Flexible supercapacitor-like actuator with carbide-derived carbon electrodes

Soft and flexible electric driven transducers based on carbide-derived carbon (CDC), 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4), polyvinylidenefluoride-co-hexafluoropropylene (PVdF(HFP)) are proposed, and electroactive performances of these materials are reported. By its nature, the synthesized device has two features when voltage is applied. Firstly, it is a bending-type electrochemical actuator. Besides the external change of shape, this device is also an electrochemical capacitor, providing opportunity to store a considerable amount of charge. Laminated actuators can work in open air at low voltages (1–3 V). Their operating frequency is between 5 × 10−3 – 1 × 101 Hz (it is from 5 millihertz to 200 hertz) and 10 Hz and the maximum strain calculated from transducer displacement is 0.6%. The gravimetric capacitance of CDC in actuator electrodes was found to be 119 F g−1 at 1 mV s−1 sweep rate of the applied triangle voltage. The effects of synthesis temperature of CDC and associated changes in the porosity and surface area on the actuator displacement are discussed. The results of this study demonstrated a great potential of CDC as an active material for actuator electrodes, especially in these applications where the performance of the actuator has to be standardized and highly predictable.

[1]  Takeo Yamada,et al.  Extracting the Full Potential of Single‐Walled Carbon Nanotubes as Durable Supercapacitor Electrodes Operable at 4 V with High Power and Energy Density , 2010, Advanced materials.

[2]  F. Carpi,et al.  Biomedical applications of electroactive polymer actuators , 2009 .

[3]  A. Burke.  Ultracapacitors: why, how, and where is the technology , 2000 .

[4]  Kinji Asaka,et al.  Highly Conductive Sheets from Millimeter‐Long Single‐Walled Carbon Nanotubes and Ionic Liquids: Application to Fast‐Moving, Low‐Voltage Electromechanical Actuators Operable in Air , 2009 .

[5]  J. Singer,et al.  Titanium Carbide Derived Nanoporous Carbon for Energy-Related Applications , 2006 .

[6]  P. Taberna,et al.  Monolithic Carbide-Derived Carbon Films for Micro-Supercapacitors , 2010, Science.

[7]  Takuzo Aida,et al.  Molecular Ordering of Organic Molten Salts Triggered by Single-Walled Carbon Nanotubes , 2003, Science.

[8]  E. Teller,et al.  ADSORPTION OF GASES IN MULTIMOLECULAR LAYERS , 1938 .

[9]  B. Conway.  Electrochemical Supercapacitors: Scientific Fundamentals and Technological Applications , 1999 .

[10]  T. Ekström,et al.  Carbon with an onion-like structure obtained by chlorinating titanium carbide , 2000 .

[11]  T. Fukushima,et al.  Fully plastic actuator through layer-by-layer casting with ionic-liquid-based bucky gel. , 2005, Angewandte Chemie.

[12]  K. Oguro.  Bending of an Ion-Conducting polymer Film-Electrode Composite by an Electric Stimulus at Low Voltage , 1992 .

[13]  Urmas Johanson,et al.  Nanoporous Carbide-Derived Carbon Material-Based Linear Actuators , 2009, Materials.

[14]  K. Asaka,et al.  Actuator properties of the complexes composed by carbon nanotube and ionic liquid: The effects of additives , 2009 .

[15]  R. Gallay,et al.  A dilatometric study of the voltage limitation of carbonaceous electrodes in aprotic EDLC type electrolytes by charge-induced strain , 2006 .

[16]  Yoseph Bar-Cohen,et al.  Electroactive Polymer (EAP) Actuators as Artificial Muscles: Reality, Potential, and Challenges, Second Edition , 2004 .

[17]  Jaan Leis,et al.  The advanced carbide-derived carbon based supercapacitor , 2006 .

[18]  E. Lust,et al.  Synthesis and characterisation of nanoporous carbide-derived carbon by chlorination of vanadium carbide , 2007 .

[19]  Kinji Asaka,et al.  Electromechanical behavior of fully plastic actuators based on bucky gel containing various internal ionic liquids , 2009 .

[20]  E. Lust,et al.  Electrical double-layer characteristics of novel carbide-derived carbon materials , 2006 .

[21]  A. Rinzler,et al.  Carbon nanotube actuators , 1999, Science.

[22]  J. Leis,et al.  The effect of Mo2C derived carbon pore size on the electrical double-layer characteristics in propylene carbonate-based electrolyte , 2010 .

[23]  P. Taberna,et al.  Relation between the ion size and pore size for an electric double-layer capacitor. , 2008, Journal of the American Chemical Society.

[24]  Jingsong Huang,et al.  Theoretical model for nanoporous carbon supercapacitors. , 2008, Angewandte Chemie.