In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2016-02, No. 1 ( 2016-09-01), p. 117-117
Abstract:
The sodium nickel chloride (Na/NiCl 2 ) battery is one of the most promising candidates for a large scale electrochemical energy storage device. The battery comprises NiCl 2 and molten Na as positive and negative electrodes in its charged state, and uses a Na + ion conducting β"-Al 2 O 3 solid electrolyte (BASE) to separate the cathode and anode. In order to facilitate fast sodium ion transport in the cathode compartment, molten NaAlCl 4 , as a secondary electrolyte (or catholyte), is infiltrated into the powdered cathode material. The battery typically operates at 250~300°C to maximize the ionic flux in the NaAlCl 4 and through the solid electrolyte, and to minimize the dissolution of NiCl 2 into the melt. However, this efficient battery has yet to be widely used in grid scale energy storage applications, since it is still expensive; it is difficult to dramatically reduce the cell price in its present form mainly due to its use of expensive sealing technologies. The presentation introduces U.S.-Korea collaborative efforts to develop a sodium beta-alumina battery with a Na/NiCl 2 chemistry that operates at a lower temperature. Since the novel battery runs below 200°C, it can be fabricated at an ultralow manufacturing cost by (1) introducing a new planar cell design with a greatly reduced number of cell components, and (2) eliminating expensive sealing technologies. Enhanced degradation resistance of cathode materials is another important advantage of this technology. This presentation will start by stating problems found in traditional sodium beta-alumina batteries, and our strategies to resolve the issues will be described. Technical challenges and progress in materializing prototype LT-NBB cells and related core technologies will be briefly discussed, which include cell design, a highly toughened BASE, an enhanced wetting agent, and an inexpensive sealing method.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2016-02/1/117
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2016
detail.hit.zdb_id:
2438749-6
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