Electrochemical Performance of Modified LiMn2O4 Used as Cathode Material for an Aqueous Rechargeable Lithium Battery

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• 作者：Mingshu Zhao ; Bao Zhang ; Guanliang Huang ; Weimin Dai ; Fei Wang ; Xiaoping Song
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：February 16, 2012
• 年：2012
• 卷：26
• 期：2
• 页码：1214-1219
• 全文大小：970K
• 年卷期：v.26,no.2(February 16, 2012)
• ISSN：1520-5029

文摘

To improve the electrochemical performance of cathode material in aqueous LiNO₃ solution, modified spinel LiMn₂O₄ materials prepared with different amounts of sucrose additive are synthesized using a two-step sintering method. The phase structure and morphologies of as-prepared samples are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Electrochemical performances of modified LiMn₂O₄ used as the cathode material of the aqueous rechargeable lithium battery (ARLB) are investigated by galvanostatic charge/discharge testing. The effects of the carbon, which decomposed from the additive sucrose, on the electrochemical performances of the modified spinel LiMn₂O₄ cathode for the ARLBs are discussed. In comparison to pristine LiMn₂O₄, the optimum quantity of sucrose addition improves the electrochemical performance of spinel LiMn₂O₄ material in an aqueous LiNO₃ solution, especially for the addition of 20 wt % sucrose, and its initial discharge specific capacity is 118.3 mAh g^鈥?; moreover, it still has 102.8 mAh g^鈥? after 40 cycles.