Copper Alloy Foil — HS1200

The Copper Alloy Foil from JX Nippon Mining & Metals has higher strength and thinness which implies that more current collectors can be stacked with batteries of the same volume, adding up to enhanced battery energy density. Highly accurate thickness contributes to capacity stability amid individual batteries.

Alloy Thickness
(µm)
Chemical
Composition
(wt%)
Tensile
strength
(MPa)
Elongation
(%)
Roughness
(µm)
Tough pitch copper 5~ Cu >99.9 450 1~2 <1.0
HS1200 6~ Cu-0.12Sn 550 1~2 <1.0

Image Credit: JX Nippon Mining & Metals

Application Examples

Copper Alloy Foil—HS1200 from JX Nippon Mining & Metals

Image Credit: JX Nippon Mining & Metals

Features

  • HS1200 and HS1200-V2 are high-strength copper alloy foil that possesses outstanding heat resistance relating to softening
  • New copper alloy foil is being developed with better resistance than HS1200
  • While slitting, the maximum length is 8,000 m and the maximum width is 640 mm
  • Appropriate for batteries making use of Si-based active materials with huge volume changes.
  • Thin foils can be obtained due to their high strength, and more current collectors can be stacked with batteries having the same volume, contributing to the enhanced battery energy density.
  • HS1200 possesses excellent thermal resistance, allowing high strength to be maintained, even at elevated temperatures.
Copper Foil Thickness (µm) Chemical Composition (wt.%) Tensile Strength (MPa)
HS1200-V2
(NEW)
8~ Cu-0.12Sn 630
HS1200 6~ Cu-0.12Sn 550
Tough Pitch Copper 6~ Cu > 99.9 450
Electro-deposited foil - Cu > 99.9 350
New Foil for LIB
(Under Development)
8~ Cu-0.1Zr 620

All values are representative, not guaranteed. Source: JX Nippon Mining & Metals

Softening Properties

Softning Curve (Annealing Time 0.5H). Image Credit: JX Nippon Mining & Metals

Image Credit: JX Nippon Mining & Metals

Battery Configuration

Battery configuration Positive electrode 2 layers
Negative electrode 3 layers
(Laminated type)
Test temperature 25 °C
Cycle condition Charge 1C, discharge 1C
Positive electrode Current collector foil Al Foil
Positive electrode Active material NCM111
Negative electrode Current collector foil HS1200 or Electrolytic copper foil
Negative electrode Active material Graphite-10wt.%SiO

Source: JX Nippon Mining & Metals

 

Negative Electrode Current-Collector-Foil-Type LiB Cycle Test.

Negative Electrode Current-Collector-Foil-Type LiB Cycle Test. Image Credit: JX Nippon Mining & Metals

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