Degradation of Commercial Lithium-Ion Cells as a Function of Chemistry and Cycling Conditions

Energy storage systems with Li-ion batteries are increasingly deployed to maintain a robust and resilient grid and facilitate the integration of renewable energy resources. However, appropriate selection of cells for different applications is difficult due to limited public data comparing the most commonly used off-the-shelf Li-ion chemistries under the same operating conditions. This article details a multi-year cycling study of commercial LiFePO 4 (LFP), LiNi x Co y Al 1−x−y O 2 (NCA), and LiNi x Mn y Co 1−x−y O 2 (NMC) cells, varying the discharge rate, depth of discharge (DOD), and environment temperature. The capacity and discharge energy retention, as well as the round-trip efficiency, were compared.…

• UD
  U.S. Department of Energy

  Awards: 0003525, DE-NA-0003525
• CU
  City University of New York
• NN
  National Nuclear Security Administration

  Award: DE-NA-0003525
• EI
  Energy Institute, City University of New York
• OO
  Office of Electricity

  Award: DE-NA-0003525
• SN
  Sandia National Laboratories

  Award: DE-NA-0003525