AC6765 Hard Carbon Single Side Coated Aluminum Foil

One-Sided Coated Hard Carbon Aluminium Film Description

One-sided coated aluminium film made from hard carbon is an emerging anode material primarily used in Sodium-ion batteries, providing a balanced relationship between structural integrity, electrochemical performance, and compatibility with scalable manufacturing processes. Unlike graphite, which performs poorly in Sodium-ion systems, hard carbon possesses a disordered microstructure consisting of randomly oriented graphitic layers and nanopores. This structure facilitates sodium ion storage via both intercalation and pore-filling mechanisms, allowing for a high reversible capacity typically in the range of 250-350 mAh/g.

The aluminium film acts as a lightweight and corrosion-resistant current collector. Although copper is typically used for lithium-ion battery anodes, aluminium is more suitable for Sodium-ion systems due to its stability within the operational voltage range of the anode. Coating only one side of the film allows for a more versatile stacking of electrodes in pouch or cylindrical cell formats, helping to reduce material costs and weight.

Electrochemically, hard carbon exhibits a low operating voltage plateau and minimal volume expansion during cycling, contributing to enhanced cycling stability and a longer battery lifespan. It also demonstrates good performance at low temperatures, making it useful for grid-scale energy storage in various environments. Overall, this material supports the advancement of the next generation of Sodium-ion batteries by integrating performance, scalability, and cost-effectiveness.

Hard Carbon One-Sided Coated Aluminium Film Applications

One-sided coated hard carbon aluminium film is primarily employed as an anode material in Sodium-ion batteries, which are gaining increasing importance for grid-scale energy storage, integration of renewable energy, and backup power systems due to their cost-efficiency and abundance of raw materials. It is also used in affordable stationary storage applications, electric bicycles, and low-speed electric vehicles where high safety, long lifespan, and stable performance are critical. Furthermore, it is being researched for next-generation solid-state batteries and flexible energy storage due to its structural stability and reliable performance under a range of operating conditions.

Hard Carbon One-Sided Coated Aluminium Film Packaging

Our products are packaged in customised cartons of various sizes, tailored to the dimensions of the materials. Smaller items are securely packed in PP cartons, while larger items are placed in bespoke wooden boxes. We ensure strict adherence to packaging specifications and use appropriate cushioning materials to provide optimal protection during transit.

Packaging: Carton, wooden box, or custom.

Please view the packaging details for your information.

Manufacturing Process

1)Testing Procedures

(1)Analysis of chemical composition - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)Mechanical properties testing - Includes tensile strength, yield stress, and elongation tests to assess material performance.

(3)Dimensional testing - Measures thickness, width, and length to ensure compliance with specified tolerances.

(4)Surface quality testing - Inspection for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)Hardness testing - Determines the material hardness to confirm uniformity and mechanical reliability.

For detailed information, please refer to the SAM Testing Procedures.

FAQs on One-Sided Coated Hard Carbon Aluminium Film

Q1. What is one-sided coated hard carbon aluminium film?

It is an anode material primarily used in Sodium-ion batteries, consisting of aluminium film coated on one side with hard carbon to facilitate efficient sodium ion storage.

Q2. Why is hard carbon used instead of graphite?

Hard carbon has a disordered structure that is suitable for sodium ion storage, whereas graphite performs poorly due to its size and intercalation issues with sodium ions.

Q3. What is the typical capacity of this anode material?

The reversible capacity typically ranges from 250 to 350 mAh/g, depending on processing and battery conditions.

Related Information

1.Common Preparation Methods

The production of one-sided coated hard carbon aluminium film begins with the synthesis of hard carbon through the pyrolysis of organic precursors such as phenolic resins, cellulose, or pitch at temperatures typically between 1 000°C and 1 300°C in an inert atmosphere, creating the disordered carbon structure suitable for sodium ion storage. The synthesised hard carbon powder is then mixed with conductive additives and a polymer binder, commonly polyvinylidene fluoride (PVDF), dissolved in a solvent such as N-methyl-2-pyrrolidone (NMP) to create a homogeneous slurry. This slurry is then applied to one side of an aluminium film substrate using coating techniques such as slot-die or doctor blade coating. Following the coating process, the film is dried at elevated temperatures to remove solvent residues and calendared to enhance the uniformity of the coating, adhesion, and electrode density. Finally, the coated film is cut or punched into the desired dimensions to manufacture electrodes suitable for integration into Sodium-ion batteries, ensuring good mechanical strength, electrical conductivity, and electrochemical performance.