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- W2238169774 abstract "This study reports on the thorough investigation into the interaction between nanosized carbon-coated Li2MnSiO4 and various electrolytes, which has revealed significant changes of the active material after soaking in the electrolyte. Apart from the standard electrolyte salt lithium hexafluorophosphate (LiPF6), lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) and the F-free salt lithium bis-oxalatoborate (LiBOB) were used for soaking tests and compared in terms of corrosion power with Li2MnSiO4. Carbon-coated Li2MnSiO4 samples were obtained by solid-state synthesis and stored in contact with the electrolyte. The aged samples were fully characterized by means of several analytical techniques (XRD, XPS, SEM, ATR-FTIR). The results show that Li2MnSiO4 decomposes in LiPF6-based electrolyte at high temperatures, due to the formation of HF, which causes corrosion of the material and dissolution of Mn. No degradation was observed after soaking in the LiBOB-based electrolyte. The corrosion of the active material in standard electrolyte system, together with irreversible structural changes upon Li electrochemical extraction, are considered as the main reasons for the poor capacity retention upon cycling of the Li2MnSiO4-based cathode." @default.
- W2238169774 created "2016-06-24" @default.
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- W2238169774 date "2015-09-01" @default.
- W2238169774 modified "2023-10-06" @default.
- W2238169774 title "Study on the stability of Li2MnSiO4 cathode material in different electrolyte systems for Li-ion batteries" @default.
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- W2238169774 doi "https://doi.org/10.1016/j.electacta.2015.07.015" @default.
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