Li2MnSiO4/C Nanocomposite Prepared by Resorcinol-Formaldehyde Assisted Sol-Gel Method

doi:10.3724/SP.J.1077.2013.12445

Abstract

Abstract: Li₂MnSiO₄/C nanocomposite was prepared by a resorcinol-formaldehyde assisted Sol-Gel method. The crystalline structure, morphology and electrochemical performances of the products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and galvanostatic charge/discharge test. The results demonstrate that the as-prepared nanocomposite has a highly pure Pmn21 orthorhombic structure with uniformly distributed particle size of about 50 nm and exhibits good electrochemical performance. Li₂MnSiO₄/C cathode can deliver an initial discharge capacity of 105.7 mAh/g with 90.7% capacity retention over 50 charge-discharge cycles. It is also found that the crystalline structure of Li₂MnSiO₄ almost remains stable after charge-discharge cycling, indicating that the coated carbon layer formed by pyrolysis of resorcinol-formaldehyde can not only enhance the electronic conductivity, but also maintain the structural stability of the Li₂MnSiO₄/C nanocomposite.

Key words: Li₂MnSiO₄, resorcinol-formaldehyde, Sol-Gel method, cycling performance

CLC Number:

TQ174

LIU Shuang-Ke, XU Jing, LI De-Zhan, HU Yun, XIE Kai. Li₂MnSiO₄/C Nanocomposite Prepared by Resorcinol-Formaldehyde Assisted Sol-Gel Method[J]. Journal of Inorganic Materials, 2013, 28(06): 635-638.

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Li₂MnSiO₄/C Nanocomposite Prepared by Resorcinol-Formaldehyde Assisted Sol-Gel Method

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