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This content will become publicly available on October 18, 2018

Title: Effect of cathode thickness on the performance of planar Na-NiCl 2 battery

Na-beta alumina batteries (NBBs) are one of the most promising technologies for renewable energy storage and grid applications. Commercial NBBs are typically constructed in tubular designs, primarily because of their ease of sealing. But, planar designs are considered superior to tubular counterparts in terms of power output, cell packing, ease of assembly, and thermal management. In this paper, the performance of planar NBBs has been evaluated at an intermediate temperature. In particular, planar Na-NiCl 2 cells with different cathode loadings and thicknesses have been studied at 190 °C. We investigated the effects of the cathode thickness, charging current, and discharging power output on the cell capacity and resistance. More than 60% of theoretical cell capacity was retained with constant discharging power levels of 200, 175, and 100 mW/cm 2 for 1x, 2x, and 3x cathode loadings, respectively. The cell resistance with 1x and 2x cathode loadings was dominated by ohmic resistance with discharging currents up to 105 mA/cm 2, while for 3x cathode loading, it was primarily dominated by ohmic resistance with currents less than 66.67 mA/cm 2 and by polarization resistance above 66.67 mA/cm 2.
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Electrochemical Materials and Systems Group
  2. Research Inst. of Industrial Science and Technology, Pohang (South Korea). Materials Research Division
Publication Date:
Report Number(s):
Journal ID: ISSN 0378-7753; PII: S0378775317309114
Grant/Contract Number:
AC05-76RL01830; 57558; 20158510050010
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 365; Journal Issue: C; Journal ID: ISSN 0378-7753
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE Office of Electricity Delivery and Energy Reliability (OE)
Country of Publication:
United States
25 ENERGY STORAGE; Na-beta alumina batteries; Tubular and planar designs; Na-NiCl2 cell; Electrode thickness; Power output
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1395285