在3D复合材料的2D异构接口上进行Ti─O─C结合,以在高质量负载水平下快速储存离子
Diwen Yu1, Kaixuan Guo1, Fengxiao Hou1
1School of Energy and Power Engineering, North University of China, Taiyuan, 030051, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 18, 2024
概括
使用新型Ti─O─C结合的3D复合电极增强了离子的扩散和吸附. 这一突破使离子电池 (SIB) 的高质量负载成为可能,其性能与离子电池相当.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 计算化学的计算化学
背景情况:
- 3D复合电极显示了离子电池 (SIB) 中高质量负载的潜力.
- 在SIB中,低速率性能通常与复合异构接口中缓慢的离子动力学有关.
研究的目的:
- 开发一个3D复合电极,在异质接口上增强离子 (Na+) 动力学.
- 调查接口粘合在提高高质量负载SIB电极性能方面的作用.
主要方法:
- 制造一个3D的MXene减少孔石墨烯氧化物 (MXene-RHGO) 复合材料.
- 密度函数理论 (DFT) 计算用于分析界面粘合和电场.
- 用于离子储存的复合电极的电化学测试.
主要成果:
- 在MXene-RHGO复合材料中形成桥接接口Ti─O─C粘合.
- 由于Ti─O─C的结合,DFT揭示了增强的内置电场 (BIEF),加速了Na+的扩散和迁移.
- 高质量负载 (10 mg cm-2) 3D MXene-RHGO 电极在 10 mA cm-2 时实现了 3 mAh cm-2 的稳定面积容量.
结论:
- 合理设计的接口粘合,特别是Ti─O─C,有效地促进3D复合电极中的快速Na+存储.
- 开发的MXene-RHGO复合材料在实际SIB应用中证明了高质量负载电极的可行策略.
- 实现的性能指标与商业离子电池具有竞争力,并且优于现有的SIB材料.
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