Ni-Rich Li[NixMnyCo1–x–y]O2 Single Crystals as Superior Fast Charge Cathodes for Lithium-Ion Batteries

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-04-16 DOI:10.1021/acsenergylett.5c00736

Vivekanantha Murugan, Hoon-Hee Ryu, Guoying Chen

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Abstract

The utilization of single-crystal (SC) Li[Ni_xMn_yCo_1–x–y]O₂ (NMC) cathodes has facilitated unparalleled performance in commercial high-energy lithium-ion batteries (LIBs). In the current study, we evaluate the application of SC cathodes in fast charge (FC)-LIBs where particle cracking is a predominant failure mechanism. Ni-rich SC-NMC samples with various compositions, sizes, and shapes are synthesized and investigated for their influence on FC performance. We reveal the necessity of utilizing smaller SCs (<1 μm) as larger sizes (>2 μm) experience significant particle-level lithium concentration gradients under FC conditions. To improve lithium transport and minimize side reactivities, we strategically expose the (104) crystal facets on the surface. Exceptional performance was observed on an optimized SC-LiNi_0.80Mn_0.05Co_0.15O₂, delivering a discharge capacity of 165 mAh/g even after 150 cycles at 6C charge. Our study not only demonstrates the promise of SC-NMC but also provides the key insights for the design and optimization of advanced cathodes for FC-LIBs.

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富镍Li[NixMnyCo1-x-y]O2单晶作为锂离子电池快速充电阴极

单晶（SC） Li[NixMnyCo1-x-y]O2 （NMC）阴极在商用高能锂离子电池（LIBs）中具有无与伦比的性能。在当前的研究中，我们评估了SC阴极在快速充电(FC)- lib中的应用，其中颗粒开裂是主要的失效机制。合成了不同组成、尺寸和形状的富镍SC-NMC样品，并研究了它们对FC性能的影响。我们揭示了利用更小的sc （> 1 μm）的必要性，因为更大的尺寸（>2 μm）在FC条件下会经历显著的颗粒级锂浓度梯度。为了改善锂传输和减少副反应，我们策略性地暴露了表面的（104）晶体面。在优化后的SC-LiNi0.80Mn0.05Co0.15O2上观察到优异的性能，即使在6C充电150次后也能提供165 mAh/g的放电容量。我们的研究不仅展示了SC-NMC的前景，而且为fc - lib先进阴极的设计和优化提供了关键见解。

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来源期刊

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.