Nanocellulose lithium battery separator_Nanjing Tianlu Nanotechnology_Green new energy material solutions

Against the background of the rise of new energy vehicles and energy storage industries, lithium batteries have become the core carrier of global energy transformation. The technological upgrade of lithium battery separators directly determines the development level of the industry. traditional polyolefin ( Due to shortcomings such as insufficient thermal stability and easy shrinkage at high temperatures, PE/PP ) separators are difficult to meet the needs of high-safety, high-energy-density lithium batteries. Nanocellulose ( CNF/CNC ), as a new green new energy material, has become the core choice for separator upgrades with its unique advantages. Nanjing Tianlu Nano Technology Co., Ltd. (hereinafter referred to as ' Nanjing Tianlu ' ) is a domestic professional R&D and production enterprise in the field of nanocellulose lithium battery separators, assisting the green upgrade of the industry.

Nanocellulose breaks the shackles of traditional separator technology and injects new momentum into the lithium battery industry by virtue of its core characteristics such as ultra-high thermal stability, ultra-strong mechanical strength, nano-scale porous structure and full life cycle green environmental protection. Nanjing Tianlu, located in Jiangning District, Nanjing, has been deeply involved in the field of nanocellulose for many years. Relying on the advantages of local location, talents and agricultural and forestry resources, and with the concept of ' green empowerment and technology drive ' , relying on solid technology accumulation and large-scale production capacity, it promotes the industrialization of nanocellulose lithium battery separators and provides customers with professional solutions.

1. The core mission of lithium battery separators and the pain points of traditional materials

1. Three core functions of diaphragm

As the core component of lithium batteries, separators carry three major missions: physically isolate the positive and negative electrodes to prevent short circuits, build lithium ion conduction channels to ensure charge and discharge efficiency, and maintain dimensional stability at high temperatures to suppress thermal runaway. They are the last line of defense for battery safety. High-quality separators are the key to improving battery safety and lifespan.

2. The fatal shortcomings of traditional polyolefin separators

Traditional polyolefin ( PE/PP ) separators are difficult to meet the needs of industry upgrades and have significant shortcomings: the softening point is only 130–160°C , and the shrinkage rate at high temperatures exceeds 50% , which can easily cause short-circuit and fire; the surface hydrophobicity leads to poor liquid absorption and retention, increased internal resistance, and shortened cycle life; weak puncture resistance, easy to be penetrated by lithium dendrites; and petroleum-based materials are difficult to degrade and have a high carbon footprint, which is contrary to the ' double carbon ' trend. Nanocellulose separators have become the best alternative.

2. Nanocellulose: a revolutionary upgrade solution for lithium battery separators

1. Material origin: high-performance nanomaterials from nature

Nanocellulose is a green material that disassembles natural cellulose to the nanometer scale (diameter 1–100 nm , aspect ratio >100 ) through chemical, mechanical or biological methods. It is divided into CNF (long fiber, high flexibility, suitable for separator substrate / coating) and CNC (high crystallinity, high strength, suitable for separator reinforcement / pore creation). The two synergistically meet the core needs of lithium battery separators.

2. Five core advantages, comprehensively surpassing traditional diaphragms

The core advantages of nanocellulose are the key for Nanjing Tianlu to promote the implementation of nanocellulose lithium battery separator products and win industry recognition . Relying on a deep understanding of material properties, Nanjing Tianlu transforms material advantages into practical solutions to help customers improve product competitiveness.

( 1) Extreme thermal stability: completely solve the hidden danger of high temperature shrinkage

The thermal decomposition temperature of nanocellulose reaches 260-300℃. ，The thermal shrinkage rate at 200℃ is <5% , which is much better than traditional separators ( >50% ). It does not melt or shrink at high temperatures, preventing thermal runaway from the source. Its natural flame retardant properties further strengthen the battery safety line and is suitable for various high-end lithium battery scenarios.

( 2) Super mechanical properties: resist dendrites and prevent puncture and short circuit

Nanocellulose has a tensile strength of 300-500 MPa and an elastic modulus of 10-30 GPa . The interwoven nanofiber network increases the puncture resistance of the separator by more than 40% , which can effectively inhibit the penetration of lithium dendrites. At the same time, ultra-thin processing of 8-20 μm can be achieved , taking into account strength and battery energy density.

( 3) Nano-scale porous structure: high-speed ion channel, fast charging and long life

The nanocellulose separator has a porosity of 50%–80% and a pore size of 10–50 nm evenly distributed. The surface hydroxyl groups improve the electrolyte affinity, increase the liquid absorption rate by 30%–50% , increase the liquid retention rate 2by more than 20%, and have an ionic conductivity of 0.4–0.7 mS/cm . Its core competitiveness is to reduce internal resistance, improve fast charging performance, and extend battery cycle life.

( 4) Green and sustainable: full life cycle carbon neutrality

Nanocellulose is a 100% bio-based material. The raw materials are renewable and waste is degradable. The carbon footprint is more than 70% lower than that of petroleum-based separators , which is in line with the ' double carbon ' strategy. Nanjing Tianlu adopts low-emission green technology in the water system. Its nanocellulose lithium battery separator-related products have passed EU REACH and US FDA certification, adapting to global high-end environmental protection needs.

( 5) High designability: adaptable to diverse high-end scenarios

Nanocellulose can be modified to achieve functional customization, and can be purified to form a film or compounded with a variety of materials to create a special nanocellulose lithium battery separator that is suitable for the next generation of various battery systems. With its mature modification technology, Nanjing Tianlu can customize products according to customer needs to match the diversified upgrading needs of the industry.

Nanjing Tianlu is deeply involved in the field of nanocellulose . With full-chain technology, large-scale production capacity and professional services, it promotes the industrialization of nanocellulose lithium battery separators, provides core material support for the new energy industry, and is committed to becoming a leading domestic solution provider.

As a high-tech enterprise, Nanjing Tianlu is rooted in Jiangning District, Nanjing. It relies on regional advantages to form the core competitiveness of large-scale production, full-chain technology, and customized services. It adheres to the concept of ' bio-based materials and green energy for the future ' and builds a complete industrial system from raw materials to services.

In terms of production, Nanjing Tianlu has 25000a square meter modern production base with a stable production capacity of 10,000 tons, which can meet the needs of large-volume orders and small-volume customization. It relies on surrounding agricultural and forestry resources to optimize processes and improve product cost-effectiveness.

Technically, the company has conquered core technologies such as TEMPO oxidation, accurately controlled product performance, and launched special products such as TL-CNF lithium battery separator coating fluid and TL-CNC separator enhancer. It has passed multiple authoritative certifications and is compatible with the processes of mainstream separator manufacturers. It can be upgraded without significantly modifying the production line.

In terms of services, Nanjing Tianlu is equipped with a professional technical team to provide full-process technical support. Its nanocellulose separator has been proven by the market, with a 200°C/30min thermal shrinkage rate of <3% and ，a 1C cycle 1000capacity retention rate of >85% . It has passed rigorous safety tests and has won customer recognition and industry reputation.

3. Nanocellulose lithium battery separator market prospects: The golden age has arrived

The global lithium battery separator market is expected to 2030reach US$100 million annually 75, with a compound annual growth rate of more than 15% , providing broad space for nanocellulose lithium battery separators. The ' double carbon ' strategy and the EU green directive promote the substitution of bio-based materials, the policy dividends are highlighted, and the industry has huge potential.

At present, nanocellulose separators are reaching an inflection point in industrialization. From 2025 to 2026 , the production capacity will exceed 10,000 tons, the cost will be reduced by 50% , and it will gradually enter the mainstream supply chain. Nanjing Tianlu will rely on its own advantages to continue technological innovation and product iteration, promote high-quality development of the industry, and fulfill its mission of green energy.

4. Conclusion: Empowering the future of energy with the power of nature

Nanocellulose is redefining lithium battery separator standards and promoting the upgrading of the new energy industry with its core values ​​of safety, efficiency, and greenness. Nanjing Tianlu adheres to its development philosophy and provides nanocellulose lithium battery separator solutions to global lithium battery companies with leading technology, large-scale production capacity, and customized services to help the energy structure transition to a low-carbon and sustainable transformation.

Choose nanocellulose lithium battery separator and choose a safer and greener future; Nanjing Tianlu is willing to work with you to enter the golden era of new energy and build a green and low-carbon future with professional solutions.