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1. (WO2013116263) INTERMEDIATE TEMPERATURE SODIUM METAL-HALIDE ENERGY STORAGE DEVICES

Pub. No.:    WO/2013/116263    International Application No.:    PCT/US2013/023731
Publication Date: Fri Aug 09 01:59:59 CEST 2013 International Filing Date: Thu Jan 31 00:59:59 CET 2013
IPC: H01M 10/38
H01M 2/08
H01B 1/06
Applicants: BATTELLE MEMORIAL INSTITUTE
Inventors: KIM, Jin, Yong
LI, Guosheng
LU, Xiaochuan
SPRENKLE, Vincent, L.
LEMMON, John, P.
YANG, Zhenguo
COYLE, Christopher, A.
Title: INTERMEDIATE TEMPERATURE SODIUM METAL-HALIDE ENERGY STORAGE DEVICES
Abstract:
Sodium metal-halide energy storage devices utilizing a substituting salt in its secondary electrolyte can operate at temperatures lower than conventional ZEBRA batteries while maintaining desirable performance and lifetime characteristics. According to one example, a sodium metal-halide energy storage device operates at a temperature less than or equal to 200 °C and has a liquid secondary electrolyte having MxNa1-yAlCl4-yHy, wherein M is a metal cation of a substituting salt, H is an anion of the substituting salt, y is a mole fraction of substituted Na and CI, and x is a ratio of y over r, where r is the oxidation state of M. The melting temperature of the substituting salt is less than that of NaCl.