Two-Dimensional Iron Phosphorus Trisulfide as a High-Capacity Cathode for Lithium Primary Battery

Metal phosphorus trichalcogenide (MPX ) materials have aroused substantial curiosity in the evolution of electrochemical storage devices due to their environment-friendliness and advantageous X-P synergic effects. The interesting intercalation properties generated due to the presence of wide van der...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2023-01, Vol.28 (2), p.537
Main Authors: Lenus, Syama, Thakur, Pallavi, Samantaray, Sai Smruti, Narayanan, Tharangattu N, Dai, Zhengfei
Format: Article
Language:English
Subjects:
Batteries
cathode electrolyte interface
Cathodes
Crystal structure
discharge mechanism
Electrochemistry
Electrodes
Energy
Iron
Lithium
Lithium batteries
lithium primary battery
Low temperature
metal phosphorus trichalcogenides
Morphology
Perfluorocarbons
Phosphorus
Photoelectron spectroscopy
Photoelectrons
Primary batteries
Scanning electron microscopy
Specific capacity
Spectrum analysis
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Summary:Metal phosphorus trichalcogenide (MPX ) materials have aroused substantial curiosity in the evolution of electrochemical storage devices due to their environment-friendliness and advantageous X-P synergic effects. The interesting intercalation properties generated due to the presence of wide van der Waals gaps along with high theoretical specific capacity pose MPX as a potential host electrode in lithium batteries. Herein, we synthesized two-dimensional iron thio-phosphate (FePS ) nanoflakes via a salt-template synthesis method, using low-temperature time synthesis conditions in single step. The electrochemical application of FePS has been explored through the construction of a high-capacity lithium primary battery (LPB) coin cell with FePS nanoflakes as the cathode. The galvanostatic discharge studies on the assembled LPB exhibit a high specific capacity of ~1791 mAh g and high energy density of ~2500 Wh Kg along with a power density of ~5226 W Kg , some of the highest reported values, indicating FePS 's potential in low-cost primary batteries. A mechanistic insight into the observed three-staged discharge mechanism of the FePS -based primary cell resulting in the high capacity is provided, and the findings are supported via post-mortem analyses at the electrode scale, using both electrochemical- as well as photoelectron spectroscopy-based studies.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28020537