用碳涂层的/石墨氧化物复合材料作为高度稳定的离子电池的阳极材料
Lujie Niu1, Rui Zhang2, Qiang Zhang1
1School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, China.
Physical chemistry chemical physics : PCCP
|June 11, 2024
概括
离子电池 (LIB) 的阳极材料使用减少的石墨烯氧化物和无形碳的协同覆盖层进行了改进. 这种Si/G/C复合物增强了结构完整性和电化学性能,以获得更好的LIB.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 阳极为离子电池 (LIB) 提供了高的理论容量.
- 体积膨胀和低导电性阻碍了在LIBs中的实际应用.
- 需要新的复合结构来克服的局限性.
研究的目的:
- 开发一种新的/减少的氧化石墨烯/无形碳 (Si/G/C) 阳极材料.
- 为了研究一个覆盖层的协同效应,以提高LIB性能.
- 提高阳极的结构完整性和电化学性能.
主要方法:
- 使用氨的纳米粒子 (Si NPs) 的表面修饰.
- 用石墨烯氧化物和无形碳涂覆Si NPs,形成一个协同的覆盖层.
- 三元Si/G/C复合阳极材料的制造.
- 电化学测试,包括循环稳定性和速率性能.
主要成果:
- 与二元复合材料相比,三元Si/G/C复合材料显示出更高的结构完整性.
- Si/G/C 阳极表现出极好的循环稳定性和速度性能.
- 在1Ag-1时,Si/G/C复合材料在267个周期中保持了70%的容量 (每周期减少0.0711%的容量).
结论:
- 协同覆盖层有效地减轻了体积膨胀,并提高了阳极的导电性.
- 开发的Si/G/C复合材料是高性能离子电池的有希望的阳极材料.
- 这种方法为改进基于的阳极材料提供了一个可行的策略.
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