具有精确调节比率的新型超稳定2D SbBi合金结构使得长期稳定的/离子储存成为可能
Xi Liu1, Xinying Wang1, Yiru Zhou1
1Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.
Advanced materials (Deerfield Beach, Fla.)
|December 13, 2023
概括
研究人员开发了用于可充电电池的新型二维- (SbBi) 合金. 2D-Sb0.6Bi0.4阳极在离子和离子电池中显示出极好的容量和稳定性.
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
- 纳米技术纳米技术
背景情况:
- 二维 (2D) (Sb) 和 (Bi) 对高性能离子电池 (PIB) 和离子电池 (LIB) 的循环稳定性和容量有局限性.
- 开发将Sb的高容量与Bi的稳定性相结合的二元合金对于先进的能量存储至关重要.
研究的目的:
- 制造具有可调节原子比的新型二维二元SbBi合金.
- 评估这些合金在PIB和LIB中作为阳极的电化学性能.
- 阐明存储机制和性能增强的起源.
主要方法:
- 合成二维SbBi合金的一步共同替代方法.
- 在PIB和LIB中进行电化学测试 (循环稳定性,容量保持).
- 动力分析,in-situ/ex-situ表征和理论计算用于研究储存机制.
主要成果:
- 成功制造了一系列2D SbBi合金.
- 在PIBs中,2D-Sb0.6Bi0.4阳极表现出高容量 (381.1mAhg-1经过500个周期在0.2Ag-1以87.8%的保留) 和超长周期稳定性 (1000个周期在1.0Ag-1以每周期0.037%的衰变).
- 在LIBs中也观察到优异的表现,这归因于结构稳定和协同效应.
结论:
- 2D-Sb0.6Bi0.4合金为高性能PIB和LIB提供了一个有前途的阳极材料.
- 2D二元合金结构中的协同作用减轻了体积膨胀,增强了离子扩散.
- 这项工作提出了一个可扩展的策略,用于设计可充电电池的二维二元/三元合金.
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