有机锂离子全电池新型富锂有机阴极的原位电化学合成

富锂有机阴极无疑对于制造锂离子（Li离子）充满电池非常重要。目前，很少有富锂有机阴极因其对O ₂敏感的特性而被报道。在本文中，我们首先提出了一种新的电化学方法，以原位合成新型的富锂有机阴极，即蒽-9,10-双[2-苯-1,4-双（油酸酯）锂]（ABB4OLi，C _T = 256 mA汞^–1），由蒽-9,10-双（2-苯-1,4-二醇）的酚前体制成。蒽部分作为连接桥的添加是为了增加分子量并同时提高所设计的有机分子（ABB4OLi）的电子电导率。在锂离子半电池中，ABB4OLi在250个循环（50 mA g ^–1）内可提供194 mA hg ^–1的平均比容量，在400个循环（2 A g ^–1）内可提供100 mA hg ^–1的平均比容量。在工作电压高于1 V的全有机锂离子全电池中，ABB4OLi电极在200个循环中可实现70 mA hg ^–1_阴极的平均容量（50 mA g ^–1）。这项工作为有机锂离子充满电池的开发迈出了重要的一步。

更新日期：2019-08-20

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