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Effects of catholyte aging on high-nickel NMC cathodes in sulfide all-solid-state batteries

Journal Article · · Materials Horizons
DOI:https://doi.org/10.1039/d4mh01211a· OSTI ID:2569911
 [1];  [2];  [3];  [4];  [2];  [4];  [4];  [4];  [4];  [3];  [5];  [1]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  5. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford Univ., CA (United States)
Sulfide solid-state electrolytes (SSEs) in all-solid-state batteries (SSBs) are recognized for their high ionic conductivity and inherent safety. The LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode offers a high thermodynamic potential of approximately 3.8 V vs. Li/Li+ and a theoretical specific capacity of 200 mA h g−1. However, the practical utilization of NMC811 in sulfide SSBs faces significant interfacial challenges. The oxidation instability of sulfide solid electrolytes against NMC811 and the formation of the cathode electrolyte interphase (CEI) during cycling lead to degradation and reduced cell performance. Volumetric changes in NMC during lithiation and de-lithiation can also cause detachment from sulfide electrolytes or internal particle cracking. Despite extensive galvanostatic cycling studies to address the issues, the calendar life of sulfide SSBs remains poorly understood. Here, we systematically studied the effects of four different catholytes on the calendar aging of LiNbO3 (LNO)-coated NMC811, including Li6PS5Cl (LPSCl), Li3InCl6–Li6PS5Cl (LIC–LPSCl), Li3YCl6–Li6PS5Cl (LYC–LPSCl), and Li10GeP2S12 (LGPS). Our results indicate that LPSCl provides optimal capacity retention when stored at high state-of-charge (SOC) at room temperature, but the LIC–LPSCl cathode shows significant capacity degradation and chemical incompatibility. We also established an effective electrochemical calendar aging testing protocol to simulate daily usage, enabling quick inference of the calendar life of SSBs. In conclusion, this new testing approach accelerates materials selection strategies for high-nickel NMC composite cathodes in sulfide SSBs.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC02-76SF00515; AC02-06CH11357; AC05-00OR22725
OSTI ID:
2569911
Alternate ID(s):
OSTI ID: 2573521
Journal Information:
Materials Horizons, Journal Name: Materials Horizons Journal Issue: 1 Vol. 12; ISSN 2051-6355; ISSN 2051-6347
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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