Interwoven MXene Nanosheet/Carbon-Nanotube Composites as Li-S Cathode Hosts

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• 作者：Xiao Liang ; Yverick Rangom ; Chun Yuen Kwok ; Quan Pang and Linda F. Nazar
• 刊名：Advanced Materials
• 出版年：2017
• 出版时间：January 18, 2017
• 年：2017
• 卷：29
• 期：3
• 全文大小：2016K
• ISSN：1521-4095

文摘

The complex surface chemistry that dictates the interaction between MXene and polysulfides – the formation of thiosulfate via consumption of –OH surface groups, followed by Lewis acid–base interaction between the exposed Ti atoms and polysulfides – is unravelled. Interweaving carbon nanotubes between the MXene layers creates a porous, conductive network with high polysulfide adsorptivity, enabling sulfur hosts with excellent performance even at high loading (5.5 mg cm^–2).