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公开(公告)号：US11482721B2
公开(公告)日：2022-10-25
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: H01M8/1081 , H01M8/1086 , H01M8/18 , H01M8/1032 , H01M8/1044 , H01M8/1067 , H01M8/1027
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.
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公开(公告)号：US11799112B2
公开(公告)日：2023-10-24
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 , H01M4/86
CPC classification number: H01M8/1027 , H01M4/8828 , H01M4/92 , H01M8/1032 , H01M8/1044 , H01M8/1048 , H01M8/1067 , H01M8/1081 , H01M4/8605
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.
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公开(公告)号：US11302948B2
公开(公告)日：2022-04-12
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 , H01M8/1048 , H01M8/1067 , H01M8/1081 , H01M8/1044 , H01M4/86
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.
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公开(公告)号：US20210280883A1
公开(公告)日：2021-09-09
申请号：US17194417
申请日：2021-03-08
Applicant: University of South Carolina
Inventor： Laura A. Murdock , Fei Huang , Brian C. Benicewicz
IPC: H01M8/103 , H01M8/1004 , C25B13/08 , C08J5/18 , C08K3/32
Abstract: The current disclosure teaches one to achieve PBI membranes with high ionic conductivity and low mechanical creep for the first time. This is in contrast to previous teachings of PBI membrane fabrication methods, which yield PBIs with either high ionic conductivity and high mechanical creep or low ionic conductivity and low mechanical creep. The membranes produced according to the disclosed process provide doped membranes for applications in fuel cells and electrolysis devices such as electrochemical separation devices.
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Patent Agency Ranking
公开(公告)号：US11884787B2
公开(公告)日：2024-01-30
申请号：US17522160
申请日：2021-11-09
Applicant: UNIVERSITY OF SOUTH CAROLINA
Inventor： Laura A. Murdock , Lihui Wang , Fei Huang , Brian C. Benicewicz
CPC classification number: C08J5/2256 , B01D67/0011 , B01D67/0013 , B01D67/0093 , B01D2323/30 , B01D2323/40 , B01D2325/02 , B01D2325/42 , C08J2379/04
Abstract: A novel process for making PBI films starting from gel PBI membranes polymerized and casted in the PPA process wherein acid-imbibed gel PBIs are neutralized in a series of water baths and undergo controlled drying in association with a substrate material, yielding a PBI film without the use of organic solvents.
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公开(公告)号：US11180621B2
公开(公告)日：2021-11-23
申请号：US16569983
申请日：2019-09-13
Applicant: University of South Carolina
Inventor： Laura A. Murdock , Fei Huang , Lihui Wang , Brian C. Benicewicz
Abstract: A novel process for making PBI films starting from gel PBI membranes polymerized and casted in the PPA process wherein acid-imbibed gel PBIs are neutralized in a series of water baths and undergo controlled drying in association with a substrate material, yielding a PBI film without the use of organic solvents.
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公开(公告)号：US11777124B2
公开(公告)日：2023-10-03
申请号：US17194417
申请日：2021-03-08
Applicant: University of South Carolina
Inventor： Laura A. Murdock , Fei Huang , Brian C. Benicewicz
CPC classification number: H01M8/103 , C08J5/18 , C08K3/32 , C25B13/08 , H01M8/1004 , C08J2379/04 , C08K2003/329 , H01M2008/1095 , H01M2300/0082
Abstract: The current disclosure teaches one to achieve PBI membranes with high ionic conductivity and low mechanical creep for the first time. This is in contrast to previous teachings of PBI membrane fabrication methods, which yield PBIs with either high ionic conductivity and high mechanical creep or low ionic conductivity and low mechanical creep. The membranes produced according to the disclosed process provide doped membranes for applications in fuel cells and electrolysis devices such as electrochemical separation devices.
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公开(公告)号：US12227627B2
公开(公告)日：2025-02-18
申请号：US18535450
申请日：2023-12-11
Applicant: UNIVERSITY OF SOUTH CAROLINA
Inventor： Laura A. Murdock , Lihui Wang , Fei Huang , Brian C. Benicewicz
Abstract: Novel PBI films which may be used in electrochemical cells, such as redox flow batteries, are disclosed. Additionally, disclosed herein are membranes which comprise the novel PBI films which may be free from an organic solvent, and have a tensile strength at break of at least 25 MPa after drying.
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公开(公告)号：US20200087473A1
公开(公告)日：2020-03-19
申请号：US16569983
申请日：2019-09-13
Applicant: University of South Carolina
Inventor： Laura A. Murdock , Fei Huang , Lihui Wang , Brian C. Benicewicz
Abstract: A novel process for making PBI films starting from gel PBI membranes polymerized and casted in the PPA process wherein acid-imbibed gel PBIs are neutralized in a series of water baths and undergo controlled drying in association with a substrate material, yielding a PBI film without the use of organic solvents.
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