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Article Dans Une Revue Angewandte Chemie International Edition Année : 2017

Lithium n-Doped Polyaniline as a High-Performance Electroactive Material for Rechargeable Batteries

Eric Levillain
Olivier Alévêque
Bernard Lestriez
Joël Gaubicher

Résumé

The discovery of conducting lithium-doped polyaniline with reversible redox chemistry allows simultaneous unprecedented capacity and stability in a non-aqueous Li battery. This compound (lithium emeraldinate) was synthesized by lithium–proton exchange on the emeraldine base in an anhydrous lithium-based electrolyte. A combination of UV/Vis-NIR spectroelectrochemistry, XPS, FTIR, and EQCM characterization allowed a unified description of the chemical and electrochemical behavior, showing facile charge delocalization of the doped states and the reversibility of the redox processes in this form of polyaniline. From a practical point of view, lithium emeraldinate behaves as a high-capacity organic active material (230 mAh g−1) that enables preparation of relatively thick composite electrodes with a low amount of carbon additives and high energy density (460 Wh kg−1). Concomitantly, at 1C rate, 400 cycles were achieved without significant capacity loss, while the coulombic efficiency is greater than 99 %.

Domaines

Chimie
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Dates et versions

hal-01430368 , version 1 (09-01-2017)

Identifiants

Citer

Pablo Jimenez, Eric Levillain, Olivier Alévêque, Dominique Guyomard, Bernard Lestriez, et al.. Lithium n-Doped Polyaniline as a High-Performance Electroactive Material for Rechargeable Batteries. Angewandte Chemie International Edition, 2017, 56, pp.1-5. ⟨10.1002/anie.201607820⟩. ⟨hal-01430368⟩
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