Apexazole® PBI High-Temperature Fuel Cell Proton Exchange Membrane

Apexazole® PBI (polybenzimidazole) high‑temperature proton exchange membrane for fuel cells is specifically designed for high‑temperature proton exchange membrane fuel cells (HT‑PEMFCs), enabling stable operation at 120–200°C without humidification. Based on a PBI polymer matrix, this product incorporates phosphoric acid doping to create highly efficient proton conduction pathways. Compared with conventional perfluorosulfonic acid membranes (Nafion), it delivers superior high‑temperature proton conductivity without requiring a complex water management system, thereby significantly simplifying the fuel cell stack architecture and reducing both cost and complexity. Its key advantages include: proton conductivity of 108–115 mS/cm at 160–180°C, resulting in excellent power density; enhanced catalyst tolerance to carbon monoxide at elevated temperatures, allowing operation in environments with up to 3% CO; elimination of humidification systems and streamlined water management, leading to a more compact stack design and over 30% improvement in reliability; as well as outstanding chemical stability, mechanical strength, and phosphoric acid retention, ensuring long service life. Polybenzimidazole (PBI) high‑temperature proton exchange membranes are widely used in automotive fuel cells, methanol reforming‑based cogeneration, distributed energy systems, aerospace backup power supplies, and industrial waste‑heat recovery applications. The product strictly complies with the GB/T 20042.3‑2022 national standard and undergoes rigorous quality control to ensure consistent, reliable performance across all batches. Zhongke Jinding is committed to becoming a world‑leading supplier of PBI membrane materials, providing customers with customized membrane solutions.

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Product Details

Apexazole® PBI (Polybenzimidazole) High-temperature proton exchange membranes for fuel cells are specifically designed for high-temperature proton exchange membrane fuel cells (HT‑PEMFCs), enabling stable operation at 120–200°C without humidification. Based on a PBI polymer matrix, these membranes incorporate phosphoric acid doping to create highly efficient proton-conducting pathways. Compared with conventional perfluorosulfonic acid membranes (Nafion), they deliver superior high‑temperature proton conductivity without requiring complex water‑management systems, thereby significantly simplifying the fuel cell stack architecture and reducing both cost and complexity. Key advantages include: proton conductivities of 108–115 mS/cm at 160–180°C, coupled with excellent power density; enhanced catalyst tolerance to carbon monoxide at elevated temperatures, allowing operation in environments with up to 3% CO; a compact stack design enabled by the elimination of humidification and streamlined water management, resulting in more than a 30% improvement in reliability; and outstanding chemical stability, mechanical strength, and phosphoric acid retention, ensuring long service life. Polybenzimidazole (PBI) high‑temperature proton exchange membranes are widely employed in automotive fuel cells, methanol reforming‑based cogeneration, distributed energy systems, aerospace backup power supplies, and industrial waste‑heat recovery applications. The products comply rigorously with the GB/T 20042.3‑2022 national standard and undergo comprehensive quality‑control procedures to ensure consistent, reliable performance across all batches. Zhongke Jinding is committed to becoming a world‑leading supplier of PBI membrane materials, offering customers tailored membrane solutions.

Product Specifications

Performance Metrics	Unit	Parameter value	Test conditions	Note
Thickness	micrometer	30	Standard environment	Customizable
Tensile strength (dry state)	MPa	≥145	Stretching speed: 10 mm/min	GB/T 20042.3-2022
Tensile strength (after acid addition)	MPa	≥12	Stretching speed: 10 mm/min	After phosphoric acid doping
Elongation at break (dry state)	%	≥35	Stretching speed: 10 mm/min	GB/T 20042.3-2022
Elongation at break (after acid addition)	%	≥200	Stretching speed: 10 mm/min	After phosphoric acid doping
Phosphate adsorption capacity	wt.%	410-440	Phosphoric acid soaking method	Enterprise Standard
Proton conductivity (160°C, RH=0%)	mS/cm	108-115	160°C, RH=0%	GB/T 20042.3-2022
Hydrogen permeation current density	mA/cm²	1.2-1.8	80°C, 100% RH	Enterprise standard, 80°C/100%RH