Putting Kevlar® MicroCore™
to the test
Kevlar® MicroCore™ did not burn nor generate smoke
during high-temperature exposure >200°C
Test details
- Test method: Yamagata University test method
- Test protocol: Discharged battery was placed in an oven, exposed to elevated
- temperatures (increasing at 5°C/minute) and voltage was measured.
- Test cell construction:
- Battery capacity: 2Ah
- Cathode: NCM523
- Anode: Graphite
- Electrolyte: 1M LiPF6 ED:DEC (1:1 vol%) + 1 wt% VC
*Independent researchers at Yamagata University in Japan conducted this test on NIPPON KODOSHI CORPORATION (NKK) TopNove™ made with DuPont™ Kevlar® MicroCore™.Test results may vary depending on the cell chemistry and construction.
Kevlar® MicroCore™ —
Did not burn at >200°C
Unlike other materials currently used in battery separators, Kevlar® MicroCore™ does not shrink under high temperature up to 300℃ and helps improve the battery safety when exposed to high temperatures.
Kevlar® MicroCore™ doesn’t shrink—even at temperatures up to 300°C
Test details
- Test method: Yamagata University test method
- Test protocol: Separator sample was held between plates and placed in oven at temperatures of 150°C and 300°C for 12 hours. Visual inspection was conducted after high-temperature exposure.
*Independent researchers at Yamagata University in Japan conducted this test on NIPPON KODOSHI CORPORATION (NKK) TopNove™ made with DuPont™ Kevlar® MicroCore™. Test results may vary depending on the cell chemistry and construction.
Kevlar® MicroCore™ —
excellent wettability
Features excellent wettability, allowing use of a safer electrolyte with higher viscosity, which is difficult to use with incumbent microporous separators.
Test details
- Test method: NIPPON KODOSHI CORPORATION (NKK) test method
- Test protocol: 50 µL of propylene carbonate (PC) was dropped on each separator
material and a visual observation was made.
Kevlar® MicroCore™ features excellent
ionic conductivity
Test details
- Test method: Yamagata University test method
- Test protocol: Direct current resistance (DCR) was measured at state of charge (SOC)
of 20%, 50% and 80%. - Test cell construction:
- Battery capacity: 45mAh
- Cathode: NCM523
- Anode: Graphite
- Electrolyte: 1M LiPF6 ED:DEC (1:1 vol%) + 1 wt% VC
*Independent researchers at Yamagata University in Japan conducted this test on NIPPON KODOSHI CORPORATION (NKK) TopNove™ made with DuPont™ Kevlar® MicroCore™. Test results may vary depending on the cell chemistry and construction.
Kevlar® MicroCore™ demonstrates high
capacity retention
Test details
- Test method: Yamagata University test method
- Test protocol: Stored battery at 60°C and measured discharge capacity over time.
- Test cell construction:
- Battery capacity: 1Ah
- Cathode: NCM523
- Anode: Graphite
- Electrolyte: 1M LiPF6 ED:DEC (1:1 vol%) + 1 wt% VC
*Independent researchers at Yamagata University in Japan conducted this test on NIPPON KODOSHI CORPORATION (NKK) TopNove™ made with DuPont™ Kevlar® MicroCore™. Test results may vary depending on the cell chemistry and construction.
