| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
In-situ Precipitation Processing of High-ionic Conductivity LATP/PEO Solid Electrolyte for Lithium-ion Batteries |
| Author(s) |
Guangyu Wang, John Kieffer |
| On-Site Speaker (Planned) |
Guangyu Wang |
| Abstract Scope |
A novel water based in-situ precipitation method is devised for the fabrication of polymer matrix composite solid electrolytes, achieving effective spatial dispersion of Li1.3Al 0.3Ti1.7(PO4)3 (LATP) nanoparticles up to particle loadings of 30 wt% (15 vol%). Amorphous LATP nanoparticles precipitate in seemingly random locations within the polyethylene oxide matrix. The maximum ionic conductivity occurs near 13 vol% particle loading, as predicted by our triphase model, both in composition and magnitude. This strongly supports the concept that in these materials the most highly conductive region is the interphase that develops between LATP particles and polymer. The highest 20℃ ionic conductivity of 3.8 × 10-4 S/cm, observed at 25 wt% LATP and EO/Li = 10, exceeds that of the polymer matrix by 2 orders of magnitude. This substantial improvement is the consequence of minimizing particle agglomeration and the expansion of interphase region to the entire bulk polymer. (NSF-DMR 1610742) |