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Updated: Jun 24, 2025

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低,低层氧化物阴极的电解质启用高压操作,用于高能量密度离子电池

Michael Yi¹, Richard Sim¹, Arumugam Manthiram¹

¹McKetta Department of Chemical Engineering & Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.

Small (Weinheim an der Bergstrasse, Germany)

|June 7, 2024

概括

研究人员开发了一种局部高度电解质 (LHCE),以使低,低的离子电池能够长期循环. 这种先进的电解质可以提高电动汽车的能量密度和电池寿命.

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:

高成本金属如和在离子电池中至关重要,但面临供应链问题.
减少这些金属降低了能量密度,影响了电动汽车的续航里程.
高压循环增加了能量密度,但导致了显著的细胞降解.

研究的目的:

为了使低,低层氧化物阴极在高电压下能够长期循环.
调查局部高度电解质 (LHCE) 的使用,以提高电池性能.
为了证明高能量密度,长寿命的离子电池的成本有效解决方案.

主要方法:

使用一个局部高度电解质 (LHCE) 与一个LiNi$_{0.60}$Mn$_{0.31}$Co$_{0.07}$Al$_{0.02}$O$_{2}$ (NMCA) 阴极.
测试的NMCA全细胞与石墨或石墨阳极在4.5V.
与基线碳酸盐电解质的性能进行比较.

主要成果:

使用LHCE的NMCA细胞在400个循环后实现了73%的容量保留,显著超过了基线电解质的49%的保留.
LHCE促进了阻抗增长的减少,活性物质的损失和气体的演变.
由于LHCE中有利的盐分解,在阴极和阳极表面形成了坚固的,富含无机物之间的相间层.

结论:

局部高度电解质 (LHCE) 有效地使低,低阴极的稳定高压循环.
LHCE促进了保护性介相层的形成,提高了电池的寿命和性能.
这种方法为具有成本效益,高能量密度和长寿命的离子电池提供了途径.

关键词:

电化学电化学电化学电解质的电解质是一种电解质.高压运行高压运行.离子电池的离子电池低阴极是低的阴极.

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