Protonation Stimulates the Layered to Rock Salt Phase Transition of Ni‐Rich Sodium Cathodes
- Energy &, Environment Directorate Pacific Northwest National Laboratory Richland WA 99352 USA
- Department of Chemical Engineering Texas A&,M University College Station TX 77843‐3122 USA, Department of Chemistry Texas A&,M University College Station TX 77843‐3122 USA
- Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland WA 99352 USA
- Chemical Sciences and Engineering Division Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Department of Materials Science and Engineering Dongguk University Seoul 04620 Republic of Korea
- Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99352 USA
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Chemical Engineering Texas A&,M University College Station TX 77843‐3122 USA, Department of Chemistry Texas A&,M University College Station TX 77843‐3122 USA, Department of Materials Science and Engineering Texas A&,M University College Station TX 77843‐3122 USA
Protonation of oxide cathodes triggers surface transition metal dissolution and accelerates the performance degradation of Li‐ion batteries. While strategies are developed to improve cathode material surface stability, little is known about the effects of protonation on bulk phase transitions in these cathode materials or their sodium‐ion battery counterparts. Here, using NaNiO 2 in electrolytes with different proton‐generating levels as model systems, a holistic picture of the effect of incorporated protons is presented. Protonation of lattice oxygens stimulate transition metal migration to the alkaline layer and accelerates layered‐rock‐salt phase transition, which leads to bulk structure disintegration and anisotropic surface reconstruction layers formation. A cathode that undergoes severe protonation reactions attains a porous architecture corresponding to its multifold performance fade. This work reveals that interactions between electrolyte and cathode that result in protonation can dominate the structural reversibility/stability of bulk cathodes, and the insight sheds light for the development of future batteries.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- Texas A&M University; USDOE; USDOE Office of Electricity (OE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357; AC05-76RL01830
- OSTI ID:
- 2281063
- Alternate ID(s):
- OSTI ID: 2337816
OSTI ID: 2348885
OSTI ID: 2484295
OSTI ID: 2281442
- Report Number(s):
- PNNL-SA--169982; 2308380
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Journal Issue: 13 Vol. 36; ISSN 0935-9648
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English