AC6758 LiNiCoMnO2 (NCM622) Single Side Coated Cathode Electrode Disc

LiNiCoMnO2 (NCM622) Single Side Coated Cathode Electrode Disc Description

The LiNiCoMnO₂ (NCM622) Single-Side Coated Cathode Electrode Disc is a specialized lithium-ion battery component engineered for high energy density and electrochemical stability. The cathode material, with a stoichiometry of LiNi₀.₆Co₀.₂Mn₀.₂O₂, crystallizes in a layered α-NaFeO₂ structure (space group *R-3m*), characterized by alternating layers of lithium and transition metal oxides. This configuration facilitates efficient lithium-ion intercalation and deintercalation, delivering a reversible specific capacity of ~170-190 mAh/g at 0.1C rates. The aluminum foil substrate, with a thickness of 15 μm, serves as a highly conductive current collector, exhibiting low electrical resistivity (~2.65×10⁻⁸ Ω·m) and robust mechanical strength (>150 MPa tensile strength), ensuring structural integrity during electrode fabrication and cell assembly.

The single-side coating, typically 60-100 μm thick, is composed of NCM622 powder, conductive carbon additives (e.g., 3-5 wt% carbon black), and polyvinylidene fluoride (PVDF) binder, uniformly applied via precision techniques such as slot-die coating or doctor-blading. Post-coating calendaring under controlled pressure (5-10 MPa) optimizes electrode density (≥3.5 g/cm³) and adhesion strength (>1.8 N/cm), minimizing delamination risks during cycling. The NCM622 composition balances nickel’s high capacity contribution with cobalt’s structural stability and manganese’s thermal resilience, achieving oxygen release onset temperatures exceeding 210°C under inert conditions. Surface modifications, such as ultrathin Al₂O₃ coatings via atomic layer deposition (ALD) or trace dopants (e.g., Ti, Mg), enhance interfacial stability by suppressing parasitic reactions and reducing charge-transfer resistance (R_ct < 35 Ω·cm²), even at elevated voltages (up to 4.4V).

The material exhibits moderate volume changes (~2-4% lattice strain) during cycling, mitigated by its optimized transition metal ratio, which reduces Li/Ni cation mixing (<5%) and phase transitions. Advanced manufacturing protocols, including laser thickness monitoring and plasma surface activation, ensure coating uniformity (thickness tolerance ±2 μm) and tailored porosity for efficient electrolyte infiltration. The single-side design minimizes direct electrolyte contact with the aluminum substrate, preventing corrosion and lithium plating under high-voltage operation. This configuration also aligns with recyclability, as the aluminum foil and NCM622 layer can be efficiently separated in closed-loop processes. Combining high energy density, thermal resilience, and mechanical durability, this electrode disc exemplifies a robust platform for advanced battery research and performance validation.

LiNiCoMnO2 (NCM622) Single Side Coated Cathode Electrode Disc Applications

The LiNi₀.₆Co₀.₂Mn₀.₂O₂ (NCM622) single-side coated cathode electrode disc is a versatile component widely utilized in various lithium-ion battery applications due to its high energy density, favorable electrochemical performance, and cost-effectiveness.

In the realm of electric vehicles (EVs), NCM622 serves as a prominent cathode material. Its balanced composition offers a compromise between the high capacity of nickel-rich cathodes and the thermal stability provided by manganese and cobalt. This balance makes NCM622 suitable for EV batteries, where both energy density and safety are paramount.

Beyond EVs, NCM622 is employed in portable electronic devices such as smartphones, laptops, and tablets. The material's high specific capacity and stable cycling performance contribute to longer battery life and reliability, critical factors in consumer electronics.

In energy storage systems (ESS), NCM622-based cathodes are used in grid storage and renewable energy integration. Their ability to deliver consistent performance over numerous charge-discharge cycles makes them suitable for applications requiring long-term energy storage solutions.

Furthermore, NCM622 is being explored in the development of all-solid-state batteries (ASSBs). Research indicates that surface modifications, such as coatings with materials like TiO₂-LiF, can enhance the cycling stability and performance of NCM622 cathodes in ASSBs, addressing challenges related to interfacial stability and ionic conductivity.

LiNiCoMnO2 (NCM622) Single Side Coated Cathode Electrode Disc 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 Cathode Electrode Disc FAQs

Q1. Why is high nickel content used in NCM?

High-nickel variants (e.g., NCM811) boost energy density (~250 mAh/g) but face challenges like oxygen loss at high voltages (>4.5V) and structural degradation. Innovations like surface coatings (e.g., sodium phytate) and doping (e.g., Ti, Mg) mitigate these issues, improving thermal stability and cycle life.

Q2. How does NCM enhance battery safety?

Modifications such as sodium phytate coatings delay thermal runaway onset temperatures by 45% (125.9°C→184.8°C), while high-entropy doping reduces lattice strain (<0.5%) to prevent cracks. These strategies ensure structural integrity even under extreme conditions.

Q3. How does NCM compare to LFP or LCO cathodes?

NCM offers higher energy density than lithium iron phosphate (LFP) but requires stabilization for safety. Compared to lithium cobalt oxide (LCO), it reduces cobalt reliance and costs while maintaining performance.

Related Information

1.       Common Preparation Methods

The preparation of a LiNi₀.₆Co₀.₂Mn₀.₂O₂ (NCM622) single-side coated cathode electrode disc involves a series of precise steps to ensure optimal electrochemical performance and structural integrity. Initially, the active material, NCM622 powder, is synthesized through a co-precipitation method. In this process, nickel, cobalt, and manganese sulfate solutions are mixed in a molar ratio of 60:20:20. Aqueous sodium hydroxide or potassium hydroxide is then added to the solution to precipitate the hydroxide precursor Ni₀.₆Co₀.₂Mn₀.₂(OH)₂. The resulting precipitate is filtered, washed, and dried at temperatures ranging from 80°C to 200°C for 4 to 8 hours. Subsequently, the dried precursor undergoes a heat treatment in an atmospheric furnace at 300°C to 600°C for 8 to 15 hours to obtain the oxide form. This oxide is then mixed with lithium salts, such as lithium carbonate, in a molar ratio of 1:1 to 1:1.15, along with flux additives like B₂O₃ or LiCl to facilitate the solid-state reaction. The mixture is thoroughly homogenized and subjected to a two-step sintering process: first at 700°C to 800°C in an air stream for 6 to 8 hours, followed by sintering at 850°C to 950°C in an oxygen stream for 8 to 15 hours. After sintering, the product is cooled, pulverized, and sieved through a 325-mesh screen to obtain the final NCM622 powder. This powder is then mixed with conductive carbon (Super P) and a binder like polyvinylidene fluoride (PVDF) in a weight ratio of 8:1:1 using N-methyl-2-pyrrolidone (NMP) as the solvent to form a homogeneous slurry. The slurry is coated onto one side of an aluminum foil current collector using techniques like doctor blade coating. The coated foil is dried at 70°C for 3 hours to remove the solvent and then calendered to enhance electrode density and adhesion. Finally, the electrode sheet is punched into 15 mm diameter discs, which are used as cathodes in coin cell assembly for lithium-ion batteries.