AC6762 LiNiCoMnO2 (NCM811) Single Side Coated Aluminum Foil

LiNiCoMnO2 (NCM811) Single Side Coated Aluminum Foil Description

LiNiCoMnO2 (NCM811) single side coated aluminum foil is a high-performance cathode material widely used in lithium-ion batteries, known for its superior energy density and electrochemical stability. The active material comprises lithium nickel cobalt manganese oxide with an 8:1:1 molar ratio, which significantly increases the nickel content compared to other NCM compositions. This higher nickel ratio enhances the specific capacity, typically ranging between 190 and 200 mAh/g, by providing more available lithium ions for intercalation and deintercalation during charge and discharge cycles. The aluminum foil substrate, usually around 15 to 20 microns thick, acts as a current collector and supports the active material coated on one side, with the coating thickness optimized to balance energy output and mechanical robustness.

Structurally, NCM811 features a layered crystal arrangement that facilitates efficient lithium-ion transport, contributing to high rate capability and excellent cycle stability. The material exhibits good thermal stability, which is critical for safety in high-energy applications like electric vehicles and large-scale storage. The cathode composition often includes conductive additives such as carbon black and a polymer binder like PVDF to improve electrical conductivity and mechanical cohesion of the electrode layer.

Despite the challenges posed by increased nickel content, such as potential thermal instability and capacity fading, advancements in material processing and coating techniques have mitigated these issues, resulting in a cathode that combines high energy density with reliable long-term performance. This makes LiNiCoMnO2 (NCM811) single side coated aluminum foil a preferred choice for next-generation lithium-ion batteries demanding high power, extended life, and safety.

LiNiCoMnO2 (NCM811) Single Side Coated Aluminum Foil Applications

LiNiCoMnO2 (NCM811) Single Side Coated Aluminum Foil is widely used in high-energy lithium-ion batteries for electric vehicles, where its high capacity and energy density help improve driving range and performance. It is also employed in portable electronic devices such as smartphones, laptops, and tablets due to its stable cycling and lightweight properties. Additionally, this material is utilized in large-scale energy storage systems for renewable energy integration and grid stabilization, benefiting from its long cycle life and safety features. Overall, NCM811 cathodes are favored in applications requiring high power, durability, and efficient energy storage.

LiNiCoMnO2 (NCM811) 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 (NCM811) 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 LiNiCoMnO2 (NCM811) single side coated aluminum foil involves synthesizing the NCM811 active material through a co-precipitation process, where nickel, cobalt, and manganese salts are mixed in an 8:1:1 molar ratio to form a hydroxide precursor. This precursor is then washed, dried, and calcined at high temperatures with lithium sources such as lithium carbonate to create the layered oxide structure. The resulting powder is combined with conductive carbon additives and a polymer binder like polyvinylidene fluoride (PVDF) dissolved in a solvent such as N-methyl-2-pyrrolidone (NMP) to form a uniform slurry. This slurry is coated onto one side of aluminum foil using methods such as doctor blade or slot-die coating. After coating, the foil is dried to remove solvents and then calendared to improve electrode density and adhesion. Finally, the coated foil is cut or punched into desired sizes for use as cathodes in lithium-ion battery assembly, ensuring optimal mechanical strength, electrical conductivity, and electrochemical performance.