| 核壳结构MoOx/C微球的制备及储锂性能 |
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| 引用本文： | 白玉林,王澄,吴越,刘于斯,马超,蔡志鹏,王开学,陈接胜.核壳结构MoOx/C微球的制备及储锂性能[J].无机化学学报,2019,35(11):2045-2050. |
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| 作者姓名： | 白玉林 王澄 吴越 刘于斯 马超 蔡志鹏 王开学 陈接胜 |
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| 作者单位： | 上海交通大学化学化工学院, 上海 200240,上海交通大学化学化工学院, 上海 200240,中国石油大学(北京)克拉玛依校区工学院, 克拉玛依 834000,上海交通大学化学化工学院, 上海 200240,上海交通大学化学化工学院, 上海 200240,上海交通大学化学化工学院, 上海 200240,上海交通大学化学化工学院, 上海 200240,上海交通大学化学化工学院, 上海 200240 |
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| 基金项目： | 国家自然科学基金（No.21871177，21673140，720102002）资助项目 |
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| 摘 要： | 采用水热法合成了MoO_3/酚醛树脂前驱体,然后在空气中进行煅烧处理,成功制备了一种新型核壳MoOx/C微球。对材料的晶体结构、形貌和元素价态进行分析表明,该材料的主要成分是单斜相MoO_2、正交晶系MoO_3和碳。树脂在空气中的煅烧碳化将MoO_3/酚醛树脂前驱体中的六方晶系的MoO_3还原为单斜相MoO_2。其中少量的MoO_2会在空气中重新被氧化成正交晶系的MoO_3,形成了MoO_2/MoO_3异质结构。在这一系列反应的综合作用下,形成这种表面有裂纹的核壳MoOx/C微球复合材料。将该材料用作锂离子电池负极材料,表现出了循环稳定性高、倍率性能好等优异的电化学性能。在100 mA·g-1的电流密度下充放电循环100次之后,可逆容量达640.6 mAh·g-1。
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| 关 键 词： | 锂离子电池 二氧化钼 三氧化钼 电化学性能 |
| 收稿时间： | 2019/7/10 0:00:00 |
| 修稿时间： | 2019/9/11 0:00:00 |
Preparation and Performance for Lithium Storage of Core-Shell-Structured MoOx/C Microspheres |
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| BAI Yu-Lin,WANG Cheng,WU Yue,LIU Yu-Si,MA Chao,CAI Zhi-Peng,WANG Kai-Xue and CHEN Jie-Sheng.Preparation and Performance for Lithium Storage of Core-Shell-Structured MoOx/C Microspheres[J].Chinese Journal of Inorganic Chemistry,2019,35(11):2045-2050. |
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| Authors: | BAI Yu-Lin WANG Cheng WU Yue LIU Yu-Si MA Chao CAI Zhi-Peng WANG Kai-Xue and CHEN Jie-Sheng |
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| Institution: | School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,Faculty of Engineering, China University of Petroleum-Beijing at Karamay, Karamay, Xinjiang 834000, China,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | Core-shell-structured MoOx/C microspheres were prepared through the calcination of a MoO3/resin precursor obtained by a hydrothermal method. Upon calcination, carbonized resin reduced hexagonal MoO3 into monoclinic MoO2. A small amount of monoclinic MoO2 was further oxidized to orthorhombic MoO3, forming core-shell MoOx/C microspheres. The hierarchical MoOx/C microspheres showed excellent electrochemical lithium storage performance when used as an anode material for lithium-ion batteries. High reversible capacities of 640.6 mAh· g-1 was maintained at 100 mA·g-1 after 100 cycles, demonstrating the high reversible capacity and excellent cycle performance of the MoOx/C microspheres for lithium storage. |
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| Keywords: | lithium ion battery MoO2 MoO3 electrochemical performance |
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