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Journal articles
Complementary Ion Beam Analysis and Raman Studies for Investigation of the Carbon Coating Impact on Li Insertion/Deinsertion Process at LiFePO$_4$/C Electrodes
Abstract : Electrode materials were prepared using two commercial C-LiFePO$_4$ powders (called hereafter LFP-A and LFP-B). The nature and the thickness of carbon coating have been characterized by Raman spectroscopy and Transmission Electron Microscopy. The carbon coating of the LFP-B is more graphitized than LFP-A, which appears amorphous. The lithium distribution of these electrodes is investigated using ion beam techniques as a function of its state of charge (SOC). The nuclear microanalyses reveal the presence of different dopings in the active materials (Ti or V). A layer richer in carbon (in addition to the composite electrode) is systematically observed on LFP-A pristine and cycled electrodes. In both materials, immobilization of lithium is visible. Higher content of lithium was observed for the LFP-B electrode.
Cited literature [31 references]
https://hal-cea.archives-ouvertes.fr/cea-01636441
Contributor : Serge Palacin Connect in order to contact the contributor
Submitted on : Thursday, November 16, 2017 - 3:54:49 PM
Last modification on : Tuesday, October 12, 2021 - 5:20:46 PM
Long-term archiving on: : Saturday, February 17, 2018 - 2:05:09 PM
Contributor : Serge Palacin Connect in order to contact the contributor
Submitted on : Thursday, November 16, 2017 - 3:54:49 PM
Last modification on : Tuesday, October 12, 2021 - 5:20:46 PM
Long-term archiving on: : Saturday, February 17, 2018 - 2:05:09 PM
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