| 三维多孔碳负载氧化锡并协同氟化锂制备高性能锂离子阳极 |
| Three-Dimensional Porous Carbon Loading Tin Oxide and Cooperating with Lithium Fluoride to Prepare High Performance Lithium Ion Anode |
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| 摘要: 新型多孔碳纳米片/碳纳米管（PC/CNT）材料表现出丰富的分级孔隙结构，具有较高的氧化锡（SnO2）负载量。通过PC和CNT交联形成的三维结构能够有效地提高锂离子传输速率和电子的传导。此外，在电极中掺杂的氟化锂（LiF）不仅能够降低SnO2-PC/CNT-LiF电极的电荷转移电阻，而且还能补充SEI膜形成时消耗的Li+，降低不可逆容量，增强SEI膜的稳定性。研究表明，SnO2-PC/CNT-LiF电极在电流密度为100 mA·g-1时，首次可逆比容量达到1 642.98 mAh·g-1，活性物质的利用率高达90.12%，循环100次后，放电比容量仍然达到745.11 mAh·g-1，且库仑效率仍然保持在95.1%以上，显示出优异的倍率和循环性能。 |
| 关键词: 氧化锡 多孔碳纳米片 碳纳米管 氟化锂 |
| 基金项目: 江西省科技厅科研项目（No.20142BBE50071）和江西省教育厅（No.KJLD13006）资助。 |
| Abstract: New porous carbon nanosheets/carbon nanotubes (PC/CNT) materials showed a rich hierarchical pore structure with high tin oxide (SnO2) loading. The three-dimensional structure formed by the cross-linking of PC and CNT can improve Li+ transmission rate and electron conduction. In addition, lithium fluoride (LiF) doped in the electrode can not only reduce the charge transfer resistance of the SnO2-PC/CNT-LiF electrode, but also supplement the Li+ consumed during the formation of the SEI film, reduce the irreversible capacity and enhance the stability of the SEI film. The first reversible specific capacity of SnO2-PC/CNT-LiF electrode reached 1 642.98 mAh·g-1 at current density of 100 mA·g-1, and the utilization rate of active material was as high as 90.12%. After 100 cycles, the specific discharge capacity still reached above 745.11 mAh·g-1, and the coulombic efficiency remained above 95.1%, showing excellent rate and cycle performance. |
| Keywords: tin oxide porous carbon nanosheets carbon nanotubes lithium fluoride |
| 投稿时间：2020-09-16 修订日期：2021-01-07 |
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| 何强,孙晓刚,邹婧怡,李锐.三维多孔碳负载氧化锡并协同氟化锂制备高性能锂离子阳极[J].无机化学学报,2021,37(3):473-481. |
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