Structural Regulation Enables High Interfacial Functionality for Ni-Rich Single-Crystalline Cathodes

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Materials & Interfaces Pub Date : 2024-09-24 DOI:10.1021/acsami.4c10398

Pei Liu, Haoran Wei, Tao Huang, Zhencheng Huang, Lingli Chen, Xuanlong He, Yuying Liu, Hongkai Yang, Mijie Liu, Shenghua Ye, Xuming Yang, Zhanhua Wu, Yaming Liu, Qingqing Jia, XiaoBai Ma, Jing Chen, Xiangzhong Ren, Xiaoping Ouyang, Jianhong Liu, Qianling Zhang, Jiangtao Hu

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Abstract

Ni-rich single-crystalline layered cathodes have garnered significant attention due to their high energy density and thermal stability. However, they experience severe capacity degradation caused by lattice strain and interfacial side reactions during practical applications. In this study, an effective yttrium modification method is employed to stabilize the structure of Ni-rich single-crystalline LiNi_0.83Mn_0.05Co_0.12O₂ (SC-NMC83) to solve these issues. This innovative approach successfully immobilizes oxygen within the material, preventing crack formation while simultaneously broadening the diffusion path of Li⁺. The yttrium-modified sample (SC-NMC83-Y) exhibits a superior capacity retention compared to the SC-NMC83 sample, with values of 90% and 76.1% after 100 cycles, respectively. This work demonstrates the promising potential of a doping strategy for Ni-rich single-crystalline cathodes and paves a pathway for its practical implementation, such as all-solid-state batteries.

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通过结构调整实现富镍单晶阴极的高界面功能性

富镍单晶层状阴极因其高能量密度和热稳定性而备受关注。然而，在实际应用过程中，由于晶格应变和界面副反应，它们会出现严重的容量衰减。本研究采用了一种有效的钇改性方法来稳定富镍单晶锂镍0.83Mn0.05Co0.12O2（SC-NMC83）的结构，以解决这些问题。这种创新方法成功地固定了材料中的氧气，防止了裂纹的形成，同时拓宽了 Li+ 的扩散路径。与 SC-NMC83 样品相比，钇改性样品（SC-NMC83-Y）的容量保持率更高，100 次循环后分别达到 90% 和 76.1%。这项工作证明了富镍单晶阴极掺杂策略的巨大潜力，并为其实际应用（如全固态电池）铺平了道路。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.

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