期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 20, 页码 18368-18376出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b01761
关键词
PVdF; PEO; XPS; XPS imaging; LFP; NMC
资金
- Bpifrance Financement
- ANR program [ANR-15-CE05-0001-01]
The lithium and lithium-ion battery electrode chemical stability in the pristine state has rarely been considered as a function of the binder choice and the electrode processing. In this work, X-ray photoelectron spectroscopy (XPS) and XPS imaging analyses associated with complementary Mossbauer spectroscopy are used in order to study the chemical stability of two pristine positive electrodes: (i) an extruded LiFePO4-based electrode formulated with different polymer matrices [polyethylene oxide and a polyvinylidene difluoride (PVdF)] and processed at different temperatures (90 and 130 degrees C, respectively) and (ii) a Li[Ni0.5Mn0.3Co0.2]O-2 (NMC)-based electrode processed by tape-casting, followed by a mild or heavy calendering treatment. These analyses have allowed the identification of reactivity mechanisms at the interface of the active material and the polymer in the case of PVdF-based electrodes.
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