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雙碳源制備磷酸釩鋰及其電化學性能研究
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三峽大學機械與動力學院,三峽大學材料與化工學院,三峽大學材料與化工學院,三峽大學材料與化工學院,中國科學院能量轉換材料重點實驗室，上海硅酸鹽研究所

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TM912.9

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國家自然科學基金項目(51302153、51272128);中國科學院能量轉換材料重點實驗室開放課題基金（CKEM131404）; 湖北省教育廳重點項目（D20131303）和三峽大學人才科研啟動基金項目(KJ2012B043)


Preparation and Electrochemical Performance of Lithium Vanadium Phosphate with Double Carbon Sources
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College of Materials and Chemical Engineering, China Three Gorges University,College of Materials and Chemical Engineering, China Three Gorges University,College of Materials and Chemical Engineering, China Three Gorges University,CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics,

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    摘要:

    以葡萄糖為主碳源，抗壞血酸(AA)為輔助碳源，采用固相法合成了倍率性能優(yōu)良的碳包覆磷酸釩鋰(LVP/C-AA)復合正極材料。通過X射線衍射(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)、拉曼光譜(Raman)、恒電流充放電測試、循環(huán)伏安(CV)和交流阻抗(EIS)測試表征了材料的物相、形貌、結構和電化學性能。結果表明，添加少量的抗壞血酸為輔助碳源，對Li3V2(PO4)3晶體結構沒有明顯的影響，但能明顯提高Li3V2(PO4)的高倍率性能。LVP/C-AA在5 C時的首次放電比容量可達162.4 mAh g-1，100次循環(huán)后容量保持率高達80.4%。

    Abstract:

    Using glucose as main carbon source and ascorbic acid (AA) as accessory carbon source, carbon coated lithium vanadium phosphate (LVP/C-AA) with high-rate performance was successfully synthesized by a solid-state reaction. The phases, morphologies, structures and electrochemical performance of samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), charging and discharging measurements, cyclic voltammogram (CV) testing and electrochemical impedance spectra (EIS). The results show that using ascorbic acid as accessory carbon source has no effect on the crystal structure of Li3V2(PO4)3, but enhances the high-rate performance. The LVP/C-AA electrode delivers an initial capacity as high as 162.4 mAh g-1 at 5 C, and shows an excellent capacity retention ration of 80.4% even after 100 cycles.

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孫華斌,楊學林,張露露,李明,溫兆銀.雙碳源制備磷酸釩鋰及其電化學性能研究[J].稀有金屬材料與工程,2016,45(11):3023~3029.[Sun Huabin, Yang Xuelin, Zhang Lulu, Li Ming, Wen Zhaoyin. Preparation and Electrochemical Performance of Lithium Vanadium Phosphate with Double Carbon Sources[J]. Rare Metal Materials and Engineering,2016,45(11):3023~3029.]
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  • 收稿日期:2014-08-22
  • 最后修改日期:2014-12-05
  • 錄用日期:2014-12-25
  • 在線發(fā)布日期: 2016-12-08
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