High performance solid-state electric double layer capacitor from redox mediated gel polymer electrolyte and renewable tamarind fruit shell derived porous carbon.

The activated carbon was derived from tamarind fruit shell and utilized as electrodes in a solid state electrochemical double layer capacitor (SSEDLC). The fabricated SSEDLC with PVA (polyvinyl alcohol)/H2SO4 gel electrolyte delivered high specific capacitance and energy density of 412 F g(-1) and 9.166 W h kg(-1), respectively, at 1.56 A g(-1). Subsequently, Na2MoO4 (sodium molybdate) added PVA/H2SO4 gel electrolyte was also prepared and applied for SSEDLC, to improve the performance. Surprisingly, 57.2% of specific capacitance (648 F g(-1)) and of energy density (14.4 Wh kg(-1)) was increased while introducing Na2MoO4 as the redox mediator in PVA/H2SO4 gel electrolyte. This improved performance is owed to the redox reaction between Mo(VI)/Mo(V) and Mo(VI)/Mo(IV) redox couples in Na2MoO4/PVA/H2SO4 gel electrolyte. Similarly, the fabricated device shows the excellent capacitance retention of 93% for over 3000 cycles. The present work suggests that the Na2MoO4 added PVA/H2SO4 gel is a potential electrolyte to improve the performance instead of pristine PVA/H2SO4 gel electrolyte. Based on the overall performance, it is strongly believed that the combination of tamarind fruit shell derived activated carbon and Na2MoO4/PVA/H2SO4 gel electrolyte is more attractive in the near future for high performance SSEDLCs.

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

[2]  S. T. Senthilkumar,et al.  Preparation of activated carbon from sorghum pith and its structural and electrochemical properties , 2011 .

[3]  R. Menéndez,et al.  Mechanisms of Energy Storage in Carbon-Based Supercapacitors Modified with a Quinoid Redox-Active Electrolyte , 2011 .

[4]  D. Su,et al.  Nanostructured carbon and carbon nanocomposites for electrochemical energy storage applications. , 2010, ChemSusChem.

[5]  R. Latham,et al.  Conducting polymer‐based electrochemical redox supercapacitors using proton and lithium ion conducting polymer electrolytes , 1998 .

[6]  Haijun Yu,et al.  A reversible redox strategy for SWCNT-based supercapacitors using a high-performance electrolyte. , 2013, Chemphyschem : a European journal of chemical physics and physical chemistry.

[7]  A. Ramesh,et al.  Removal of copper and cadmium from the aqueous solutions by activated carbon derived from Ceiba pentandra hulls. , 2006, Journal of hazardous materials.

[8]  Jun Zhou,et al.  Flexible solid-state supercapacitors based on carbon nanoparticles/MnO2 nanorods hybrid structure. , 2012, ACS nano.

[9]  R. Menéndez,et al.  Redox-active electrolyte for carbon nanotube-based electric double layer capacitors , 2011 .

[10]  Haijun Yu,et al.  Redox-active alkaline electrolyte for carbon-based supercapacitor with pseudocapacitive performance and excellent cyclability , 2012 .

[11]  Hongliang Li,et al.  A high-performance asymmetric supercapacitor fabricated with graphene-based electrodes , 2011 .

[12]  Elzbieta Frackowiak,et al.  Supercapacitors based on carbon materials and ionic liquids , 2006 .

[13]  C. Zaror,et al.  Effect of Ozone Treatment on Surface Properties of Activated Carbon , 2002 .

[14]  V. Moutarlier,et al.  Molybdate/sulfuric acid anodising of 2024-aluminium alloy: influence of inhibitor concentration on film growth and on corrosion resistance , 2003 .

[15]  S. T. Senthilkumar,et al.  Improved performance of electric double layer capacitor using redox additive (VO2+/VO2+) aqueous electrolyte , 2013 .

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

[17]  G. P. Pandey,et al.  Solid-State Supercapacitors Based on Pulse Polymerized Poly(3,4-ethylenedioxythiophene) Electrodes and Ionic Liquid Gel Polymer Electrolyte , 2012 .

[18]  Yaqin Huang,et al.  Hierarchical porous carbon obtained from animal bone and evaluation in electric double-layer capacitors , 2011 .

[19]  D. Dhawale,et al.  Fabrication and textural characterization of nanoporous carbon electrodes embedded with CuO nanoparticles for supercapacitors , 2011, Science and technology of advanced materials.

[20]  M. El‐Kady,et al.  Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors , 2012, Science.

[21]  Hsisheng Teng,et al.  Influence of oxygen treatment on electric double-layer capacitance of activated carbon fabrics , 2002 .

[22]  Zhang Lan,et al.  Application of a novel redox-active electrolyte in MnO2-based supercapacitors , 2012, Science China Chemistry.

[23]  Teng Zhai,et al.  TiO2@C core–shell nanowires for high-performance and flexible solid-state supercapacitors , 2013 .

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

[25]  Xing Xie,et al.  High-performance nanostructured supercapacitors on a sponge. , 2011, Nano letters.

[26]  E. Lust,et al.  Characterisation of activated nanoporous carbon for supercapacitor electrode materials , 2007 .

[27]  B. Wei,et al.  Supercapacitors from Activated Carbon Derived from Banana Fibers , 2007 .

[28]  Srinivasan Sampath,et al.  Hydrogel-polymer electrolytes for electrochemical capacitors: an overview , 2009 .

[29]  Colin G. Cameron,et al.  A Polypyrrole/Phosphomolybdic Acid ∣ Poly ( 3 , 4-ethylenedioxythiophene ) /Phosphotungstic Acid Asymmetric Supercapacitor , 2010 .

[30]  D. Wright,et al.  A self-template synthesis of hierarchical porous carbon foams based on banana peel for supercapacitor electrodes , 2012 .

[31]  H. Y. Chen,et al.  Catalytic oxidation of methanol on molybdate-modified platinum electrode in sulfuric acid solution , 2002 .

[32]  W. Sugimoto,et al.  Proton and electron conductivity in hydrous ruthenium oxides evaluated by electrochemical impedance spectroscopy: the origin of large capacitance. , 2005, The journal of physical chemistry. B.

[33]  Jumras Limtrakul,et al.  High-performance supercapacitor of manganese oxide/reduced graphene oxide nanocomposite coated on flexible carbon fiber paper , 2013 .

[34]  G. Chen,et al.  Individual and Bipolarly Stacked Asymmetrical Aqueous Supercapacitors of CNTs / SnO2 and CNTs / MnO2 Nanocomposites , 2009 .

[35]  S. T. Senthilkumar,et al.  Redox additive aqueous polymer gel electrolyte for an electric double layer capacitor , 2012 .

[36]  Wen‐Cui Li,et al.  Coconut-Shell-Based Porous Carbons with a Tunable Micro/Mesopore Ratio for High-Performance Supercapacitors , 2012 .

[37]  Xiaodong Chen,et al.  Highly Stretchable, Integrated Supercapacitors Based on Single‐Walled Carbon Nanotube Films with Continuous Reticulate Architecture , 2013, Advanced materials.

[38]  P. Taberna,et al.  Electrochemical Characteristics and Impedance Spectroscopy Studies of Carbon-Carbon Supercapacitors , 2003 .

[39]  Junwei Lang,et al.  Promising porous carbon derived from celtuce leaves with outstanding supercapacitance and CO₂ capture performance. , 2012, ACS applied materials & interfaces.

[40]  R. Socha,et al.  XPS and NMR studies of phosphoric acid activated carbons , 2008 .

[41]  S. T. Senthilkumar,et al.  Electric double layer capacitor and its improved specific capacitance using redox additive electrolyte , 2013 .

[42]  J. Tu,et al.  Graphene sheet/porous NiO hybrid film for supercapacitor applications. , 2011, Chemistry.

[43]  W. Shim,et al.  Highly porous electrodes from novel corn grains-based activated carbons for electrical double layer capacitors , 2008 .

[44]  V. Sivasankar,et al.  Tamarind (Tamarindus indica) fruit shell carbon: A calcium-rich promising adsorbent for fluoride removal from groundwater. , 2012, Journal of hazardous materials.

[45]  J. Tascón,et al.  Synthetic carbons activated with phosphoric acid III. Carbons prepared in air , 2003 .

[46]  F. Carrasco-Marín,et al.  Changes in surface chemistry of activated carbons by wet oxidation , 2000 .

[47]  R. Kannan,et al.  Design of an “all solid-state” supercapacitor based on phosphoric acid doped polybenzimidazole (PBI) electrolyte , 2009 .