AC6759 LiNiCoMnO2 (NCM622) Single Side Coated Aluminum Foil

LiNiCoMnO2 (NCM622) Single Side Coated Aluminum Foil Description

The LiNi₀.₆Co₀.₂Mn₀.₂O₂ (NCM622) single-side coated aluminum foil is a high-performance cathode material widely used in lithium-ion batteries. It consists of a 16-micron-thick aluminum foil substrate coated on one side with a layer of lithium nickel cobalt manganese oxide in a 6:2:2 ratio. This configuration offers a balance between high energy density, thermal stability, and cost-effectiveness, making it suitable for applications in electric vehicles, energy storage systems, and portable electronics.

The coated area typically measures 241 mm in length and 175 mm in width, with a 12.5 mm uncoated margin on each side to facilitate handling and assembly. The coating has an area density of about 11 ± 0.20 mg/cm² and a thickness of approximately 38 microns, resulting in a total electrode thickness of around 54 microns. The active material comprises 97.5% NCM622, with 1% polyvinylidene fluoride (PVDF) as a binder and 1.5% conductive carbon (Super P) to enhance electrical conductivity.

Electrochemically, the NCM622 cathode exhibits a specific capacity of approximately 170 mAh/g when cycled between 3.0 V and 4.3 V versus Li/Li⁺ at a 0.1C rate. This performance is achieved using an electrolyte composed of 1.0 M LiPF₆ in a solvent mixture of ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC) in a 1:1:1 volume ratio, with an addition of 1.0% vinylene carbonate (VC) to improve stability.

Due to the single-sided coating, the electrode may exhibit curling after calendering. Therefore, it is recommended to perform further calendaring at the user's facility to enhance packing density, electronic conductivity, and the binding of electrode materials. Proper storage conditions, such as in a vacuum box, vacuum oven, or glove box, are essential to prevent degradation of the electrode material.

Overall, the NCM622 single-side coated aluminum foil offers a well-balanced solution for lithium-ion batteries, combining high energy density with good thermal stability and cost-effectiveness, making it suitable for various applications, including electric vehicles and portable electronics.

LiNiCoMnO2 (NCM622) Single Side Coated Aluminum Foil Applications

Electric Vehicles (EVs): NCM622 is extensively used in EV batteries due to its high capacity and stability, contributing to longer driving ranges and improved safety.

Energy Storage Systems (ESS): In grid storage and renewable energy integration, NCM622-based cathodes provide consistent performance over numerous charge-discharge cycles, making them suitable for long-term energy storage solutions.

Portable Electronics: Devices like smartphones, laptops, and tablets benefit from NCM622's high specific capacity and stable cycling performance, leading to longer battery life and reliability.

LiNiCoMnO2 (NCM622) Single Side Coated Aluminum Foil Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

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

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

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

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

Please refer to the SAM testing procedures for detailed information.

LiNiCoMnO2 (NCM622) Single Side Coated Aluminum Foil FAQs

Q1. Why use a single-side coating instead of double-side?

Single-side coating reduces electrode weight and thickness, critical for applications requiring lightweight or flexible designs (e.g., wearable electronics). It also lowers material costs and simplifies manufacturing, while the uncoated side prevents direct electrolyte contact with aluminum, reducing corrosion and parasitic reactions at high voltages (>4.3V).

Q2. How is the coating applied?

The NCM111 slurry (active material, conductive carbon, PVDF binder) is uniformly coated via slot-die or doctor-blade techniques, followed by drying and calendaring to achieve optimal density (≥3.2 g/cm³). Precision control ensures coating uniformity (Ra <0.2 μm) and adhesion.

Q3. What are the key advantages of this material?

High Conductivity: Aluminum’s low resistivity (~2.65×10^-8 Ω·m) ensures efficient current collection.

Mechanical Durability: The foil’s tensile strength (>150 MPa) withstands electrode calendaring and cell assembly.

Electrochemical Stability: The NCM111 layer’s balanced transition metal ratio (1:1:1) offers moderate energy density (~160 mAh/g at 0.1C) with thermal stability (oxygen release >200°C).

Interfacial Efficiency: Isolated coating minimizes lithium plating and electrolyte decomposition, enhancing cycle life.

Related Information

1.       Common Preparation Methods

The preparation of LiNi₀.₆Co₀.₂Mn₀.₂O₂ (NCM622) single-side coated aluminum foil cathodes involves a series of meticulous steps to ensure optimal electrochemical performance. Initially, the active material, NCM622 powder, is synthesized through a co-precipitation method, where nickel, cobalt, and manganese salts are precipitated in a controlled environment to form a uniform precursor. This precursor is then calcined at high temperatures to achieve the desired layered oxide structure.

Once the active material is prepared, it is mixed with conductive additives like Super P carbon and a binder such as polyvinylidene fluoride (PVDF) in a solvent like N-methyl-2-pyrrolidone (NMP) to form a homogeneous slurry. The typical weight ratio for this mixture is 8:1:1 for active material, conductive agent, and binder, respectively.  This slurry is then uniformly coated onto one side of an aluminum foil current collector using techniques like doctor blade coating. The coated foil is subsequently dried at elevated temperatures to remove the solvent and then calendered to enhance electrode density and adhesion. The final electrode exhibits a specific capacity of approximately 170 mAh/g when cycled between 3.0 V and 4.3 V versus Li/Li⁺ at a 0.1C rate.

This meticulous preparation process ensures that the NCM622 single-side coated aluminum foil cathodes possess the necessary structural and electrochemical properties for high-performance lithium-ion batteries used in various applications, including electric vehicles and portable electronics.