Suppressing the Voltage Decay of Low-Cost P2-Type Iron Based Cathode Materials for Sodium-ion Batteries
- Chinese Academy of Sciences (CAS), Beijing (China). Key Lab. for Renewable Energy. Beijing Key Lab. for New Energy Materials and Devices. Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences; Inner Mongolia Univ., Hohhot (China). Key Lab. of Semiconductor Photovoltaic Technology of Inner Mongolia Autonomous Region. School of Physical Science and Technology
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Chinese Academy of Sciences (CAS), Beijing (China). Key Lab. for Renewable Energy. Beijing Key Lab. for New Energy Materials and Devices. Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences
Rechargeable sodium-ion batteries with earth abundant Fe/Mn based cathodes are promising choice for grid-scale applications. However, the important candidate, P2-type Fe based materials suffer from server voltage decay during battery operation, which is due to the Fe3+ migration to the neighboring tetrahedral sites. Two Fe based layered oxides Na0.7[Cu0.15Fe0.3Mn0.55]O2 and Na0.7[Cu0.2Fe0.2Mn0.6]O2 have been prepared. With the combination of in-situ XRD, X-ray PDF, hard and soft X-ray absorption, we demonstrate that the voltage decay in Fe based layered oxides comes from a dynamic origin. Dramatic phase transition can be triggered by higher upper voltage limit and partially irreversible Fe migration lead to voltage fade. With excess Cu doping into crystal lattice, Fe migration can be much mitigated and structural stability can therefore be maintained. Furthermore, Cu introduction brings about extra capacity via the correlation between transition metals elements and ligand oxygen, which may well compensate capacity loss from inert impurity doping. Finally, possible strategies for suppressing the detrimental voltage decay in battery cathodes can be proposed accordingly.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Technologies R&D Program (China); National Natural Science Foundation of China (NSFC); Beijing Municipal Science & Technology Commission (China)
- Grant/Contract Number:
- SC0012704; AC02-05CH11231; 2016YFB0901500; 51725206; 51421002; 51822211; Z181100004718008
- OSTI ID:
- 1476275
- Alternate ID(s):
- OSTI ID: 1767426
- Report Number(s):
- BNL-209143-2018-JAAM; BNL-221091-2021-JAAM
- Journal Information:
- Journal of Materials Chemistry. A, Vol. 6, Issue 42; ISSN 2050-7488
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Understanding Challenges of Cathode Materials for Sodium‐Ion Batteries using Synchrotron‐Based X‐Ray Absorption Spectroscopy
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journal | July 2019 |
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