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- W2278447701 abstract "Introduction Silicate cathode materials for lithium-ion batteries have recently attracted much interest for their intrinsic stability and natural abundance 2 .Li2MnSiO4 has been reported as an electrochemically active cathode material, and even more than one electron exchange could be yield . It is a pity that all these work showed that Li2MnSiO4 is a cathode material with poor cycling stability. For the further work to improve the cycling stability, we should understand the fading mechanism for the Li2MnSiO4 cathode material. In this work, we will investigate the possible fading mechanism based on the ex-situ XRD and FTIR experiments on the cycling process of the Li2MnSiO4 cathode material. Experiments To get the electrochemically activity of Li2MnSiO4, the cathode material was prepared as a Li2MnSiO4/carbon composite material , and the capacity here was calculated based on the mass of the composite material. The IR spectra were measured on a Nicolet Avatar 360 FTIR instrument by a transmission mode (Thermoelectro. USA). Cathodes were fabricated by mixing the materials with 10% acetyeneblack and 10% PVDF (Polyvinylidene Fluoride) binder, and pasted on aluminum current collector. Electrochemical performance of the cathode was evaluated at room temperature by coin-type cells using a non-aqueous electrolyte (1M LiPF6/EC-DMC 1:1 wt%) with Li foils as the anodes. Results and discussion Figure 1 shows the electrochemical performance of the Li2MnSiO4 cathode material. When cycled between 1.5 ~4.8 V with a current density of 30 mAg, it gave an initial discharge capacity of about 160 mAhg. And this capacity faded rapidly during the cycling process. On the 40th cycle, only a discharge capacity about 60 mAhg could be yield. It showed a poor cycling performance of the Li2MnSiO4 cathode material." @default.
- W2278447701 created "2016-06-24" @default.
- W2278447701 date "2008-01-01" @default.
- W2278447701 modified "2023-09-26" @default.
- W2278447701 title "Fading MEchanism of Li2MnSiO4 as Cathode Material in Lithium Ion Batteries" @default.
- W2278447701 doi "https://doi.org/10.1149/ma2008-02/7/597" @default.
- W2278447701 hasPublicationYear "2008" @default.
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