Effects of activation temperature on the deoxygenation, specific surface area and supercapacitor performance of graphene

Abstract This paper systematically studies the influence of temperature during KOH activation of graphene on quantities and types of oxygen-containing groups, pore structure, specific surface area, and performance of supercapacitor. The changes of the amount and types of oxygen-containing functional groups were observed with the aid of Fourier transform infrared spectroscopy, Raman and X-ray photoelectron spectroscopy. The pore structure and specific surface area were characterized by means of X-ray powder diffraction, N2 adsorption-desorption and transmission electron microscopy. Electrochemical properties were assessed by cyclic voltammetry, electrochemical impedance and galvanostatic charge-discharge. As the temperature increased, the oxygen content of activated graphene decreased, while its specific surface area increased. The specific capacitance of the activated graphene first increased and then decreased with a maximum (326 F/g) at 400 °C. When the temperature was 800 °C, the surface area of the material peaked (3269 m2/g), and the specific capacitance was 204 F/g.

[1]  P. Cheng,et al.  Activation of graphene aerogel with phosphoric acid for enhanced electrocapacitive performance , 2015 .

[2]  Luwei Chen,et al.  One-step synthesis of NH2-graphene from in situ graphene-oxide reduction and its improved electrochemical properties , 2011 .

[3]  Yuyuan Tian,et al.  Measurement of the quantum capacitance of graphene. , 2009, Nature nanotechnology.

[4]  B. Scrosati,et al.  The role of graphene for electrochemical energy storage. , 2015, Nature materials.

[5]  Jong-Min Lee,et al.  Graphene for supercapacitor applications , 2013 .

[6]  Vivek B Shenoy,et al.  Structural evolution during the reduction of chemically derived graphene oxide. , 2010, Nature chemistry.

[7]  F. Béguin,et al.  Carbon/carbon supercapacitors , 2013 .

[8]  Guangbin Ji,et al.  Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors , 2010 .

[9]  Y. Gogotsi,et al.  Materials for electrochemical capacitors. , 2008, Nature materials.

[10]  B. Dunn,et al.  Where Do Batteries End and Supercapacitors Begin? , 2014, Science.

[11]  Yong Jiang,et al.  Supercapacitor performances of thermally reduced graphene oxide , 2012 .

[12]  M. Shaijumon,et al.  Activated graphene-derived porous carbon with exceptional gas adsorption properties , 2015 .

[13]  François Béguin,et al.  Relationship between the nanoporous texture of activated carbons and their capacitance properties in different electrolytes , 2006 .

[14]  D. Basko,et al.  Raman spectroscopy as a versatile tool for studying the properties of graphene. , 2013, Nature nanotechnology.

[15]  SUPARNA DUTTASINHA,et al.  Graphene: Status and Prospects , 2009, Science.

[16]  Cheng-an Tao,et al.  Chemically functionalized graphene/polymer nanocomposites as light heating platform , 2016 .

[17]  F. Béguin,et al.  Electrochemical storage of energy in carbon nanotubes and nanostructured carbons , 2002 .

[18]  F. Béguin,et al.  Unusual energy enhancement in carbon-based electrochemical capacitors , 2012 .

[19]  Michelle Foster,et al.  Carbon surface functionalities and SEI formation during Li intercalation. , 2015 .

[20]  S. Yumitori.  Correlation of C1s chemical state intensities with the O1s intensity in the XPS analysis of anodically oxidized glass-like carbon samples , 2000 .

[21]  R. Ruoff,et al.  The chemistry of graphene oxide. , 2010, Chemical Society reviews.

[22]  C. N. Lau,et al.  Controlled ripple texturing of suspended graphene and ultrathin graphite membranes. , 2009, Nature nanotechnology.

[23]  François Béguin,et al.  A new type of high energy asymmetric capacitor with nanoporous carbon electrodes in aqueous electrolyte , 2010 .

[24]  Jie Lian,et al.  Flexible free-standing graphene–TiO2 hybrid paper for use as lithium ion battery anode materials , 2013 .

[25]  Qiang Zhang,et al.  Structural evolution during annealing of thermally reduced graphene nanosheets for application in supercapacitors , 2012 .

[26]  A. Macková,et al.  Insight into the mechanism of the thermal reduction of graphite oxide: deuterium-labeled graphite oxide is the key. , 2015, ACS nano.

[27]  Kian Ping Loh,et al.  Hydrothermal Dehydration for the “Green” Reduction of Exfoliated Graphene Oxide to Graphene and Demonstration of Tunable Optical Limiting Properties , 2009 .

[28]  Drew C. Higgins,et al.  Activated and nitrogen-doped exfoliated graphene as air electrodes for metal–air battery applications , 2013 .

[29]  R. Ruoff,et al.  Carbon-Based Supercapacitors Produced by Activation of Graphene , 2011, Science.

[30]  John R. Miller,et al.  Electrochemical Capacitors for Energy Management , 2008, Science.

[31]  E. Frąckowiak.  Carbon materials for supercapacitor application. , 2007, Physical chemistry chemical physics : PCCP.

[32]  X. Jia,et al.  Bulk production of a new form of sp(2) carbon: crystalline graphene nanoribbons. , 2008, Nano letters.

[33]  Shiqiao Qin,et al.  Fabrication of pH-sensitive graphene oxide–drug supramolecular hydrogels as controlled release systems , 2012 .

[34]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[35]  Taeyoung Kim,et al.  Activated graphene-based carbons as supercapacitor electrodes with macro- and mesopores. , 2013, ACS nano.

[36]  Yanwu Zhu,et al.  Highly conductive and porous activated reduced graphene oxide films for high-power supercapacitors. , 2012, Nano letters.

[37]  X. Lou,et al.  Controlled synthesis of hierarchical NiO nanosheet hollow spheres with enhanced supercapacitive performance , 2011 .

[38]  E. Bekyarova,et al.  High Energy Density Supercapacitor Based on a Hybrid Carbon Nanotube–Reduced Graphite Oxide Architecture , 2012 .

[39]  R. Ruoff,et al.  Graphene-based ultracapacitors. , 2008, Nano letters.

[40]  Y. Chabal,et al.  Unusual infrared-absorption mechanism in thermally reduced graphene oxide. , 2010, Nature materials.