High Energy Density Lithium-Ion Batteries with Extreme Fast Charging Capability
Category: Mechanical/Materials
Developers: Oak Ridge National Laboratory; Soteria Battery Innovation Group
Product Description:Metalized polyethylene terephthalate films were developed to replace the metal foils in lithium-ion batteries. These films can increase cell energy density, extend the driving range, and reduce battery cost. Relative to traditional metal foil counterparts, these collectors facilitate a substantial reduction in weight (73%), thickness (33%) and cost (85%). The increasing demand for aluminum (Al) and copper (Cu) in electrification and vehicle lightweighting is driving these metals toward near-critical status in the medium term. This study introduced metalized polymer films by depositing an Al or Cu thin layer onto two sides of a polyethylene terephthalate (PET) film (called mPET/Al and mPET/Cu) as lightweight, cost-effective alternatives to traditional metal current collectors in LIBs. The metalized mPET/Cu and mPET/Al foils were utilized as current collectors in LIBs to enhance cell energy density under XFC conditions. Pouch cells based on the metallized current collectors showed significant enhancements to energy density, with a 41% increase (337 Wh/kg) at 0.3C and a 32% increase (286 Wh/kg) at 6C under XFC conditions. After 1,000 cycles at 6C, the pouch cell maintained a respectable energy density of 120 Wh/kg at 22°C, underscoring its long-term performance viability.
Developers: Oak Ridge National Laboratory; Soteria Battery Innovation Group
Product Description:Metalized polyethylene terephthalate films were developed to replace the metal foils in lithium-ion batteries. These films can increase cell energy density, extend the driving range, and reduce battery cost. Relative to traditional metal foil counterparts, these collectors facilitate a substantial reduction in weight (73%), thickness (33%) and cost (85%). The increasing demand for aluminum (Al) and copper (Cu) in electrification and vehicle lightweighting is driving these metals toward near-critical status in the medium term. This study introduced metalized polymer films by depositing an Al or Cu thin layer onto two sides of a polyethylene terephthalate (PET) film (called mPET/Al and mPET/Cu) as lightweight, cost-effective alternatives to traditional metal current collectors in LIBs. The metalized mPET/Cu and mPET/Al foils were utilized as current collectors in LIBs to enhance cell energy density under XFC conditions. Pouch cells based on the metallized current collectors showed significant enhancements to energy density, with a 41% increase (337 Wh/kg) at 0.3C and a 32% increase (286 Wh/kg) at 6C under XFC conditions. After 1,000 cycles at 6C, the pouch cell maintained a respectable energy density of 120 Wh/kg at 22°C, underscoring its long-term performance viability.
