{
  "$type": "site.standard.document",
  "description": "Disclosed are redox flow battery membranes, redox flow batteries incorporating the membranes, and methods of forming the membranes. The membranes include a densified polybenzimidazole gel membrane that is capable of incorporating a high liquid content without loss of structure that is formed…",
  "path": "/patents/1257564",
  "publishedAt": "2020-03-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M8/188",
    "UNIVERSITY OF SOUTH CAROLINA"
  ],
  "textContent": "Disclosed are redox flow battery membranes, redox flow batteries incorporating the membranes, and methods of forming the membranes. The membranes include a densified polybenzimidazole gel membrane that is capable of incorporating a high liquid content without loss of structure that is formed according to a process that includes in situ hydrolysis of a polyphosphoric acid solvent followed by densification of the gel membrane. The densified membranes are then imbibed with a redox flow battery supporting electrolyte such as sulfuric acid and can operate at very high ionic conductivities of about 50 mS/cm or greater and with low permeability of redox couple ions, e.g. vanadium ions, of about 10cm/s or less. Redox flow batteries incorporating the membranes can operate at current densities of about 50 mA/cmor greater.",
  "title": "Low Permeability Polybenzimidazole (PBI) Gel Membranes for Redox Flow Batteries"
}