Electrochemical elucidation of Co0.5M0.5V2O4 (M = Fe or Zn) nanocomposite anode materials for Li-ion storage,Materials Chemistry Frontiers

当前位置： X-MOL 学术 › Mater. Chem. Front. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Electrochemical elucidation of Co0.5M0.5V2O4 (M = Fe or Zn) nanocomposite anode materials for Li-ion storage
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-09-21 , DOI: 10.1039/d0qm00710b
Rasu Muruganantham _{1,

2,

3,

4,

5} , Jeng-Shin Lu _{1,

2,

3,

4,

5} , Bor Kae Chang _{5,

6,

7,

8} , Po Kai Wang _{5,

6,

7,

8} , Wei-Ren Liu _{1,

2,

3,

4,

5}

Affiliation

This work proposes spinel Co_0.5M_0.5V₂O₄ (M = Fe or Zn) nanocomposites as novel anode materials for Li-ion storage. Their electronic properties are predicted through theoretical analysis. The equal ratio of binary metal mixed V–O matrix spinel compounds actively improved the cyclic and rate capacities. The Co_0.5Zn_0.5V₂O₄ (CZVO) composite exhibits higher cyclic and rate capacities than the bare CoV₂O₄ (CVO) and Co_0.5Fe_0.5V₂O₄ (CFVO) samples. The CZVO sample demonstrates a higher reversible discharge capacity of 434 mA h g⁻¹ over 100 cycles at a current density of 200 mA g⁻¹. However, it has showed a higher rate capacity (129 mA h g⁻¹ at 5 A g⁻¹) than the other prepared samples (40 mA h g⁻¹ for bare CVO and 99 mA h g⁻¹ for CFVO at 5 A g⁻¹). The CZVO sample delivers superior electrochemical performance due to the conductivity improvements and a high order of the Co²⁺/Co³⁺ oxidation ratio. Thus, this report offers potential anode materials as an approach to improve binary metal mixed oxides for high-performance lithium storage applications in future.

中文翻译：

用于锂离子存储的Co0.5M0.5V2O4（M = Fe或Zn）纳米复合负极材料的电化学分析

这项工作提出了尖晶石Co _0.5 M _0.5 V ₂ O ₄（M = Fe或Zn）纳米复合材料作为新型的锂离子存储阳极材料。通过理论分析可以预测它们的电子性质。等比例的二元金属混合的V–O基体尖晶石化合物可有效提高循环容量和速率容量。Co _0.5 Zn _0.5 V ₂ O ₄（CZVO）复合材料比裸CoV ₂ O ₄（CVO）和Co _0.5 Fe _0.5 V ₂ O ₄具有更高的循环容量和倍率容量（CFVO）样本。CZVO样品在200 mA g ^-1的电流密度下，在100个循环中显示出更高的434 mA hg ^-1可逆放电容量。然而，它表现出较高的速率容量（129毫安汞柱^-1在5 A G ^-1）比其它制备的样品（40毫安汞柱^-1裸CVO和99毫安汞柱^-1在5 CFVO甲克^-1）。CZVO样品具有出色的电化学性能，这归因于电导率的改善和高阶的Co ²⁺ / Co ³⁺氧化率。因此，本报告提供了潜在的阳极材料，作为将来为高性能锂存储应用改进二元金属混合氧化物的一种方法。

更新日期：2020-10-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文