Activated carbon derived from melaleuca barks for outstanding high-rate supercapacitors

Activated carbon (AC) was prepared via carbonizing melaleuca bark in an argon atmosphere at 600 °C followed with KOH activation for high-rate supercapacitors. This AC electrode has a high capacitance of 233 F g(-1) at a scan rate of 2 mV s(-1) and an excellent rate capability of ∼80% when increasing the sweep rate from 2 to 500 mV s(-1). The symmetric supercapacitor assembled by the above electrode can deliver a high energy density of 4.2 Wh kg(-1) with a power density of 1500 W kg(-1) when operated in the voltage range of 0-1 V in 1 M H2SO4 aqueous electrolyte while maintaining great cycling stability (less than 5% capacitance loss after 10 000 cycles at sweep rate of 100 mV s(-1)). All the outstanding electrochemical performances make this AC electrode a promising candidate for potential energy storage application.

[1]  Zhong Lin Wang,et al.  A paper-based nanogenerator as a power source and active sensor , 2013 .

[2]  Y. Gogotsi,et al.  Freestanding functionalized carbon nanotube-based electrode for solid-state asymmetric supercapacitors , 2014 .

[3]  Xiulei Ji,et al.  Pyrolysis of cellulose under ammonia leads to nitrogen-doped nanoporous carbon generated through methane formation. , 2014, Nano letters.

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

[5]  D. Zhao,et al.  Carbon Materials for Chemical Capacitive Energy Storage , 2011, Advanced materials.

[6]  S. Maensiri,et al.  One-pot hydrothermal synthesis, characterization, and electrochemical properties of rGO/MnFe2O4 nanocomposites , 2015 .

[7]  J. A. Menéndez,et al.  The effect of the carbon surface chemistry and electrolyte pH on the energy storage of supercapacitors , 2014 .

[8]  N. Shimodaira,et al.  Raman spectroscopic investigations of activated carbon materials , 2002 .

[9]  Y. Gogotsi,et al.  Capacitive energy storage in nanostructured carbon-electrolyte systems. , 2013, Accounts of chemical research.

[10]  Gleb Yushin,et al.  Nanostructured activated carbons from natural precursors for electrical double layer capacitors , 2012 .

[11]  François Béguin,et al.  A High‐Performance Carbon for Supercapacitors Obtained by Carbonization of a Seaweed Biopolymer , 2006 .

[12]  Hidetaka Konno,et al.  Carbon materials for electrochemical capacitors , 2010 .

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

[14]  Satishchandra Ogale,et al.  From dead leaves to high energy density supercapacitors , 2013 .

[15]  Zhonghua Zhu,et al.  Nanoporous carbon electrode from waste coffee beans for high performance supercapacitors , 2008 .

[16]  Lili Zhang,et al.  Carbon-based materials as supercapacitor electrodes. , 2009, Chemical Society reviews.

[17]  E. Frąckowiak,et al.  Templated Mesoporous Carbons for Supercapacitor Application , 2005 .

[18]  Mykola Seredych,et al.  Surface functional groups of carbons and the effects of their chemical character, density and accessibility to ions on electrochemical performance , 2008 .

[19]  Jinhua Jiang,et al.  Hierarchical porous carbons with controlled micropores and mesopores for supercapacitor electrode materials , 2008 .

[20]  S. Ogale,et al.  From waste paper basket to solid state and Li-HEC ultracapacitor electrodes: a value added journey for shredded office paper. , 2014, Small.

[21]  S. Ogale,et al.  From graphite oxide to highly water dispersible functionalized graphene by single step plant extract-induced deoxygenation , 2011 .

[22]  Zheng Wang,et al.  Hydrothermal synthesis of macroscopic nitrogen-doped graphene hydrogels for ultrafast supercapacitor , 2013 .

[23]  Zheng Hu,et al.  Carbon Nanocages as Supercapacitor Electrode Materials , 2012, Advanced materials.

[24]  Y. Gogotsi,et al.  True Performance Metrics in Electrochemical Energy Storage , 2011, Science.

[25]  Feifei Liu,et al.  Mesoporous carbon nanofibers with large cage-like pores activated by tin dioxide and their use in supercapacitor and catalyst support , 2014 .

[26]  Lei Zhang,et al.  A review of electrode materials for electrochemical supercapacitors. , 2012, Chemical Society reviews.

[27]  Chunlei Wang,et al.  KOH-activated depleted fullerene soot for electrochemical double-layer capacitors , 2014, Journal of Applied Electrochemistry.

[28]  Sean C. Smith,et al.  Understanding the enhancement in photoelectrochemical properties of photocatalytically prepared TiO2-reduced graphene oxide composite , 2011 .

[29]  Karen Willcox,et al.  Kinetics and kinematics for translational motions in microgravity during parabolic flight. , 2009, Aviation, space, and environmental medicine.

[30]  M. Čadek,et al.  Tuning Carbon Materials for Supercapacitors by Direct Pyrolysis of Seaweeds , 2009 .

[31]  Arunabha Ghosh,et al.  Carbon-based electrochemical capacitors. , 2012, ChemSusChem.

[32]  K. Sing.  Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984) , 1985 .

[33]  Y. Gogotsi,et al.  Effects of structural disorder and surface chemistry on electric conductivity and capacitance of porous carbon electrodes. , 2014, Faraday discussions.

[34]  J. A. Menéndez,et al.  On the nature of basic sites on carbon surfaces: an overview , 2004 .

[35]  P. Taberna,et al.  Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer , 2006, Science.