Ion selective separators based on graphene oxide for stabilizing lithium organic batteries,Inorganic Chemistry Frontiers

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Ion selective separators based on graphene oxide for stabilizing lithium organic batteries
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-05-29 00:00:00 , DOI: 10.1039/c8qi00374b
Yuede Pan _{1,

2,

3,

4,

5} , Junran Hao _{1,

2,

3,

4,

5} , Xuanbo Zhu _{1,

2,

3,

4,

5} , Yahong Zhou _{1,

2,

3,

4,

5} , Shu-Lei Chou _{6,

7,

8,

9}

Affiliation

Ion selective membranes exist widely in the biological world and have been mimicked by scientists and engineers for the purpose of manipulating ion flow. For instance, polymers with sulfonate groups like Nafion are applied in proton exchange membrane fuel cells for facilitating proton transport whilst blocking other species. Herein, ion selective separators composed of graphene oxide (GO) and Super P (or graphene) are applied for stabilizing lithium organic batteries. The reconstructed GO sheets form numerous negatively charged nanochannels, which selectively allow the transport of lithium ions and reject the electroactive organic anions. Meanwhile, Super P (or graphene) on top of the coating layer functions as the upper current collector for reactivating the electroactive organic species. In this work, two typical carbonyl electrode materials with, respectively, two (anthraquinone, AQ) and four (perylene-3,4,9,10-tetracarboxylic dianhydride, PTCDA) carbonyl groups are applied as examples. Compared to the pristine Celgard separator, the ion selective separators enable significantly alleviated self-discharge, improved coulombic efficiency and cycling stability.

中文翻译：

基于氧化石墨烯的离子选择性隔板，用于稳定锂有机电池

离子选择性膜在生物界广泛存在，并已被科学家和工程师模仿以操纵离子流。例如，具有磺酸根基团的聚合物如Nafion被应用于质子交换膜燃料电池中，以促进质子的运输，同时阻止其他物质。在本文中，由氧化石墨烯（GO）和Super P（或石墨烯）组成的离子选择性隔板被用于稳定锂有机电池。重建的GO片形成许多带负电的纳米通道，这些通道选择性地允许锂离子的传输并排斥电活性有机阴离子。同时，在涂层的顶部上的Super P（或石墨烯）用作用于使电活性有机物质再活化的上部集电器。在这项工作中，例如，使用两种典型的分别具有两个（蒽醌，AQ）和四个（per-3,4,9,10-四羧酸二酐，PTCDA）羰基的羰基电极材料。与原始的Celgard分离器相比，离子选择性分离器能够显着减轻自放电，提高库仑效率和循环稳定性。

更新日期：2018-05-29

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