Application value: from performance improvement to scene implementation

Breakthrough in high-rate charge and discharge performance

Used in ultra-fast charging power batteries for new energy vehicles (800V high-voltage platform), supporting 10C fast charging (15 minutes full charge) and 20C pulse discharge (meeting rapid acceleration power requirements). Compared with copper foil current collector batteries, the charging time is shortened by 40% and the discharge power is increased by 25%.

Adapted to industrial energy storage batteries (such as data center backup power supplies and grid peaking batteries), under 15C high-frequency charge and discharge conditions, the battery cycle life is increased by more than 20% (capacity retention rate ≥ 85% after 500 cycles).

Reduce costs and increase efficiency on the production side

The surface roughness Ra≤0.5μm reduces the problems of coating leakage and thickness difference when coating electrode slurry (such as ternary positive electrode slurry, silicon-based negative electrode slurry), and the slurry utilization rate increases by 5%-8%.

The ultra-thin specification (0.03mm) can reduce the current collector weight ratio (from 12% of traditional copper foil to 8%), indirectly increasing the battery energy density by about 3-5Wh/kg.

Products Parameter

Products name	Ni200 Nickel Plate
Chemical Composition	Ni≥99.6%
Length	Customizable
Width	2mm-330mm
Thickness	0.03mm-0.1mm
Ra	≤0.5 μm
Density	8.9g/cm³
Surface Treatment	Polished/Sanding
Tensile Strength	380-410MPa
Elongation	≥40%

Three core technical advantages: Supporting high-rate performance breakthroughs

Ultra-low impedance transmission: reduce high-rate current loss

Advantages of electrical conductivity: The conductivity of Ni200 nickel plate reaches 143 S/m, which is 39% higher than traditional copper foil (103 S/m) and 19% higher than ordinary nickel alloy (≤120 S/m), which can significantly reduce the current collector's own resistance.

Current distribution characteristics: The high-purity nickel matrix has no impurities (Fe and Cu content ≤0.1%), avoiding micro-resistance areas formed by impurities, allowing the current to be evenly distributed on the surface of the current collector, reducing local overheating (the temperature difference can be controlled within 5°C at high rates), and avoiding the failure of active materials caused by current concentration.

Strong resistance to electrolyte erosion: ensuring long-term cycle stability

Self-passivation protection mechanism: In the presence of lithium salt-carbonate (such as LiPF₆-EC/DEC) and high-concentration electrolyte (such as 4.5V high-voltage system), the Ni200 nickel plate can quickly form a 2-5nm dense passivation film (mainly composed of NiO and Ni (OH)₂) on the surface to prevent the electrolyte from corroding the nickel matrix;

Corrosion resistance data verification: Under 60℃, 10C cycle conditions, immersed in 1mol/L LiPF₆-EC/EMC electrolyte, the corrosion rate of Ni200 nickel plate is only 0.002mm/year, much lower than copper foil (0.015mm/year) and 304 stainless steel (0.008mm/year), which can avoid the sudden increase in internal resistance caused by current collector corrosion (cycle 500 Secondary internal resistance increase ≤8%).

Structural fatigue resistance: adapted to high-rate charge and discharge stress

Mechanical performance support: Ni200 nickel plate has a tensile strength of ≥380MPa and an elongation of ≥40%. It can be processed into a 0.03-0.1mm ultra-thin current collector by cold rolling. It is not prone to breakage or wrinkles under the electrode expansion/shrinkage stress generated by high-rate charge and discharge (such as 20C pulse discharge);

Welding stability: It is suitable for laser welding and ultrasonic welding processes. The tensile strength retention rate of the welding joint is ≥90%, which meets the high-strength connection requirements of high-rate battery tabs and current collectors and avoids interruption of current transmission caused by welding failure.