All-Solid-State Lithium (Li) Rechargeable Battery With Prolonged Life and Stable Charge/Discharge Performance

Technology #11654

Key Points

  • Improved rechargeable lithium metal battery cell with stable charge/discharge performance
  • Design allows significant improvement in volumetric and gravimetric capacity
  • Enables uniform lithium deposition to prevent the formation of dendrites

Abstract

The University of Central Florida invention describes the cell structure of an all‐solid‐state lithium secondary battery. The proposed design enables uniform lithium deposition to prevent the formation of dendrites. In addition, the design allows a controlled growth of lithium towards a specific direction into a designated area in the cell. The use of lithium metal anodes causes nucleation/growth of dendrites at the surface during multiple battery cycles and/or high‐rate charge/discharge. These dendrites lead to micro‐shorts between the cathode and the anode causing the degradation of the battery. With these distinct features of the proposed cell structure, the battery will have a prolonged life with stable charge/discharge performance and controlled volumetric change of the battery cell.

Benefit

  • Significantly improves the volumetric and gravimetric capacity of the battery cell
  • Prevents inherent issues such as dendrite formation and large volume changes during charge/discharge cycles
  • Allows uniform deposition of the Li while mitigating the overall volume changes of the battery cell

Market Application

  • Electric vehicles
  • Portable electronics
  • Areas where high capacity, long cycle lifetime, and minimum volume changes during charge/discharge are required