- COLUMBIA SC, US LAURA MURDOCK - COLUMBIA SC, US LIHUI WANG - WEST COLUMBIA SC, US FEI HUANG - WEST COLUMBIA SC, US ANDREW PINGITORE - COLUMBIA SC, US
Disclosed are redox flow battery membranes, redox flow batteries incorporating the membranes, and methods of forming the membranes. The membranes include a 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. The membranes are imbibed with a redox flow battery supporting electrolyte such as sulfuric acid and can operate at very high ionic conductivities of about 100 mS/cm or greater. Redox flow batteries incorporating the PBI-based membranes can operate at high current densities of about 100 mA/cmor greater.
Polybenzimidazole (Pbi) Membranes For Redox Flow Batteries
- COLUMBIA SC, US LAURA MURDOCK - COLUMBIA SC, US LIHUI WANG - WEST COLUMBIA SC, US FEI HUANG - WEST COLUMBIA SC, US ANDREW PINGITORE - COLUMBIA SC, US
Disclosed are redox flow battery membranes, redox flow batteries incorporating the membranes, and methods of forming the membranes. The membranes include a 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. The membranes are imbibed with a redox flow battery supporting electrolyte such as sulfuric acid and can operate at very high ionic conductivities of about 100 mS/cm or greater. Redox flow batteries incorporating the PBI-based membranes can operate at high current densities of about 100 mA/cmor greater.
Low Permeability Polybenzimidazole (Pbi) Gel Membranes For Redox Flow Batteries
- COLUMBIA SC, US LAURA MURDOCK - COLUMBIA SC, US LIHUI WANG - WEST COLUMBIA SC, US FEI HUANG - WEST COLUMBIA SC, US ANDREW PINGITORE - COLUMBIA SC, US
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.