Sm Doping-Enhanced Li3VO4/C Electrode Kinetics for High-Performance Lithium-Ion Batteries

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2025-03-12 DOI:10.1021/acsaem.4c0316610.1021/acsaem.4c03166

Yuanlang Wan, Xuefang Xie, Shuang Zhou, Weihang Li, Jingkang Ma, Yaqin Zhou, Yijian Song, Ji Zhou and Anqiang Pan*,

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引用次数: 0

Abstract

Li₃VO₄ (LVO) presents significant advantages in cost and capacity, making it a promising candidate for next-generation lithium-ion battery (LIB) anodes. However, its low electronic conductivity hampers practical applications. Herein, we report a Sm-modified Li₃VO₄/C composite (LSVO/C) designed for high-performance LIBs. Sm doping introduces additional defects and optimizes the electronic structure of Li₃VO₄, resulting in a significantly enhanced electronic conductivity (2.94 × 10^–3 S cm^–1) of the composites. Furthermore, the carbon-fiber-based framework effectively maintains structural stability during cycling, facilitating superior ion transport kinetics. Benefiting from these enhancements, the LSVO/C composite achieves remarkable discharge capacities of 379.5 mAh g^–1 at 0.25 C and 260.1 mAh g^–1 at 12.5 C. Additionally, an LSVO/C||NCM111 full cell, using LiNi_1/3Co_1/3Mn_1/3O₂ (NCM111) as the cathode, retains a discharge capacity of 50.5 mAh g^–1 after 1000 cycles at 3.0 C, highlighting the potential of LSVO/C for practical applications. This unique method in preparing anode material will open new gates for highly efficient LIBs.

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Sm掺杂增强高性能锂离子电池Li3VO4/C电极动力学

Li3VO4 （LVO）在成本和容量方面具有显着优势，使其成为下一代锂离子电池（LIB）阳极的有希望的候选者。然而，它的低电子导电性阻碍了实际应用。在此，我们报道了一种设计用于高性能lib的sm改性Li3VO4/C复合材料（LSVO/C）。Sm掺杂引入了额外的缺陷并优化了Li3VO4的电子结构，导致复合材料的电子导电性显著提高（2.94 × 10-3 S cm-1）。此外，碳纤维基框架在循环过程中有效地保持了结构稳定性，促进了优异的离子传输动力学。得益于这些改进，LSVO/C复合材料在0.25 C和12.5 C下的放电容量分别达到379.5 mAh g-1和260.1 mAh g-1。此外，LSVO/C||NCM111全电池，使用LiNi1/3Co1/3Mn1/3O2 （NCM111）作为阴极，在3.0 C下循环1000次后仍保持50.5 mAh g-1的放电容量，突出了LSVO/C在实际应用中的潜力。这种制备阳极材料的独特方法将为高效lib打开新的大门。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.