Premium
High Energy Li‐Ion Electrodes Prepared via a Solventless Melt Process
Author(s) -
Astafyeva Ksenia,
Dousset Capucine,
Bureau Yannick,
Stalmach SaraLyne,
Dufour Bruno
Publication year - 2020
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.201900187
Subject(s) - materials science , electrode , anode , graphite , cathode , electrochemistry , porosity , composite material , chemical engineering , ion , nanotechnology , organic chemistry , chemistry , engineering
Abstract High areal density and high energy Li‐ion electrodes were prepared using a high throughput green, solventless and inexpensive melt process leading to electrodes of controlled porosity. Melt formulations were developed for NCA cathodes and graphite anodes. The formulations were based on commercially available and inexpensive elastomeric or thermoplastic binders, conventional conducting fillers and >90 wt% electrode active materials. A large range of loadings could be achieved, from 4 to 40 mg cm −2 single side. Electrochemical performances in half cells (coin cells) are reported. High capacity and cyclability for high loadings of NCA cathodes and graphite anodes were demonstrated. Areal capacities over 5 mAh.cm −2 in coin cells were obtained at a C/5 rate. Cycling at high rates, up to 5 C was demonstrated.