公开(公告)号：US20200091536A1

公开(公告)日：2020-03-19

申请号：US16570290

申请日：2019-09-13

Applicant: UNIVERSITY OF SOUTH CAROLINA

Inventor： BRIAN C. BENICEWICZ ,  LAURA MURDOCK ,  LIHUI WANG ,  FEI HUANG ,  ANDREW PINGITORE

IPC: H01M8/1027 ,  H01M4/92 ,  H01M4/88 ,  H01M8/1032 ,  H01M8/1044 ,  H01M8/1048 ,  H01M8/1067 ,  H01M8/1081

Abstract: 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/cm2 or greater.

公开(公告)号：US20220367897A1

公开(公告)日：2022-11-17

申请号：US17686631

申请日：2022-03-04

Applicant: UNIVERSITY OF SOUTH CAROLINA

Inventor： BRIAN C. BENICEWICZ ,  LAURA MURDOCK ,  LIHUI WANG ,  FEI HUANG ,  ANDREW PINGITORE

IPC: H01M8/1027 ,  H01M4/92 ,  H01M4/88 ,  H01M8/1032 ,  H01M8/1048 ,  H01M8/1067 ,  H01M8/1081 ,  H01M8/1044

Abstract: 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/cm2 or greater.

公开(公告)号：US20200091539A1

公开(公告)日：2020-03-19

申请号：US16570253

申请日：2019-09-13

Applicant: UNIVERSITY OF SOUTH CAROLINA

Inventor： BRIAN C. BENICEWICZ ,  LAURA MURDOCK ,  LIHUI WANG ,  FEI HUANG ,  ANDREW PINGITORE

IPC: H01M8/18 ,  H01M8/1032 ,  H01M8/1027 ,  H01M8/1044 ,  H01M8/1067 ,  H01M8/1081

Abstract: 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 10−7 cm2/s or less. Redox flow batteries incorporating the membranes can operate at current densities of about 50 mA/cm2 or greater.