Core Viewpoint - The article discusses the advancements in alkaline electrolysis membrane technology, particularly focusing on the Spongi series composite membranes developed by Tongwei New Energy, which aim to enhance hydrogen production efficiency and safety in the green hydrogen industry [2][4][6]. Group 1: Event Overview - The 2025 TrendBank Green Hydrogen Industry Conference was held on August 27-28 in Wuxi, focusing on reliable and efficient hydrogen production solutions [2]. - Zheng Xinle, Deputy General Manager of Shenzhen Tongwei New Energy Technology Co., Ltd., presented a report on the industrial application of alkaline electrolysis composite membranes [2][4]. Group 2: Technology Insights - Electrolysis of water is crucial for addressing renewable energy consumption and green hydrogen supply, with membranes being a key component that affects efficiency, purity, and stability [4]. - Membranes are categorized into three generations: traditional asbestos membranes, PPS membranes, and composite membranes. The first generation is banned due to toxicity, while the second generation faces challenges in gas permeability and hydrophilicity [4]. - The third generation composite membranes address the limitations of PPS membranes, offering high gas permeability and low surface resistance, although they are currently more expensive in China [4]. Group 3: Product Development - Tongwei New Energy has developed the Spongi series composite membranes, focusing on safety and durability, and has successfully created high-performance, long-life alkaline electrolysis membranes [4][6]. - The Spongi series membranes have undergone testing and are currently being trialed by major alkaline electrolysis companies in China, with performance feedback indicating they meet top-tier standards [6]. Group 4: Company Achievements - Tongwei New Energy, established in 2020, has made significant breakthroughs in membrane materials for hydrogen energy, including alkaline electrolysis membranes and other technologies [6]. - The company has achieved mass production of 2m wide ALK composite membranes and holds international patents for its core technologies [6]. - At the conference, Tongwei New Energy was awarded the "2025 Green Hydrogen Potential Rising Star Award" for its contributions to the industry [7].

Core Viewpoint - The article discusses the advancements and challenges in the development of alkaline water electrolysis membranes, particularly focusing on the transition from second-generation PPS membranes to third-generation composite membranes, which offer significant advantages in performance and stability [3][18]. Summary by Sections Alkaline Water Electrolysis Membranes - Membranes are critical components in alkaline water electrolysis, directly affecting electrolysis efficiency, gas purity, and system safety [3]. - The second-generation PPS membrane remains the mainstream application, while third-generation composite membranes are emerging with benefits such as low resistance, high hydrophilicity, gas tightness, safety, and enhanced mechanical strength [3][4]. Challenges in Composite Membrane Development - The development of composite membranes faces dual bottlenecks in materials and processes, with issues in adaptability and reliability being prominent [3][18]. - Cost and scalability challenges, along with a lack of standard certifications, hinder the growth of composite membranes [3][18]. Key Companies and Innovations - **Liyuan Technology**: A listed company focusing on fuel cell components, has made breakthroughs in third-generation PPS composite membranes and will unveil new products at the 2025 TrendBank Green Hydrogen Industry Conference [5][6]. - **Tongwei New Energy**: Specializes in core membrane materials for hydrogen energy storage, achieving large-scale shipments of composite membranes with excellent electrochemical performance [6][7]. - **Carbon Energy Technology**: Launched the first industrial-scale production line for composite membranes in China and has secured significant funding for expanding production capabilities [8][9]. - **Kewok Technology**: Focuses on high-end membrane materials, producing a series of composite membranes with enhanced performance metrics [13]. - **Huashangxia Geng Hydrogen Energy**: Recently established a production line for large-scale composite membranes, enhancing production capabilities for high-performance electrolysis [14][15]. - **Yuantai Energy Materials**: Aims to provide lifecycle products based on hydrogen membrane and electrode materials, with significant production capacity for composite membranes [16]. - **Zhongke Hydrogen Easy**: Established in 2022, has developed a range of composite membranes and electrodes, collaborating with various well-known electrolyzer companies [17]. Upcoming Events - The 2025 TrendBank Green Hydrogen Industry Conference will be held on August 27-28, 2025, in Wuxi, Jiangsu, focusing on solutions and development plans from domestic composite membrane companies [18].