Electrophoretically deposited binder-free 3-D carbon/sulfur nanocomposite cathode for high-performance Li–S batteries

作     者：Sasan Ghashghaie Samson Ho-Sum Cheng Jie Fang Hafiz Khurram Shahzad Robin Lok-Wang Ma Chi-Yuen Chung Sasan Ghashghaie;Samson Ho-Sum Cheng;Jie Fang;Hafiz Khurram Shahzad;Robin Lok-Wang Ma;Chi-Yuen Chung

作者机构：Department of Materials Science and EngineeringCity University of Hong KongHong KongChina Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyHong KongChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2020年第29卷第9期

页      面：92-101,I0003页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the City University of Hong Kong through the SRG projects#7004545� support from the Research G rants Council(RGC)of Hong Kong the Hong Kong Ph D Fellowship Scheme(HKPFS) 

主　　题：Electrophoretic deposition Lithium-sulfur batteries Carbon nanotubes C/S nanocomposite 

摘      要：In the present study,the electrophoretic deposition method was successfully applied as a binder-free and scalable approach to deposit carbonaceous nanomaterials on carbon fiber paper(CFP)for cathode applications in Li-S *** microstructural studies of the EPD-CNT film using scanning electron microscopy(SEM)revealed the formation of a crack-free and porous layer of CNTs being uniformly distributed on the CFP *** EPD:CFP/CNT/S cathode delivered a capacity around 2.2 times higher than that obtained in the absence of the EPD-CNT film(CFP/S cell)after 50 cycles and a capacity of935 mAh g^-1 after 100 cycles at 0.1 *** EPD method was then employed to fabricate layer-by-layer structures where the EPD-CNT film was decorated with carbon black *** initial capacity as well as the reversible capacity after 100 cycles was further increased by the EPD:CFP/CNT/KB/S layer-by-layer structure to 1473 and 1033 mAh g^-1,respectively,indicating effective suppression of the shuttle *** addition,the rate performance of CFP/S was improved by depositing the EPD-CNT and EPD-CNT/carbon black architectures on CFP surface,and even further enhanced through the co-deposition of CNT and Pt nanoparticles by EPD,delivering a specific capacity of around 730 mAh g^-1 at 1 ***,the cathodes fabricated by EPD were observed to outperform those made by the conventional casting method in terms of cycling performance,internal resistance,and *** difference was ascribed to the non-uniform microstructure of the Cast-CNT film,which resulted in poor interfacial connection between the CNT agglomerates,hindering uniform sulfide/sulfur deposition during *** obtained results suggested that the binder-free C/S nanocomposite cathode made by EPD is key to further enhance the specific capacity and energy density of Li-S batteries.