溶胶-凝胶法制备 ZnWO4负极材料及其电化学性能研究
采用柠檬酸溶胶-凝胶法制备了 ZnWO4材料，考察了焙烧温度对制备过程的影响.利用 TG/DSC 分析了 ZnWO4前驱体的分解过程；通过 XRD 和 SEM 研究了 ZnWO4材料的晶体结构组成和形貌；选择恒电流充放电、循环伏安及交流阻抗测试了该材料的电化学性能.结果表明：ZnWO4材料在550℃下晶体结构完整，综合电化学性能较好，首次放电比容量为446.29 mAh / g，循环20次可逆比容量为200.7 mAh / g，比容量衰减相对较慢，充放电效率也较高，循环性能较好....
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| Published in | 郑州轻工业学院学报（自然科学版） Vol. 30; no. 2; pp. 11 - 15 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
武夷学院 生态与资源工程学院,福建 武夷山,354300%郑州轻工业学院 河南省表界面科学重点实验室,河南 郑州,450001
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2095-476X |
| DOI | 10.3969/j.issn.2095-476X.2015.02.003 |
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| Summary: | 采用柠檬酸溶胶-凝胶法制备了 ZnWO4材料，考察了焙烧温度对制备过程的影响.利用 TG/DSC 分析了 ZnWO4前驱体的分解过程；通过 XRD 和 SEM 研究了 ZnWO4材料的晶体结构组成和形貌；选择恒电流充放电、循环伏安及交流阻抗测试了该材料的电化学性能.结果表明：ZnWO4材料在550℃下晶体结构完整，综合电化学性能较好，首次放电比容量为446.29 mAh / g，循环20次可逆比容量为200.7 mAh / g，比容量衰减相对较慢，充放电效率也较高，循环性能较好. |
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| Bibliography: | ZnWO4 materials were prepared by citrates sol-gel method. The effect of sintering temperature on preparation process of samples was studied. The thermo-decomposing process of the precursor was analyzed by TG/ DSC;the crystal structure and morphology of samples were characterized by XRD and SEM,and the electrochemical performance was tested by continuous current charge-discharge,cyclic voltammetry （CV）and electrochemical impedance spectroscopy（EIS）. The results showed that the materials prepared at 550 ℃ had well developed crystal structure and better electrochemical properties with the first discharge specific capacity of 446. 29 mAh / g and the reversible specific capacity of 200. 7 mAh / g after cycle 20 times,specific capacity decayed slowly,charge and discharge efficiency was also high,and it showed a good cycle performance. XIE Wen-ju, WANG Zhi-tao, ZHANG Lin-sen, JIN Kai, WU Fang-li, XIE Wen-ju, WANG Zhi-tao, ZHANG Lin-sen, JIN Kai, WU Fang-li （ 1. College of Ecology and Resources Engineering, Wuyi Unive |
| ISSN: | 2095-476X |
| DOI: | 10.3969/j.issn.2095-476X.2015.02.003 |