IF 19.3 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Ke Zhou, Sijian Lu, Charles Mish, Yu-Ting Chen, Shijie Feng, Jiyoung Kim, Min-Sang Song, Hyunsun Alicia Kim, Ping Liu
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引用次数: 0

摘要

全固态电池(ASSB)的实际应用需要在低压下可靠运行,这仍然是一项重大挑战。在这项工作中,我们研究了由不同粒径的固态电解质(SSE)组成的阴极复合微结构的作用。由 LiNi0.8Co0.1Mn0.1O2 (NCM811) 和细颗粒 Li6PS5Cl (LPSC) 组成的复合材料显示,固态电解质在 NCM811 颗粒表面的分布更加均匀,确保了亲密接触。此外,这种复合材料还减少了曲折性,从而增强了锂离子传导能力。这些微结构优势显著降低了电荷转移电阻,有助于抑制低压条件下循环过程中的机械变形和电化学降解。因此,精细 LPSC 阴极复合材料在 2 兆帕的中等叠加压力下表现出更高的循环稳定性,优于其粗 LPSC 复合物。我们的发现证实了微结构设计在实现低压条件下高性能 ASSB 方面的重要作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Tailored Cathode Composite Microstructure Enables Long Cycle Life at Low Pressure for All-Solid-State Batteries

Tailored Cathode Composite Microstructure Enables Long Cycle Life at Low Pressure for All-Solid-State Batteries
The practical application of all-solid-state batteries (ASSBs) requires reliable operation at low pressures, which remains a significant challenge. In this work, we examine the role of a cathode composite microstructure composed of solid-state electrolyte (SSE) with different particle sizes. A composite made of LiNi0.8Co0.1Mn0.1O2 (NCM811) and fine-particle Li6PS5Cl (LPSC) shows a more uniform distribution of SSE on the surface of NCM811 particles, ensuring intimate contact. Moreover, the composite features reduced tortuosity, which enhances Li ion conduction. These microstructural advantages result in significantly reduced charge transfer resistance, helping to suppress mechanical distortion and electrochemical degradation during cycling under low-pressure conditions. As a result, the fine-LPSC cathode composite exhibits enhanced cycling stability at a moderate stack pressure of 2 MPa, outperforming its coarse-LPSC counterpart. Our finding confirms the important role of microstructure design in enabling high-performance ASSBs operating under low-pressure conditions.
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来源期刊
ACS Energy Letters
ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment
CiteScore
31.20
自引率
5.00%
发文量
469
审稿时长
1 months
期刊介绍: ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.
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