An advanced Na-NiCl2 battery using bi-layer (dense/micro-porous) β"-alumina solid-state electrolytes
- Research Institute of Industrial Science & Technology, Pohang (South Korea). Materials Research Division
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Electrochemical Materials & Systems Group, Energy Processes & Materials Division
Sodium metal halide (Na-MH) batteries present tremendous opportunities for grid scale energy storage applications. In this paper, we describe an advanced Na-MH battery operating at 190 °C using a bi-layer (thin dense/thick porous layers) β"-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 W h/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 literature. Finally, results from this work clearly demonstrate that advanced Na-MH batteries using bi-layer BASEs can have significant impacts on improving battery performances at lower operating temperatures, and further stretch its feasibility in stationary energy storage applications.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Electricity (OE)
- Grant/Contract Number:
- AC05-76RL01830; 70247; 20158510050010
- OSTI ID:
- 1457753
- Alternate ID(s):
- OSTI ID: 1544912
- Report Number(s):
- PNNL-SA-132030; PII: S0378775318306359
- Journal Information:
- Journal of Power Sources, Vol. 396, Issue C; ISSN 0378-7753
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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