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作为先进离子电池的阳极的相位结构调节的自承载-合金膜

Meijia Song¹, Kai Zheng², Tao Wei¹

¹School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, PR China.

|October 17, 2024

概括

研究人员开发了一种新的In-Bi合金阳极,用于离子电池 (MIB). 这种双相电极通过改善离子传输和适应体积变化来提高性能,提高电池效率.

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:

合金类型的阳极为离子电池 (MIB) 提供了高的理论容量.
关键的挑战包括缓慢的离子动力学和循环期间显著的体积变化.
开发稳定高效的阳极对于推进MIB技术至关重要.

研究的目的:

为MIBs设计一种自承载的In-Bi合金薄膜阳极.
为了提高合金类型阳极的电化学性能.
为了研究In-Bi系统中的储存机制.

主要方法:

使用磁铁喷射制造双相In-Bi/Bi薄膜的制造.
电化学测试,包括速度能力和循环性能评估.
操作X射线衍射以阐明 (去) 磁化机制.

主要成果:

与单相In和Bi相比,双相InBi/Bi电极表现出更高的速率和循环稳定性.
实现了303.1 mAh g^{-1 (550个周期在200 mA g^{-1) 和292.6 mAh g^{-1 (500个周期在2000 mA g^{-1) 的放电能力.}}}}
两相结构有效地管理了体积扩张,并促进了Mg2+运输.

结论:

通过双相InBi/Bi薄膜进行相位结构调制是改善MIB阳极性能的有效策略.
性能提升归因于双相配置和增加相位边界的协同效应.
操作XRD证实了 (去) 磁化机制,提供了对这种合金系统中Mg2+存储的基本见解.

关键词:

合金类型的阳极是合金类型的阳极.在 -Bi 薄膜中.离子电池离子电池的电池运行X射线衍射的操作.阶段结构调制的阶段结构调制.

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