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The overall aim of the SUBLIME (Solid state sUlfide Based LI-MEtal batteries for EV applications) project is to respond to the further battery development challenges for Electric Vehicles and produce next-generation solid-state batteries (SSB) with extreme high energy density of up to 450 Wh/kg as compared to 250–280 Wh/kg for conventional cells to double the driving range of electrical vehicles. The SUBLIME cell consists of a sulfide solid electrolyte (SE), Li metal anode and high nickel content cathode (NMC based). Up to now, we have overcome several challenges of this technology. The sulfide SE has been produced in kilogram scale with high ionic conductivity of 2.5 mS/cm at 25 ℃ and specific cathode and Li metal anode were developed for SSB application. The quality of the developed materials was confirmed in coin cell format, delivering a capacity of 195 mAh/g at 25 ℃. Next, we have been focusing on producing mono and multilayer pouch cells based on scalable process and optimizing the interfacial resistances between the cell components. For this purpose, coatings are applied on Li metal anode and cathode active material. The initial testing results of the pouch cells demonstrate the potential of this technology.

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Developing Sulfide Based Solid State Battery with High Energy Density for Automotive Applications

  • 会议论文

  • 出版模式：

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  • 发表日期：

    2025年

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  • Seyedhosein Payandeh,
  • Jens Ewald

摘要

The overall aim of the SUBLIME (Solid state sUlfide Based LI-MEtal batteries for EV applications) project is to respond to the further battery development challenges for Electric Vehicles and produce next-generation solid-state batteries (SSB) with extreme high energy density of up to 450 Wh/kg as compared to 250–280 Wh/kg for conventional cells to double the driving range of electrical vehicles. The SUBLIME cell consists of a sulfide solid electrolyte (SE), Li metal anode and high nickel content cathode (NMC based). Up to now, we have overcome several challenges of this technology. The sulfide SE has been produced in kilogram scale with high ionic conductivity of 2.5 mS/cm at 25 ℃ and specific cathode and Li metal anode were developed for SSB application. The quality of the developed materials was confirmed in coin cell format, delivering a capacity of 195 mAh/g at 25 ℃. Next, we have been focusing on producing mono and multilayer pouch cells based on scalable process and optimizing the interfacial resistances between the cell components. For this purpose, coatings are applied on Li metal anode and cathode active material. The initial testing results of the pouch cells demonstrate the potential of this technology.