Understanding the function of cetyltrimethyl ammonium bromide in lithium/sulfur cells,Journal of Materials Chemistry A

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Understanding the function of cetyltrimethyl ammonium bromide in lithium/sulfur cells
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-10-18 00:00:00 , DOI: 10.1039/c7ta07522g
Ayako Kawase _{1,

2,

3,

4} , Elton J. Cairns _{1,

2,

3,

4,

5}

Affiliation

A surfactant material plays a significant role in creating a sulfur/carbon composite for lithium/sulfur cells. CTAB (cetyltrimethylammoniumbromide) is a widely used surfactant material in various fields. In this study we identified the functions of CTAB in a sulfur–graphene oxide composite used as the cathode material for lithium/sulfur cells, and the key features for enhancing the capacity of the cells. The CTAB added in the synthesis procedure reacts with polysulfides during the 155 °C heat treatment and produces cetylamine, cetylmethylamine, cetyldimetylamine, and dimethylpolysulfide as products. Furthermore the composite produced by the reactions between cetyldimetylamine and sulfur cover the surface of the sulfur. These work to enhance the performance of the cells. The findings presented here can be applied to various kinds of sulfur/carbon composites to enhance the performance of the sulfur electrode.

中文翻译：

了解十六烷基三甲基溴化铵在锂/硫电池中的功能

表面活性剂材料在产生用于锂/硫电池的硫/碳复合物中起着重要作用。CTAB（十六烷基三甲基溴化铵）是在各个领域中广泛使用的表面活性剂材料。在这项研究中，我们确定了CTAB在用作锂/硫电池正极材料的硫-氧化石墨烯复合材料中的功能，以及增强电池容量的关键特征。在155°C的热处理过程中，合成步骤中添加的CTAB与多硫化物反应，生成十六烷基胺，十六烷基甲基胺，十六烷基二甲胺和二甲基多硫化物。此外，由十六烷基二甲胺与硫反应生成的复合材料覆盖了硫的表面。这些工作增强了细胞的性能。

更新日期：2017-11-14

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