| 微米尺寸二硫化钼层间化合物的电化学制备及其储镁性能 | |
| Electrochemical Preparation of MoS2 Intercalated Compound with Micron Size for Magnesium-Ion Storage | |
| 摘要: 采用一种简便的电化学方法制备了有机阳离子（1-丁基-3-甲基咪唑阳离子，BMIM+）插层的微米尺寸MoS2层间化合物，并将其用作镁离子电池正极材料。所制备的MoS2层间化合物（MoS2-BMIM+）具有扩大的层间距（0.98 nm），能有效降低Mg2+的嵌入/脱出势垒，为存储Mg2+提供了更多的活性位点，从而表现出显著提高的充电比容量和良好的倍率性能。MoS2-BMIM+在20 mA· g-1电流密度下的充电比容量可达101.93 mAh·g-1（约4倍于初始体相MoS2）。我们进一步证明了这一方法同样适用于插层1-丁基-1-甲基吡咯烷双阳离子（Pyr14+），所得化合物的层间距为1.04 nm。 | |
| 关键词: 镁离子电池 正极材料 二硫化钼 电化学插层 层间距 | |
| 基金项目: 国家自然科学基金（No.21938005，21905206）资助项目。 | |
| Abstract: The micro-sized MoS2 intercalated compound with the intercalant of 1-butyl-3-methyl-imidazolium cation (BMIM+) was prepared by a simple electrochemical method and used as cathode material of magnesium ion batteries. The MoS2 intercalated compound (denoted as MoS2-BMIM+) has an expanded interlayer spacing of 0.98 nm, which effectively reduced the insertion/extraction barrier of Mg2+ and provided abundant active sites for Mg2+ intercalation. Therefore, the MoS2-BMIM+ deliverd a significantly improved charging capacity (101.93 mAh·g-1 at 20 mA· g-1, about 4 times as much as bulk MoS2) and a good rate performance. We further show that this method can also be applied for the intercalation of 1-butyl-1-methylpyrrolidinium cation (Pyr14+), which showed an interlayer spacing of 1.04 nm. | |
| Keywords: magnesium ion battery cathode material molybdenum disulfide electrochemical intercalation interlayer spacing | |
| 投稿时间：2020-04-15 修订日期：2020-05-28 | |
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| 李金金,刘聪聪,郭敏,李时莹,吴子辰,赵晓莉,杨晓伟.微米尺寸二硫化钼层间化合物的电化学制备及其储镁性能[J].无机化学学报,2020,36(8):1543-1549. | |
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