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Tailoring Composite Microstructure Through Milling for Dry-Processed Sulfide-Based Solid-State Battery Cathodes

delete2025-09-05
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F
Finn Frankenberg *
C
Carina Amata Heck
M
Maximilian Kissel
M
Martin Lange
V
Vasiliki Faka
A
Alexander C. Diener
P
Philipp Haase
P
Peter Michalowski
W
Wolfgang G. Zeier
J
Jürgen Janek
A
Arno Kwade
DOI:10.1002/smll.202507279delete
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摘要

摘要

En 中文
虽然新型固态电解质和正极复合材料在固态电池中的应用效果正受到广泛研究,但关于机械加工对这些复合材料性能的影响却知之甚少。本研究系统地考察了行星球磨工艺中机械加工参数对Li6PS5Cl和LiNi0.83Co0.11Mn0.06O2复合正极制备的影响。结果表明,球磨过程通过影响固态电解质颗粒尺寸及电解质-活性物质团聚体的形成,对复合材料的微观结构产生显著影响。实验结果与离散元模拟相结合表明,随着能量输入的增加,微观结构的变化导致异质接触密度增大,从而提升了电化学性能。然而,若能量输入过高,Li6PS5Cl的晶粒尺寸减小以及LiNi0.83Co0.11Mn0.06O2中的应变增加会对电化学性能产生负面影响。后续对预球磨复合材料的干膜制备表明,非优化的复合材料可通过干膜制备过程中产生的高剪切应力得到部分补偿。总体而言,本研究证实了精确控制球磨工艺对于正极复合材料制备的极端重要性。
Keyword:
chemical process engineering
DEM simulation
microstructure
process–structure–property
solid-state battery
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3.1W
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Helmholtz Institute Munster Ionics in Energy Storage
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Institute of Inorganic and Analytical Chemistry
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21
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Institute for Particle Technology
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28
论文数: 11
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