化工进展 ›› 2017, Vol. 36 ›› Issue (01): 282-288.DOI: 10.16085/j.issn.1000-6613.2017.01.035

• 材料科学与技术 • 上一篇    下一篇

快离子导体隔膜的制备及在Cu-Zn可逆电池中的应用

周贻森, 梁姗姗, 杨超, 朱甜, 张汉平   

  1. 常州大学石油化工学院, 江苏 常州 213164
  • 收稿日期:2016-04-18 修回日期:2016-06-29 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: 张汉平,副研究员,研究内容化学电源、储能材料及器件、太阳能电池等。E-mail:jinhongshi0001@163.com。
  • 作者简介:周贻森(1990-),男,硕士研究生。
  • 基金资助:
    国家自然科学基金项目(51273027)。

Preparation of a fast ion conducting membrane for rechargeable Cu-Zn batteries

ZHOU Yisen, LIANG Shanshan, YANG Chao, ZHU Tian, ZHANG Hangping   

  1. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
  • Received:2016-04-18 Revised:2016-06-29 Online:2017-01-05 Published:2017-01-05

摘要: 具有NASICON结构的锂离子快离子导体Li1.3Al0.3Ti1.7(PO43可以通过压片烧结制备成快离子导体隔膜。以NH4H2PO4、Li2CO3、TiO2和Al2O3为原料,用固相法在900℃烧5h合成Li1.3Al0.3Ti1.7(PO43粉末,将其制备成锂离子快离子导体隔膜。研究了压力、烧结温度和厚度对Li1.3Al0.3Ti1.7(PO43快离子导体隔膜离子电导率的影响,并采用X射线衍射、扫描电子显微镜和交流阻抗技术对材料粉末以及烧结片相组成、结构和离子导电性进行表征和测试分析。隔膜的最优制备条件为压力10.0MPa,烧结温度900℃,厚度0.500mm。将快离子导体隔膜用于Cu-Zn电池模型中,将正负电解液分开,使Li+能够自由地穿过,而其他离子不能通过,从而组装了可进行反复充放电的铜锌模型电池。通过循环伏安测试证实Cu-Zn电池的可逆性,所得可充电Cu-Zn模型电池的电压范围为0.800~1.50V,进行100次循环后充电容量保持初始充电容量99%以上,具有长期循环稳定性。

关键词: 电化学, 膜, 电解质, Cu-Zn电池

Abstract: Lithium fast ion conductor Li1.3Al0.3Ti1.7(PO4)3 with NASICON structure is prepared by solid state reactions using NH4H2,Li2CO3,TiO2 and Al2O3 sintered at 900℃ for 5h. The powders are then pressed into tablets and calcined to prepare separators for conducting lithium ions. The effects of pressure, sintering temperature and the thickness on the ionic conductivities are studied. The phases and features of the membrane are investigated by X-ray diffraction and scanning electron microscope, respectively. The ionic conductivities are measured by AC impedance spectra. Optimal conditions referenced to fabricate the membrane are as follows:the pressure is 10.0MPa;the sintering temperature is 900℃ and the thickness is 0.500mm. The prepared membrane is employed to separate the cathode and the anode electrolytes apart,where lithium ions can freely pass through whereas other ions cannot. In this way we successfully assemble a rechargeable Cu-Zn battery. The working voltage of the resulting battery is 0.800-1.50V,and the charge capacity remains over 99% of its original capacity after 100 cycles,which shows a good cyclic stability.

Key words: electrochemistry, membranes, electrolytes, Cu-Zn battery

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