Aluminum electrolytic capacitors, as key energy storage components in power electronics systems, continuously drive performance breakthroughs through material innovation and process upgrades. The current mainstream product material system composition and technological progress are as follows:

1. Anode aluminum foil: Precise control of dielectric layer. 6N-grade (99.9999%) ultra-high purity aluminum foil is used, and a three-dimensional honeycomb-like pore structure (porosity increased to 80%+) is formed through a stepwise electrochemical etching process. The thickness of the resulting γ-type Al₂O₃ dielectric layer can be precisely controlled to 5-200nm (corresponding to a voltage resistance of 6-630V). In 2024, the industry introduced an atomic layer deposition (ALD) auxiliary process, which reduced the uniformity error of the dielectric layer from ±15% to ±5%, significantly improving the reliability of high-voltage capacitors.

2. Electrolyte system: Accelerated solid-state transformation. The traditional liquid system is based on quaternary ammonium salt-γ-butyrolactone, and achieves a lifespan of 85°C/5000 hours by adding corrosion inhibitors such as nitrobenzimidazole. In 2025, the market share of polypyrrole (PPy)/PEDOT conductive polymer solid-state electrolyte has reached 32% (according to TechInsights data), with its ionic conductivity exceeding 10S/cm, supporting extreme operating conditions from -55°C to 150°C, and ESR reduced by 60% compared to the liquid system.

3. Cathode aluminum foil: Surface engineering innovation. The use of light-annealed aluminum foil (with a surface roughness of ≤0.2μm) and plasma activation treatment to generate a hydroxylated surface reduces the electrolyte wetting angle from 75° to 15°, and the equivalent area of the cathode is expanded by 3 times. Japanese manufacturers have achieved aluminum nitride (AlN) ceramic-coated cathodes that can maintain ESR stability in an environment at 200°C.

4. Packaging structure: The intelligent protection upgrade composite rubber plug (EPDM+fluoroelastomer) achieves IP67 dust and water resistance, and the heat dissipation coefficient of the laser-welded aluminum shell is increased to 15W/m·K. The pressure-temperature dual-control safety valve, which will be standard in 2025, integrates a MEMS sensor, enabling a 30ms early trigger for pressure relief, reducing the accident rate by 90% compared to traditional mechanical valves.

Application scenario expansion: In fields such as the 800V platform for new energy vehicles (paired with silicon carbide inverters) and GaN radio frequency power supplies for 5G base stations, aluminum electrolytic capacitors have achieved a 40% reduction in volume and a power density increase to 2.5mF/cm³ through material iteration. The global market size is expected to reach $8.2 billion by 2025 (CAGR 6.8%).

About Us

Guangdong Fulong Electronic Technology Co., Ltd. is a private high-tech enterprise specializing in the research, development, manufacturing, and sales of aluminum electrolytic capacitors, which has obtained certifications of IATF16949, ISO9001, ISO14001, and ISO45001. The company covers an area of 17,000 square meters and boasts over 50 automated production lines. With a total investment of 50 million yuan (RMB), it employs more than 100 staff members, including over 20 professionals in engineering technology, quality management, and production management. The annual production capacity of capacitors (4*5.4~16*21.5) stands at approximately 400 million units. The products are primarily sold to domestic and foreign markets, with a commitment to expanding the company's reach globally.

Jiangxi Fulong Electronic Technology Co., Ltd. is a wholly-owned subsidiary of Guangdong Fulong Electronic Technology Co., Ltd. established in Hukou County, Jiangxi Province, with a total investment of RMB 500 million. It boasts 50 fully automated production lines, with an annual production capacity of approximately 1.2 billion capacitors (4*5.4~16*21.5).

Fulong Group boasts an internationally professional core technology R&D team for aluminum electrolytic capacitors and a global sales network. With extensive experience in the design, research, and production management of aluminum electrolytic capacitors, the R&D team adheres to the technical design theory of aluminum electrolytic capacitors, complies with international and domestic legal and regulatory requirements (RoHs), and follows the highest international quality standards

Fulong Group boasts a team of highly qualified professional technical and management personnel, capable of producing a range of chip aluminum electrolytic products according to customer requirements. These products encompass novel chip-specific specifications such as high frequency and low impedance, low leakage, wide temperature range, extremely low impedance, non-polarity, ultra-long lifespan, medium and high voltage longevity, and high reliability. Additionally, our products can withstand a soldering temperature of 260°C, meeting the lead-free reflow soldering technology required by original equipment manufacturers (OEMs) for surface mount technology (SMT). All technical indicators of our products meet or exceed the standards of similar international products.

While strengthening management and expanding operational scale, Fulon Group is also committed to enhancing corporate competitiveness and customer satisfaction, continuously and steadily increasing trust among customers and society, and further optimizing environmental management and expanding social contributions. It aims to develop together with the electronics industry while continuously meeting market demands.

Guangdong Fulong Electronic Technology Co., Ltd

Guangdong Follon Electronic Technology Co., Ltd.

Jiangxi Fulong Electronic Technology Co., Ltd

Jiangxi Follon Electronic Technology Co., Ltd.

Address: Building 3, South Area, Haishan Science and Technology Park, Hukou County, Jiujiang City, Jiangxi Province

www.follon.com

Professional manufacturer of high-quality chip electrolytic capacitors