文献类型：期刊文献

英文题名：Covalently Functionalized Graphene by Radical Polymers for Graphene-Based High-Performance Cathode Materials

作者：Li, Yongjun[1];Jian, Zukai[1,2];Lang, Meidong[2];Zhang, Chunming[3];Huang, Xiaoyu[1]

机构：[1]Chinese Acad Sci, Shanghai Inst Organ Chem, Key Lab Synthet & Selfassembly Chem Organ Funct M, 345 Lingling Rd, Shanghai 200032, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Natl Engn Res Ctr Nanotechnol, 28 East Jiangchuan Rd, Shanghai 200241, Peoples R China

年份：2016

卷号：8

期号：27

起止页码：17352

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20162902622245);WOS:【SCI-EXPANDED(收录号:WOS:000379794100040)】；

基金：The authors acknowledge the financial support from National Basic Research Program of China (2015CB931900), National Natural Science Foundation of China (21204098), and Shanghai Scientific and Technological Innovation Project (14JC1493400).

语种：英文

外文关键词：graphene; covalent functionalization; radical polymer; composite material; cathode

摘要：Polymer-functionalized graphene sheets play an important role in graphene-containing composite materials. Herein, functionalized graphene sheets covalently linked with radical polymer, graphene-graft-poly(2,2,6,6-tetramethylpiperidin-1-oxy1-4-yl methacrylate) (G-g-PTMA), were prepared via surface-initiated atom transfer radical polymerization (SI-ATRP). A composite cathode with G-g-PTMA as major active material and reduced graphene oxide (RGO) as conductive additive was fabricated via a simple dispersing depositing process, and this composite cathode exhibited a relatively high specific capacity up to 466 mAh g(-1) based on the mass of PTMA, which is much higher than the theoretical capacity of PTMA. This extraordinary electrochemical performance is attributed to the fast one-electron redox reaction of G-g-PTMA and surface Faradaic reaction of RGO boosted by G-g-PTMA, which suggested that G-g-PTMA sheets play a dual role in the composite materials, that is, on the one hand provided the fast one-electron redox reaction of PTMA and on the other hand worked as nanofiller for facilitating the surface Faradaic reaction-based lithium storage of RGO.