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Title: Suppressing the Voltage Decay of Low-Cost P2-Type Iron Based Cathode Materials for Sodium-ion Batteries

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/C8TA07933A· OSTI ID:1476275
 [1];  [2];  [3];  [4];  [4];  [4];  [3];  [4];  [4];  [4];  [2];  [3];  [4];  [4]
  1. 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
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. 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
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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 Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office; 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
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (1)

Understanding Challenges of Cathode Materials for Sodium‐Ion Batteries using Synchrotron‐Based X‐Ray Absorption Spectroscopy journal July 2019

Figures / Tables (6)

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Figure 2(p. 11)figure Figure 2
Figure 3(p. 12)figure Figure 3
Figure 4(p. 13)figure Figure 4
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Figure 6(p. 15)figure Figure 6

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