期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 6, 页码 1553-1556出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201607820
关键词
conducting polymers; lithium ion batteries; organic active materials; polyaniline; spectroelectrochemistry
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 (230mAhg(-1)) that enables preparation of relatively thick composite electrodes with a low amount of carbon additives and high energy density (460Whkg(-1)). Concomitantly, at 1C rate, 400 cycles were achieved without significant capacity loss, while the coulombic efficiency is greater than 99%.
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