Edge-Fluorinated Graphene Nanoplatelets as High Performance Electrodes for Dye-Sensitized Solar Cells and Lithium Ion Batteries

被引：238

作者：

Jeon, In-Yup ^{[1
]}

Ju, Myung Jong ^{[2
,3
]}

Xu, Jiantie ^{[4
]}

Choi, Hyun-Jung ^{[1
]}

Seo, Jeong-Min ^{[1
]}

Kim, Min-Jung ^{[1
]}

Choi, In Taek ^{[2
,3
]}

Kim, Hong Mo ^{[2
,3
]}

Kim, Jae Cheon ^{[5
,6
]}

Lee, Jae-Joon ^{[5
,6
]}

Liu, Hua Kun ^{[4
]}

Kim, Hwan Kyu ^{[2
,3
]}

Dou, Shixue ^{[4
]}

Dai, Liming ^{[7
]}

Baek, Jong-Beom ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Technol, Sch Energy Engn, Low Dimens Carbon Mat Ctr, Ulsan 689798, South Korea

[2] Korea Univ, Global GET Future Lab, Sejong 339700, South Korea

[3] Korea Univ, Dept Adv Mat Chem, Sejong 339700, South Korea

[4] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[5] Konkuk Univ, Nanotechnol Res Ctr, Chungju 380701, South Korea

[6] Konkuk Univ, Dept Appl Life Sci, Chungju 380701, South Korea

[7] Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2015年 / 25卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

OXYGEN REDUCTION REACTION; METAL-FREE ELECTROCATALYSTS; FUNCTIONALIZED GRAPHENE; STORAGE DEVICES; NANOSTRUCTURED MATERIALS; ENERGY-CONVERSION; GRAPHITE; SURFACE; CAPACITY; SHEETS;

D O I：

10.1002/adfm.201403836

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Edge-selectively fluorinated graphene nanoplatelets (FGnPs) are prepared by mechanochemically driven reaction between fluorine gas (20 vol% in argon) and activated carbon species from graphitic C-C bonds unzipped by high-speed stainless steel balls with a high kinetic energy. The fluorination at edges of the unzipped graphene nanoplatelets (GnPs) is confirmed by various analytical techniques while the content of fluorine in FGnPs is determined to be 3.0 and 3.4 at% by X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy, respectively. Because of the large difference in electron-egativity between carbon (chi = 2.55) and fluorine (chi = 3.98) and the strong C-F bond, the edge-fluorination of GnPs can provide the maximized charge polarization with an enhanced chemical stability. Thus, electrodes based on the resultant FGnPs demonstrate superb electrochemical performance with excellent stability/cycle life in dye-sensitized solar cells (FF: 71.5%; J(sc) : 14.44 mA cm(-2); V-oc : 970 mV; PCE: 10.01%) and lithium ion batteries (650.3 mA h g(-1) at 0.5 C, charge retention of 76.6% after 500 cycles).

引用

页码：1170 / 1179

页数：10

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