物理化学学报 >> 2014, Vol. 30 >> Issue (10): 1787-1793.doi: 10.3866/PKU.WHXB201408052

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对苯二甲酸镁作为钠离子电池的有机负极材料

黄宗令, 王丽平, 牟成旭, 李晶泽   

  1. 电子科技大学微电子与固体电子学院, 电子薄膜与集成器件国家重点实验室, 成都 610054
  • 收稿日期:2014-07-08 修回日期:2014-08-05 发布日期:2014-09-30
  • 通讯作者: 王丽平, 李晶泽 E-mail:lijingze@uestc.edu.cn;lipingwang@uestc.edu.cn
  • 基金资助:

    国家自然科学基金(21073029,51033006,51102039,51211140045,21473022)和中央高校基本科研基金(ZYGX2012Z003)资助项目

Magnesium Terephthalate as an Organic Anode Material for Sodium Ion Batteries

HUANG Zong-Ling, WANG Li-Ping, MOU Cheng-Xu, LI Jing-Ze   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China
  • Received:2014-07-08 Revised:2014-08-05 Published:2014-09-30
  • Contact: WANG Li-Ping, LI Jing-Ze E-mail:lijingze@uestc.edu.cn;lipingwang@uestc.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21073029, 51033006, 51102039, 51211140045, 21473022) and Fundamental Research Funds for the Central Universities, China (ZYGX2012Z003).

摘要:

报道了对苯二甲酸镁作为钠离子电池负极材料的研究. 以对苯二甲酸和氢氧化镁为原料,采用酸碱中和反应制备了含结晶水的对苯二甲酸镁(MgC8H4O4·2H2O),该材料对钠离子电池表现出了较好的电化学活性、优异的倍率性能以及良好的循环稳定性. 在0.5C(1C=300 mA·g-1)倍率下循环50 周以后,可逆容量由114mAh·g-1降至95 mAh·g-1,容量保持率高达83%;在2C的倍率下有高达90 mAh·g-1的可逆比容量. 另外,在氮气气氛中,400 ℃进行后续热处理得到了不含结晶水的对苯二甲酸镁(MgC8H4O4),探讨了结晶水对其电化学性能的影响. 结果表明,MgC8H4O4·2H2O的比容量、倍率性能以及循环稳定性都明显优于不含结晶水的对苯二甲酸镁.

关键词: 对苯二甲酸镁, 有机电极材料, 钠离子电池, 结晶水, 中和反应

Abstract:

In this study, the electrochemical properties of magnesium terephthalate with hydration water (MgC8H4O4·2H2O) as an anode material for sodium ion batteries were investigated for the first time. MgC8H4O4· 2H2O was synthesized via a facile neutralization method using terephthalic acid (C8H6O4) and magnesium hydroxide (Mg(OH)2) as precursors. Good cycle performance was obtained as 114 mAh·g-1 was found for the second cycle and 95 mAh·g-1 was obtained after 50 cycles at a current rate of 0.5C (1C=300 mA·g-1), giving a capacity retention of 84%. At a current rate of 2C, it presents a discharge capacity of 90 mAh·g-1. After heating under a nitrogen atmosphere at 400 ℃, anhydrous magnesium terephthalate (MgC8H4O4) was obtained. The effect of hydration water on the crystal structure, morphology, and electrochemical properties was investigated. The results indicate that the specific discharge capacity, rate capacity, and cyclic performance of MgC8H4O4· 2H2O are better than those of MgC8H4O4.

Key words: Magnesium terephthalate, Organic electrode material, Sodium ion battery, Hydration water, Neutralization reaction

MSC2000: 

  • O646