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- W1467231731 abstract "Lithium manganese oxide spinel (LiMn2O4) batteries show catastrophic capacities fading after extended storage and being work at 55 °C. In view of electrolyte, the performance deterioration of LiMn2O4 cathode mainly origins from acidic impurity HF from the decomposition of LiPF6 salt in the presence of trace water at 55 °C, which is believed to accelerate electrolyte decomposition. For that reason, the effect of p-toluenesulfonyl isocyanate (PTSI) as electrolyte additive on the stability of the electrolyte and cycling performance of LiMn2O4/Li cell at 55 °C was studied. To verify that PTSI suppress Mn3+ dissolution mechanism of LiMn2O4 cathode, diethyl carbonate (DEC)-based electrolyte using PTSI is newly evaluated as novel film-forming electrolyte additive. Comparative analysis of the electrolyte with and without PTSI by linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), inductively coupled plasma-atomic emission spectrometry (ICP-AES), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Based on these results, PTSI can be used as effective electrolyte additive for formation of a good solid electrolyte interphase (SEI) layer on the LiMn2O4 electrode. The capacity fading of LiMn2O4/Li cells after extended storage and being work at 55 °C were obviously inhibited, which is mainly originated from the suppression of carbonate solvents electrolyte decomposition and the enhancement of SEI conductivity." @default.
- W1467231731 created "2016-06-24" @default.
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- W1467231731 date "2015-10-01" @default.
- W1467231731 modified "2023-10-17" @default.
- W1467231731 title "Electrochemical analysis for cycle performance and capacity fading of lithium manganese oxide spinel cathode at elevated temperature using p-toluenesulfonyl isocyanate as electrolyte additive" @default.
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- W1467231731 doi "https://doi.org/10.1016/j.electacta.2015.09.019" @default.
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