Iron-sulfide redox flow batteries

Title: Iron-sulfide redox flow batteries

Iron-sulfide redox flow battery (RFB) systems can be advantageous for energy storage, particularly when the electrolytes have pH values greater than 6. Such systems can exhibit excellent energy conversion efficiency and stability and can utilize low-cost materials that are relatively safer and more environmentally friendly. One example of an iron-sulfide RFB is characterized by a positive electrolyte that comprises Fe(III) and/or Fe(II) in a positive electrolyte supporting solution, a negative electrolyte that comprises S.sup.2- and/or S in a negative electrolyte supporting solution, and a membrane, or a separator, that separates the positive electrolyte and electrode from the negative electrolyte and electrode.

Inventors:: Xia, Guanguang; Yang, Zhenguo; Li, Liyu; Kim, Soowhan; Liu, Jun; Graff, Gordon L

Issue Date:: 2016-06-14

OSTI Identifier:: 1257193

Assignee:: Battelle Memorial Institute (Richland, WA) PNNL

Patent Number(s):: 9,368,824

Application Number:: 14/079,135

Contract Number:: AC05-76RL01830

Resource Relation:: Patent File Date: 2013 Nov 13

Research Org:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; 30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE

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Other works cited in this record:

A comparative study of carbon felt and activated carbon based electrodes for sodium polysulfide/bromine redox flow battery
journal, September 2006

Zhou, Hantao; Zhang, Huamin; Zhao, Ping
Electrochimica Acta, Vol. 51, Issue 28, p. 6304-6312
DOI: 10.1016/j.electacta.2006.03.106

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