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| Home > Publications database > Morphological Changes of Metal Phosphides as Anode Materials in Lithium-Ion Batteries |
| Home > Publications database > Morphological Changes of Metal Phosphides as Anode Materials in Lithium-Ion Batteries |
| Conference Presentation (Other) | FZJ-2017-00273 |
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2016
Abstract: The binary metal phosphides (M-P, M= Cu, Fe, Sn, Sb) compounds are of great interest as negative electrode materials for high energy density lithium-ion batteries. However, the morphology and structural changes at the nanoscale upon electrochemical (de)lithiation are not clear yet, which require further detailed investigation. In-situ neutron scattering technique was utilized to investigate and compare the morphological changes of copper phosphide and tin phosphide during the initial cycle. By coupling with SEM investigation, the surface activities of the electrodes at different electrochemical state, including the SEI formation, swelling and recovering, cracks appearance and stripping at nanoscale of the material particles are evaluated. With in-situ XRD measurement, the energy storage mechanism was further explained. This work demonstrates useful techniques to analyze the detailed fatigue mechanisms of the active material, and provides new insights of the nanostructural changes of anode materials reacting with lithium via conversion and alloying.
Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Energy (1st) ; Soft Condensed Matter (2nd) ; Materials Science (2nd)
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