Structural and electrochemical modification of graphitic carbons by vapor-phase iodine-incorporation

被引：19

作者：

Barpanda, P. ^{[1
]}

Djellab, K. ^{[1
]}

Sadangi, R. K. ^{[2
]}

Sahu, A. K. ^{[3
]}

Roy, D. ^{[4
]}

Sun, K. ^{[5
]}

机构：

[1] Univ Picardie, Lab React & Chim Solides, CNRS, UMR6007, F-80039 Amiens, France

[2] Rutgers State Univ, Dept Mat Sci & Engn, Piscataway, NJ 08854 USA

[3] Natl Inst Technol, Dept Ceram Engn, Ctr Relevance & Excellence CORE, Rourkela 769008, Orissa, India

[4] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

[5] Univ Michigan, EMAL, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

来源：

CARBON | 2010年 / 48卷 / 14期

关键词：

X-RAY-DIFFRACTION; ACTIVATED CARBONS; NANOTUBES; POLYIODIDE; STORAGE; SUPERCAPACITORS; ELECTRODES; MOLECULES; ENERGY; CELL;

D O I：

10.1016/j.carbon.2010.07.038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pristine and mechanically-milled graphitic carbons were chemically modified by vapor-phase iodine-incorporation The effectiveness of iodine uptake during vapor iodation was gauged for pristine and mechanically-milled graphite The doping of electronegative iodine, which is capable of triggering charge transfer reaction with carbon, was found to develop structural disordering, carbon-polyiodide covalent compounds (C-I-3, C-I-S), enhanced mesoporosity and reduced BET surface area in graphitic carbons These intrinsic changes in iodine-modified graphite led to improved non-faradaic capacitance and development of faradaic pseudocapacitive reaction at similar to 3 2 V versus Li As a result, iodation develops manifold (similar to 100%) increment in gravimetric and volumetric capacity of precursor graphite, when tested versus Li The effect of iodine-incorporation on physical and electrochemical properties of graphite is reported in detail (C) 2010 Elsevier Ltd All rights reserved

引用

页码：4178 / 4189

页数：12

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