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一个有孔的Li-Al合金阳极,用于高性能硫化物基全固态电池

Jinhui Zhu¹, Jiayao Luo^1,2, Jingyan Li^1,2

¹The Soft2D Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.

Advanced materials (Deerfield Beach, Fla.)

|August 12, 2024

概括

一种新的多孔- (Li-Al) 合金阳极通过适应体积变化和形成稳定的接口来增强全固态电池 (ASSLB). 这一突破为固态电池提供了卓越的性能.

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/合金阳极与硫化物固体电解质 (SSEs) 的兼容性比固态电池 (ASSLB) 的阳极更好.
开发稳定和高性能阳极对于实际的ASSLB至关重要.

研究的目的:

为基于SSE的ASSLB设计和制造一个多孔- (Li-Al) 合金阳极 (LiAl-p).
为了研究LiAl-p阳极的电化学性能和接口特性.

主要方法:

使用机械压力制造多孔Li-Al合金阳极.
阳极结构和表面特性 (例如,多孔性,氧物种) 的表征.
电化学测试LiAl-p对称和全细胞 (例如,临界电流密度,循环稳定性,面积容量).

主要成果:

LiAl-p 阳极具有多孔结构,表面有丰富的氧物种.
LiAl-p对称电池实现了创纪录的临界电流密度6.0 mA cm-2和5000小时循环.
LiAl-p蓄电池LiNi0.8Co0.1Mn0.1O2全电池提供11.9 mAh的cm−2面积容量和1800个循环.
孔隙结构适应体积变化,形成一个稳定的无机丰富的固体电解质介相 (SEI).

结论:

多孔的Li-Al合金阳极在基于SSE的ASSLB中表现出卓越的室温性能.
独特的架构和表面化学促进体积变化适应和稳定的SEI形成.
本研究提供了固态电池中高性能合金阳极的设计策略.

关键词:

LiAl合金阳极是一种合金.所有固态电池都是固态电池.孔隙结构是多孔结构.固体电解质相间阶段硫化物固体电解质硫化物固体电解质

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