X-SEPA multilayer polyimide separator for high-temperature lithium-ion batteries
A multilayer porous polyimide separator intended to enable high-temperature electrolyte use and extend lithium-ion battery cycle life in hot operating conditions.
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Problem solved
Addresses accelerated battery degradation and separator shrinkage risk in high-temperature operation, where conventional polyolefin separators may not wet with viscous high-temperature electrolytes.
Application contexts
- High-temperature electric mobility
- Stationary batteries in hot climates
- Data-center backup power
- Marine battery systems
Technical principle
The company describes X-SEPA as a multilayer separator with uniformly ordered three-dimensional pores in a polyimide substrate. Its porous structure and electrolyte wettability are presented as enabling high-temperature electrolyte uptake.
Typical use cases
- Lithium-ion batteries operating in sustained hot climates
- Battery packs where reduced cooling-system burden is under evaluation
Partnership route
How global engineering teams typically engage this asset.
Helpful to include: cell format and separator dimensions · target operating temperature · electrolyte composition and viscosity · cycle-life target · abuse-test requirements · annual volume
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Source & provenance
Translation review status: unreviewed. Publication does not establish technical verification or supplier endorsement.
Original language: JA.
Record updated: .
- X-SEPA-equipped lithium-ion battery achieves extended life at high temperature
https://www.3dom.co.jp/news/350714/
Primary-source candidate; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
- Multilayer porous polyimide membrane, power storage device separator, and power storage device
https://patents.google.com/patent/WO2024096010A1/en
Supporting / discovery source; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
Collector timestamps record when a source was stored, not an independent verification date. Source links provide context; they do not validate every specification, readiness label, certification, or proposed partnership route.