Electrochemical cells with ionic sequestration provided by porous separators

Frischmann, Peter David; Helms, Brett Anthony; Alessandro, Jon-Michael

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DOE OSTI · 1924921

Electrochemical cells with ionic sequestration provided by porous separators

Frischmann, Peter David·Helms, Brett Anthony·Alessandro, Jon-Michael

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Abstract

Provided are electrochemical cells including separators permeable to some materials and impermeable to other materials in electrolytes. Also provide are methods of forming such separators. The selective permeability of a separator is achieved by its specific pore diameter and a narrow distribution of this diameter. Specifically, a species responsible for ion transport in an electrochemical cell are allowed to pass through the separator, while another species is blocked thereby preventing degradation of the cell. For example, a species containing lithium ions is allowed to pass in rechargeable cells, while one or more species containing transition metals are blocked. In some embodiments, a separator may include a membrane layer with at least 90% of pores of this having a diameter of between about 0.1 nanometers and 1.0 nanometer. The membrane layer may be a standalone layer or supported by a membrane support.

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BibTeX RIS

Frischmann, Peter David, Helms, Brett Anthony, Alessandro, Jon-Michael. 2022-07-19. Electrochemical cells with ionic sequestration provided by porous separators. https://www.osti.gov/biblio/1924921

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