1,721,043 research outputs found
Erratum: Preparation and electrochemical characterization of a polymer Li1.03Mn1.97O4/pEDOT composite electrode (Electrochemistry Communications (2002) 4 (545) PII: S1388248102003685))
No full textErrata Corrig
Preparation and electrochemical characterization of a polymer Li1.03Mn1.97O4/pEDOT composite electrode
No full textThe development and characterization of a polymeric composite based on non-stoichiometric Li1.03Mn1.97O4 spinel operating at 4 V and poly(3,4-ethylenedioxy)thiophene (pEDOT) are reported. In this composite the pEDOT substitutes the carbon usually mixed with the inorganic oxide-based electrodes to improve their electronic conductivity; the pEDOT thus functions as an electronic conductor and is electroactive in the same potential range of LiMn2O4. Electrochemical data for pure pEDOT and for composites of pEDOT/carbon, conventional Li1.03Mn1.97O4/carbon and polymer Li1.03Mn1.97O4/pEDOT are reported and discussed. © 2002 Elsevier Science B.V. All rights reserved
Characterization by impedance spectroscopy of a polymer-based supercapacitor
No full textThe performance of a polymer redox supercapacitor based on poly(dithieno[3,4-b: 3′,4′-d] thiophene) in liquid and in polymer gel electrolyte was tested for capacity, energy density, power density and self-discharge. The results are very promising and demonstrate the viability of a symmetric supercapacitor based on an n-and p-doped electronically conducting polymer. © 1995
Electrochromic devices: A comparison of several systems
No full textThe great variety of colour contrast achieved with electronically conducting polymers is the most significant characteristic of this class of ion-insertion organic materials. The performance of selected electrochromic devices based on electronically conducting polymers, with organic or inorganic materials as optically passive or electrochromic in complementary mode counter-electrodes, is reported and the advantages and drawbacks of each system discussed. © 1995
Polymer-based redox supercapacitors: A comparative study
No full textThe increasing attention being given to supercapacitors is stimulated by the prospect of using such devices as secondary power sources in electric vehicle propulsion. The present study focuses on redox supercapacitors with electronically conducting polymers as electrode materials. Performance data of a symmetric supercapacitor based on p-doped poly(pyrrole), of an unsymmetric supercapacitor based on both p-doped poly(pyrrole) and poly(3-methylthiophene), and of a symmetric supercapacitor based on p-and n-doped poly(dithieno[3,4-b : 3′,4′-d]thiophene) are here compared
Polybithiophene as positive electrode in solid-state polyethylene oxide—LiClO4 lithium rechargeable battery
No full textCyclability features of an all solid-state lithium polybithiophene battery with PEO20LiClO4 polymer electrolyte was investigated at 70°C working temperature. Although the capacity values of the solid device are lower than those of the comparable one with liquid electrolyte, the cyclability performances are promising and the cycle life is satisfactory. The shelf-life of the solid battery was also investigated. The self-discharge rate is fast at 70°C but is not appreciable at room temperature. © 1990
Batteries
No full textThis chapter is not intended as an exhaustive treatment of batteries as such. Rather, it seeks to bring to the fore the wide-ranging importance of one application of electron transfer: batteries. Of no less importance in this connection is the enormous effort of interdisciplinary research needed to develop batteries responsive to scientific advances and technological innovations-research that is strengthened under
the pressure of market demand
Poly(3-methylthiophenes) for an all polymer electrochromic device
No full textAn important feature for electrochromic windows is an all-solid configuration and in this connection
we present the performance of the poly(3-methylthiophene)//poly(3,J-dimethyl,2,2'-bithiophene) electrochromic device with a polyacrylonitrile (PAN)-based gel electrolyte
Impedance spectroscopy in electrode/electrolyte interface investigations
No full textElectrochemical characteristics of two propylene carbonate-encapsulating polymer electrolytes based on a polyester of 3,3'-thiodipropionic acid and tri-ethylene glycol, and on a bis-amino poly(ethyleneoxide) PEO-poly(propyleneoxide) (PPO) copolymer, respectively, are compared to those of a polymer network based on PEO and a styrenic macromonomer of PEO, with particular emphasis on Li/polymer electrolyte interface stability. © 1994
An electrochromic window based on polymethyl thiophene and nickel oxide electrodes
No full textThe properties and characteristics of an optical switching based on polymethylthiophene as the primary electrochromic material and Li-intercalated nickel; oxide as the counter electrode, have been investigated in terms of electrical and optical response. The results indicate that the system is promising for the realization of new types of electrochromic windows. © 1991
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