Electrochemical characterization of new conducting polymer electrolytes

Arbizzani, Catia; Mastragostino, Marina; Meneghello, L.; Andrieu, X.; Vicédo, T.

doi:10.1016/0378-7753(93)87005-n

Cited by 9 publications

(1 citation statement)

References 2 publications

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“…Also, the samples are operated in a wide potential window indicating the electrochemical stability, which is necessary for optoelectronic applications. [ 81 ] The values of electrochemical bandgaps and the optical bandgaps are approximately equal and a decreasing trend was observed in both.…”

Section: Resultsmentioning

confidence: 98%

Hole transport and current–voltage characteristics of PEO/PVP/cobalt nitrate polymer blend electrolytes

Kamath¹,

Devendrappa

2022

Polymer Engineering & Sci

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Hole transport properties and Current-Voltage characteristics of the single-layer device in an inverted structure were investigated with spin-coated PEO/PVP/ Cobalt nitrate polyblend electrolyte film as an active layer. A strong correlation between morphology and ionic conductivity was confirmed through XRD, DSC-TGA, SEM and fluorescence spectroscopic techniques. The optical band gap values are in good agreement with the electrochemical band gap. Schottky diode measurements confirmed the formation of p-type semiconductors with PEO/PVP bulk films with cobalt nitrate as a dopant at room temperature. The I-V characteristics are strongly dependent on the salt concentration in the polymer blend. The parameters of diodes such as barrier height, saturation current, and charge carrier concentration were calculated from I-V characteristics. From C-V characteristics a charge carrier concentration in the range of 10 22 cm À3 was obtained for the highest concentration of cobalt nitrate salt in the PEO/PVP blend. A very low energy barrier for hole injection at the anode ΔE h = 0.28 eV was observed.

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Section: Resultsmentioning

confidence: 98%

Hole transport and current–voltage characteristics of PEO/PVP/cobalt nitrate polymer blend electrolytes

Kamath¹,

Devendrappa

2022

Polymer Engineering & Sci

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Graphite, Carbonaceous Materials and Organic Solids as Active Electrodes in Metal‐Free Batteries

Beck

1997

Advances in Electrochemical Sciences and Engineering

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Crosslinked Poly(tetrahydrofuran) as a Loosely Coordinating Polymer Electrolyte

Mackanic

Michaels

Lee

et al. 2018

Advanced Energy Materials

194

187

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Solid polymer electrolytes (SPEs) promise to improve the safety and performance of lithium ion batteries (LIBs). However, the low ionic conductivity and transference number of conventional poly(ethylene oxide) (PEO) based SPEs preclude their widespread implementation.Herein, we introduce crosslinked poly(tetrahydrofuran) (xPTHF) as a promising polymer matrix for This article is protected by copyright. All rights reserved. 2"beyond PEO" SPEs. The crosslinking procedure creates thermally stable, mechanically robust membranes for use in LIBs. Molecular Dynamics and Density Functional Theory (DFT) simulations accompanied by 7 Li NMR measurements show that the lower spatial concentration of oxygen atoms in the xPTHF backbone leads to loosened O-Li + coordination. This weakened interaction enhances ion transport; xPTHF has a high lithium transference number of 0.53 and higher lithium conductivity than a xPEO SPE of the same length at room temperature. We demonstrate that organic additives further weaken the O-Li + interaction, enabling room temperature ionic conductivity of 1.2*10 -4 S cm -1 with 18 wt.% DMF in xPTHF. In a solid state LIB application, neat xPTHF SPEs cycle with near theoretical capacity for 100 cycles at 70 ºC, with rate capability up to 1C. The plasticized xPTHF SPEs operate at room temperature while maintaining respectable rate capability and capacity. The novel PTHF system demonstrated here represents an exciting platform for future studies involving SPEs.

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Electrochemical characterization of new conducting polymer electrolytes

Cited by 9 publications

References 2 publications

Hole transport and current–voltage characteristics of PEO/PVP/cobalt nitrate polymer blend electrolytes

Hole transport and current–voltage characteristics of PEO/PVP/cobalt nitrate polymer blend electrolytes

Graphite, Carbonaceous Materials and Organic Solids as Active Electrodes in Metal‐Free Batteries

Crosslinked Poly(tetrahydrofuran) as a Loosely Coordinating Polymer Electrolyte

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