Fabrication of Bi2O3||AC asymmetric supercapacitor with redox additive aqueous electrolyte and its improved electrochemical performances

Abstract A new asymmetric supercapacitor (ASC) was fabricated using flower like α-Bi2O3as negative and bio-waste derived activated carbon (AC) as positive electrodes with Li2SO4as electrolyte. Here, the fabricated ASC was operated over the potential range of 0-1.6 V and evaluated by cyclic voltammetry (CV), galvano static charge-discharge (GCD), electrochemical impedance spectroscopy (EIS) and cycle life. Further to improve the performance of ASC, KI was used as electrolyte redox additive with pristine (Li2SO4) electrolyte due to their possible redox reactions of iodine ions. Remarkably, a nearly threefold improved specific capacitance and energy density of 99.5 F g −1 and 35.4 Wh kg −1 respectively was achieved by adding of KI into Li 2 SO 4 electrolyte, while it was only 29 F g −1 and 10.2 Wh kg −1 for pristine (Li2SO4) electrolyte used ASC at 1.5 mA cm −2 .

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

[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]  Yongyao Xia,et al.  A new concept hybrid electrochemical surpercapacitor: Carbon/LiMn2O4 aqueous system , 2005 .

[5]  Seok-Hyun Lee,et al.  Use of KCl Aqueous Electrolyte for 2 V Manganese Oxide/Activated Carbon Hybrid Capacitor , 2002 .

[6]  Sung-Hwan Han,et al.  Electrosynthesis of Bi2O3 thin films and their use in electrochemical supercapacitors , 2006 .

[7]  Y. Tong,et al.  Synthesis of hierarchical rippled Bi(2)O(3) nanobelts for supercapacitor applications. , 2010, Chemical communications.

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

[9]  G. Rao,et al.  Carbon coated nano-LiTi2(PO4)3 electrodes for non-aqueous hybrid supercapacitors. , 2012, Physical chemistry chemical physics : PCCP.

[10]  Lili Liu,et al.  Electrode materials for aqueous asymmetric supercapacitors , 2013 .

[11]  ZhengHua Deng,et al.  A high rate, high capacity and long life (LiMn2O4 + AC)/Li4Ti5O12 hybrid battery–supercapacitor , 2009 .

[12]  R. Ruoff,et al.  Activated graphene as a cathode material for Li-ion hybrid supercapacitors. , 2012, Physical chemistry chemical physics : PCCP.

[13]  D. Xiao,et al.  High specific capacitance of CuS nanotubes in redox active polysulfide electrolyte , 2013 .

[14]  G. Lota,et al.  The effect of lignosulfonates as electrolyte additives on the electrochemical performance of supercapacitors , 2011 .

[15]  G. Rao,et al.  Hybrid supercapacitor with nano-TiP2O7 as intercalation electrode , 2011 .

[16]  Haijun Yu,et al.  A simple and high-effective electrolyte mediated with p-phenylenediamine for supercapacitor , 2012 .

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

[18]  V. Aravindan,et al.  Microwave assisted green synthesis of MgO–carbon nanotube composites as electrode material for high power and energy density supercapacitors , 2013 .

[19]  K. Loh,et al.  Electrochemical Double-Layer Capacitance of MoS[sub 2] Nanowall Films , 2007 .

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

[21]  Yan Liu,et al.  Improvement of the capacitive performances for Co-Al layered double hydroxide by adding hexacyanoferrate into the electrolyte. , 2009, Physical chemistry chemical physics : PCCP.

[22]  S. Pitchumani,et al.  New symmetric and asymmetric supercapacitors based on high surface area porous nickel and activated carbon , 2006 .

[23]  R. Menéndez,et al.  Towards a further generation of high-energy carbon-based capacitors by using redox-active electrolytes. , 2011, Angewandte Chemie.

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

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

[26]  Feng Luan,et al.  High energy density asymmetric supercapacitors with a nickel oxide nanoflake cathode and a 3D reduced graphene oxide anode. , 2013, Nanoscale.

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

[28]  Grzegorz Lota,et al.  Striking capacitance of carbon/iodide interface , 2009 .

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

[30]  S. T. Senthilkumar,et al.  Redox additive/active electrolytes: a novel approach to enhance the performance of supercapacitors , 2013 .

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

[32]  Yongsheng Chen,et al.  A high-performance supercapacitor-battery hybrid energy storage device based on graphene-enhanced electrode materials with ultrahigh energy density , 2013 .

[33]  Qiang Wang,et al.  A Hybrid Supercapacitor Fabricated with a Carbon Nanotube Cathode and a TiO2–B Nanowire Anode , 2006 .

[34]  Hun‐Gi Jung,et al.  A high energy and power density hybrid supercapacitor based on an advanced carbon-coated Li4Ti5O12 electrode , 2013 .

[35]  I. Chung,et al.  An All-Solid-State Electrochemical Supercapacitor Based on Poly3-(4-fluorophenylthiophene) Composite Electrodes , 2002 .