La<sup>3+</sup> Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance

PAN Meiyi; YIN Feilong; XU Shibiao; WEI Zhengbing; MAO Aiqin; TAN Jie

doi:10.11949/0438-1157.20260598

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La³⁺ Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance

更新时间：2026-06-24

- La³⁺ Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance
- CIESC Journal (2026)
- 作者机构：
  
  1.安徽工业大学材料科学与工程学院先进陶瓷研究中心，安徽马鞍山 243032
  2.安徽工业大学，氢电高效转化与固态存储安徽省重点实验室，安徽马鞍山 243032
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260598
  CLC： TM912
- Received：27 April 2026，
  
  Revised：2026-06-18，
  
  Accepted：24 June 2026，
- 稿件说明：
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PAN Meiyi, YIN Feilong, XU Shibiao, et al. La³⁺ Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260598.
DOI：

PAN Meiyi, YIN Feilong, XU Shibiao, et al. La³⁺ Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260598. DOI：

摘要

针对尖晶石型高熵氧化物(High entropy oxides

HEOs)负极材料的前期循环稳定性差及电子/离子传输动力学缓慢的问题。采用溶液燃烧法，在尖晶石型(Co

0.2

)

中掺杂大阳离子半径的La

，构筑了一系列多孔网络结构的尖晶石-钙钛矿双相高熵氧化物(La

-Co

0.2

-Cr

0.2

-Fe

0.2

-Mn

0.2

-Ni

0.2

-O

=0.1、0.2、0.5和1.0)。结果表明，随着La

掺杂量增加，试样中尖晶石相逐渐向钙钛矿相转变，钙钛矿相比例显著上升，当x=0.5(5MLa0.5，钙钛矿相约46%)时，电极表现出最优电化学性能。优化的5MLa0.5电极在0.2 A·g

-1

下循环340次后，可逆比容量达1251 mAh·g

-1

，均高于尖晶石型(Co

0.2

)

和钙钛矿型La(Co

0.2

HEOs的理论比容量；在1 A·g

-1

下循环600次后，仍保持490 mAh·g

-1

的可逆比容量。电化学性能提升的原因主要归因于异质界面可以显著优化离子的吸附/脱附以及界面位置的电子密度，从而促进重复循环中的电荷转移以及电子/Li

扩散动力学，并增强了赝电容贡献。本研究通过La

掺杂调控尖晶石-钙钛矿双相比例，是提升HEOs负极储锂性能并抑制前期容量衰减的有效策略。

Abstract

To address the issues of poor initial cycling stability and sluggish electron/ion transport kinetics in spinel-type high-entropy oxides (HEOs) anode materials

a series of porous spinel–perovskite dual-phase HEOs (La

-Co

0.2

-Cr

0.2

-Fe

0.2

-Mn

0.2

-Ni

0.2

-O

=0.1

0.2

0.5 and 1.0) were constructed via a solution combustion method by introducing large-radius La

into spinel-type (Co

0.2

)

. The results show that with increasing La

content

the spinel phase gradually transforms into the perovskite phase

accompanied by a significant increase in the proportion of the perovskite phase. When

=0.5 (5MLa0.5

perovskite phase accounts for about 46%)

the electrode exhibits optimal electrochemical performance. After 340 cycles at 0.2 A·g

-1

the optimized 5MLa0.5 electrode delivers a reversible specific capacity of 1251 mAh·g

-1

which is higher than the theoretical specific capacities of both spinel-type (Co

0.2

)

and perovskite-type La(Co

0.2

HEOs. It still maintains a reversible specific capacity of 490 mAh·g

-1

after 600 cycles at 1 A·g

-1

. The improvement in electrochemical performance is mainly attributed to the fact that heterogeneous interfaces can significantly optimize the adsorption/desorption of ions and the electron density at the interface

thereby facilitating charge transfer and the diffusion kinetics of electrons and Li

during repeated cycles

as well as enhancing the pseudocapacitance contribution. This study that tuning the spinel–perovskite dual-phase ratio via La

doping is an effective strategy to improve the lithium storage performance of HEOs anodes and suppress early-stage capacity decay.

关键词

Keywords

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⁰

La3+ Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance

DOI：10.11949/0438-1157.20260598

摘要

Abstract

关键词

Keywords

references

La³⁺ Doped Spinel-Perovskite Dual-Phase High-Entropy Oxides for Lithium Storage Performance