LiVOPO4‐Modified Lithium‐Rich Layered Composite Cathodes for High‐Performance Lithium‐Ion Batteries,ChemElectroChem

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LiVOPO4‐Modified Lithium‐Rich Layered Composite Cathodes for High‐Performance Lithium‐Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-12-14 , DOI: 10.1002/celc.202001374
Tongxin Li ₁ , Donglin Li ₁ , Wei Zhang ₁ , Xiangze Kong ₁ , Peiqi Zhang ₁ , Xuqiang Ren ₁ , Qingbo Zhang ₁ , Jianhang Gao ₁ , Xiaoyong Fan ₁ , Lei Gou ₁

Affiliation

Li‐rich layered oxide Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ (LNCMO) is a promising cathode material for high‐energy‐density lithium‐ion batteries (LIBs). However, it suffers from severe capacity fading and voltage decay, especially at high voltage (>4.5 V). In this study, we successfully design an active LiVOPO₄ (LVOP) coating on the LNCMO surface. The LNCMO/LVOP composites exhibit enhanced rate capability and largely improved cycling stability during long‐term cycling. Such superior performances can be attributed to the active LVOP coating layer, which can suppress the parasitic reactions between the LNCMO surface and the electrolyte. This work shows the potential for designing Li‐rich layered composite cathode materials by coating the active phase for high energy/power LIBs.

中文翻译：

适用于高性能锂离子电池的LiVOPO4改性的富锂多层复合阴极

富锂氧化物Li _1.2 Ni _0.13 Co _0.13 Mn _0.54 O ₂（LNCMO）是一种有前途的正极材料，可用于高能量密度锂离子电池（LIB）。但是，它遭受严重的容量衰减和电压衰减的困扰，尤其是在高电压（> 4.5 V）下。在这项研究中，我们成功设计了有源LiVOPO ₄（LVOP）涂层在LNCMO表面上。LNCMO / LVOP复合材料在长期循环中表现出增强的倍率性能并大大改善了循环稳定性。这种优异的性能可以归因于活性LVOP涂层，该涂层可以抑制LNCMO表面与电解质之间的寄生反应。这项工作表明了通过涂覆高能量/功率LIB的活性相来设计富锂层状复合阴极材料的潜力。

更新日期：2021-02-01

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