Conducting Polymer Paper-Based Cathodes for High-Areal-Capacity Lithium-Organic Batteries
2015 (English)In: Energy Technology, ISSN 2194-4288, Vol. 3, 563-9 p.Article in journal (Refereed) PublishedText
Conducting polymers have been considered for use as cathode materials in rechargeable lithium-ion batteries (LIBs) since 1981 but problems with poor cycling stability, rapid self-discharge, and low energy and power densities have so far limited their applicability. Herein it is shown that nanostructured freestanding conducting polymer composites [e.g., polypyrrole (PPy) and polyaniline (PANI)] can be used to circumvent these shortcomings. Freestanding and binder-free PPy and cellulose-based composites can straightforwardly be used as versatile organic cathode materials for LIBs. The composite, reinforced with chopped carbon filaments (CCFs), exhibited a large active mass loading of approximately 10 mg cm -2, an areal capacity of 1.0 mAh cm -2 (corresponding to 102 mAh g -1), and stable cycling. With an active mass loading of 4.4 mg cm -2, a capacity of 0.22 mAh cm -2 (corresponding to 58 mAh g -1) was found for current densities of 5 A g -1 yielding discharge times of approximately 40 seconds, and a capacity retention of 91 % over 100 cycles was obtained at 0.2 A g -1. The present method constitutes a straightforward approach for the manufacturing of high-performance freestanding electroactive conducting-polymer-based paper-like electrodes for use in inexpensive and sustainable, high-performance organic LIBs.
Place, publisher, year, edition, pages
2015. Vol. 3, 563-9 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-271365OAI: oai:DiVA.org:uu-271365DiVA: diva2:891803