We describe an advanced Na-metal halide (Na-MH) battery operating at 190oC using a bi-layer (dense/porous layers) ?-alumina solid-state electrolyte (BASE). The novel design of the bi-layer BASE promotes high Na-ion transportation by reducing the Na ion path length. The excellent battery performances are achieved with a stable capacity retention of 350 Wh/kg up to >350 cycles (~ 6 months). Moreover, owing to the thin dense layer of BASE, the round trip energy efficiency (or discharging energy density) of the tested battery shows an ~8% increase compared to that of state of the art Na-MH battery reported in the literatures.
Revised: January 23, 2019 |
Published: August 31, 2018
Citation
Jung K., H. Chang, J.F. Bonnett, N.L. Canfield, V.L. Sprenkle, and G. Li. 2018.An advanced Na-NiCI2 battery using bi-layer (dense/micro-porous) ß"-alumina solid-state electrolytes.Journal of Power Sources 396.PNNL-SA-132030.doi:10.1016/j.jpowsour.2018.06.039