TY  - JOUR
AU  - He, Xin
AU  - Wang, Rui
AU  - Stan, Marian Cristian
AU  - Paillard, Elie
AU  - Wang, Jun
AU  - Frielinghaus, Henrich
AU  - Li, Jie
TI  - In Situ Investigations on the Structural and Morphological Changes of Metal Phosphides as Anode Materials in Lithium-Ion Batteries
JO  - Advanced materials interfaces
VL  - 4
IS  - 7
SN  - 2196-7350
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2017-03053
SP  - 1601047 -
PY  - 2017
AB  - 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 is utilized to investigate and compare the morphological changes of copper phosphide and tin phosphide during the initial cycle. By coupling with scanning electron microscopy investigation, the surface activities of the electrodes at different electrochemical states, including the solid electrolyte interphase formation, swelling and recovering, cracks appearance, and stripping at nanoscale of the material particles are evaluated. With in situ X-ray diffraction measurement,the energy storage mechanism is further explained. This work demonstrates useful techniques to analyze the detailed fatigue mechanisms of the activematerial, and provides new insights of the nanostructural changes of anode materials reacting with lithium via conversion and alloying.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000399037600005
DO  - DOI:10.1002/admi.201601047
UR  - https://juser.fz-juelich.de/record/829334
ER  -