SWNT Anchored with Carboxylated Polythiophene ‘Links’ on High-Capacity Li-Ion Battery Anode Materials,Journal of the American Chemical Society

当前位置： X-MOL 学术 › J. Am. Chem. Soc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

SWNT Anchored with Carboxylated Polythiophene ‘Links’ on High-Capacity Li-Ion Battery Anode Materials
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-03-10 , DOI: 10.1021/jacs.8b00693
Yo Han Kwon , Krysten Minnici , Jung Jin Park ₁ , Sujin R. Lee , Guoyan Zhang , Esther S. Takeuchi ₂ , Kenneth J. Takeuchi , Amy C. Marschilok ₂ , Elsa Reichmanis

Affiliation

Conjugated polymers possessing polar functionalities were shown to effectively anchor single-walled carbon nanotubes (SWNTs) to the surface of high-capacity anode materials and enable the formation of electrical networks. Specifically, poly[3-(potassium-4-butanoate) thiophene] (PPBT) served as a bridge between SWNT networks and various anode materials, including monodispersed Fe3O4 spheres (sFe3O4) and silicon nanoparticles (Si NPs). The PPBT π-conjugated backbone and carboxylate (COO-) substituted alkyl side chains, respectively, attracted the SWNT π-electron surface and chemically interacted with active material surface hydroxyl (-OH) species to form a carboxylate bond. Beneficially, this architecture effectively captured cracked/pulverized particles that typically form as a result of repeated active material volume changes that occur during charging and discharging. Thus, changes in electrode thickness were suppressed substantially, stable SEI layers were formed, electrode resistance was reduced, and enhanced electrode kinetics was observed. Together, these factors led to excellent electrochemical performance.

中文翻译：

SWNT 锚定在高容量锂离子电池负极材料上的羧化聚噻吩“链接”

具有极性官能团的共轭聚合物被证明可以有效地将单壁碳纳米管 (SWNT) 锚定到高容量阳极材料的表面，并能够形成电网络。具体而言，聚[3-(4-丁酸钾)噻吩] (PPBT) 作为 SWNT 网络和各种阳极材料之间的桥梁，包括单分散的 Fe3O4 球体 (sFe3O4) 和硅纳米颗粒 (Si NPs)。PPBT π-共轭主链和羧酸盐 (COO-) 取代的烷基侧链分别吸引 SWNT π-电子表面并与活性材料表面的羟基 (-OH) 物质发生化学相互作用以形成羧酸盐键。有利的是，这种结构有效地捕获了破裂/粉碎的颗粒，这些颗粒通常是由于充电和放电过程中发生的活性材料体积重复变化而形成的。因此，电极厚度的变化得到显着抑制，形成稳定的 SEI 层，降低电极电阻，并观察到增强的电极动力学。这些因素共同导致了优异的电化学性能。

更新日期：2018-03-10

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11