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公司简介

Company Introduction

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Founded in 1985
Jiujiang Defu Technology Co., Ltd. is a national high-tech enterprise specializing in the research, development, production, and sales of electrolytic copper foil. With independent intellectual property rights and decades of expertise, Defu has become a trusted partner to leading companies such as CATL, LG Chem, and BYD.

Our products range from ultra-thin 4–10μm double sided polished copper foil for new energy vehicle batteries, to 12–210μm high-temperature, high ductility copper foil (HTE) and flexible copper foil (FCF) for electronic circuits. We are also advancing next-generation solutions such as ultra-low profile copper foil (HVLP) and reverse-treated copper foil (RTF) for 5G and other specialized applications.

Innovation is at the heart of our growth. Defu maintains a strong R&D capability, supported by a post-doctoral research station and a CNAS-certified testing center that can independently issue industry reports. This foundation allows us to continuously push the boundaries of copper foil technology, delivering products that meet the highest standards of performance, reliability, and safety.
德富新能源
Defu New Energy
Jiujiang Defu New Energy Co., Ltd., founded on Apr. 2, 2020, covers 57.3 mu (38,169 ㎡) and manufactures special electronic materials.
琥珀新材
Amber New Materials
Jiujiang Amber New Materials Co., Ltd., founded in May 2022, started construction in Q4 2022 at West Port, Jiujiang Economic & Tech Dev Zone, Jiangxi. It spans 1,800 mu, with a planned 150,000-ton/yr high-grade electrolytic copper foil project, eyeing the world's largest copper foil base. This expands Defu Tech's lead in domestic high-grade battery and electronic copper foils.
德思光电
Desi Optoelectronics
Founded in July 2013, the company is based in Chaisang District, Jiujiang, Jiangxi, occupying 40 mu. It specializes in core process components for high-end copper foil and additive technologies. Its main operations cover electronic materials and equipment manufacturing, lab reagents, chemical reagents, products and raw materials. Recently, stressing innovation, it has developed new items like branched alkanes, high-performance organosilicon LED adhesives, fungicides and copper foil additives, widely applied in organic semiconductors, LED lighting, agriculture and new energy sectors.
烁金能源
Shuojin Energy
Jiujiang Shuojin Energy Industry Co., Ltd., founded in Apr. 2022, covers 200 mu. As the sole subsidiary of Jiujiang Defu Tech, it specializes in R&D, design, making and selling electrolytic copper foil equipment. Upholding high-end intelligent manufacturing, it hones the spinning & integral forming process and high-precision metalwork to produce world-class 4-μm copper foil production gear, spurring industry innovation.
斯坦德科技
Standtech Technology
Jiangxi Standard Electrode Technology Co., Ltd., founded in April 2022 and based in West Port, Jiujiang Economic & Tech Dev Zone, Jiangxi, covers 100 mu. It specializes in titanium anodes for electrolytic copper foil, PCB electroplating and other fields. Equipped with advanced domestic coating tech and processes, it upgrades traditional anode plate lines in multiple aspects. High automation minimizes human impact, stabilizes quality and meets higher demands, striving to be a top anode plate coating factory in China.

Corporate culture

企业理念
Enterprise Concept
Innovation in product & technology
Craftsmanship with purpose
企业愿景
Corporate Culture
Building a world-class brand
Setting a benchmark for the copper foil industry
企业精神
Enterprise Spirit
Diligence & Prudence
Pragmatism & Drive
价值观
Values
Customer-focused, value-driven
Creating and sharing success
1985
  • The enterprise was born.
  • Jiujiang Electronic materials factory was established.
2002
  • Restructuring
  • The state - owned enterprise was restructured and renamed Jiujiang Defu Electronic materials Co., Ltd.
2017
  • Reform and development
  • The company carried out a joint - stock reform by converting net assets into shares and was officially renamed "Jiujiang Defu Technology Co., Ltd.". A R & D center was established in the same year.
2018
  • Transformation to new energy
  • Gansu Defu new materials Co., Ltd., a subsidiary, was established.
2021
  • Strategic customers' share - holding
  • In 2021, Chendao Investment, a capital in the downstream lithium - battery industry, and strategic cooperation customers such as LG Chemical took shares in Defu Technology.
2022
  • Global second in shipments
  • Industrial chain closure - production capacity reached 125,000 tons. Ranked first among domestic - funded enterprises. Jiangxi Standard Electrode Technology Co., Ltd., Jiujiang Shuojin Energy Industry Co., Ltd., and Jiujiang Amber New Materials Co., Ltd. were established to achieve industrial chain closure.
2023
  • Successful listing
  • Defu Technology made its initial public offering of shares and was successfully listed on the Shenzhen Stock Exchange.
2024
  • Defu Technology Research Institute officially moved in
  • The entry of the research institute will greatly enhance the company's independent R & D capabilities and provide strong support for the company's sustainable development. In the same year, a wholly - owned grand - subsidiary "Jiangxi Desi Chemical Co., Ltd." was established.
2025
  • Strategic acquisition of Luxembourg copper foil.
  • This has enabled a leapfrog development from a "follower" to a "leader". Defu Technology's total electrolytic copper foil production capacity has jumped to 191,000 tons per year, ranking first in the world, and has officially become a leading company in the global electrolytic copper foil industry.
與我們保持互動
Defu Technology
Global Business Layout
In recent years, with the rise of the global electrification wave, Defu Technology has formulated a globalization strategy, accelerated the expansion of global customers and business, and continuously optimized its global business layout. The company has established 1 R & D center, 3 production bases and 2 sales centers worldwide, with its business covering dozens of countries and regions. In the future, Defu Technology will continue to deepen its overseas business layout, gradually build overseas business centers integrating R & D, production and sales, and further enhance the international influence of its products. Considering that the electrification wave is still developing, the global demand for new energy vehicles and related products will continue to grow. Therefore, by continuously expanding overseas business, Defu Technology is expected to achieve broader market space and business development opportunities.