阴阳离子Ti4+与PO43−共掺杂的富锂锰基正极材料的改性研究

肖嘉诚; 莫泽新; 王嘉瑞; 刘晨宇; 罗冬; 林展

doi:10.12052/gdutxb.250065

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阴阳离子Ti⁴⁺与PO₄³⁻共掺杂的富锂锰基正极材料的改性研究

材料科学与工程 | 更新时间：2026-08-04

- 阴阳离子Ti⁴⁺与PO₄³⁻共掺杂的富锂锰基正极材料的改性研究
- Modification of Lithium-rich Manganese-based Cathode Materials Based on Anion-cation Co-doping of Ti⁴⁺ and PO₄³⁻
- 广东工业大学学报 2026年43卷第4期页码：30-38
- 作者机构：
  
  1. 广东工业大学轻工化工学院,广东,广州,510006
  2. 湖南科技大学材料科学与工程学院,湖南,湘潭,411201
- 作者简介：
  
  肖嘉诚(1999–)，男，硕士研究生，主要研究方向为富锂锰基正极材料，E-mail：xiaojiacheng1120@163.com
  刘晨宇(1989–)，女，讲师，博士，主要研究方向为富锂锰基正极材料，E-mail：cy.liu@gdut.edu.cn
- 基金信息：
  
  广东省应用基础研究基金资助项目(2024B1515020071);国家自然科学基金资助项目(52371217, 22408053);湖南省科技创新计划项目(2024RC3217);广东省科技计划项目(2023A0505020009)
- DOI：10.12052/gdutxb.250065
  中图分类号： TM912;TQ152
- 纸质出版：2026
- 稿件说明：
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肖嘉诚, 莫泽新, 王嘉瑞, 等. 阴阳离子Ti⁴⁺与PO₄³⁻共掺杂的富锂锰基正极材料的改性研究[J]. 广东工业大学学报, 2026, 43(4): 30-38. DOI: 10.12052/gdutxb.250065.
肖嘉诚, 莫泽新, 王嘉瑞, 等. 阴阳离子Ti⁴⁺与PO₄³⁻共掺杂的富锂锰基正极材料的改性研究[J]. 广东工业大学学报, 2026, 43(4): 30-38. DOI: 10.12052/gdutxb.250065. DOI：

DOI： 10.12052/gdutxb.250065

摘要

富锂锰基正极材料

MnO

·(1−

)LiTMO

(TM=Ni

Co或Mn) 具有高比容量和高电压等优势，是极具潜力的锂离子电池正极材料，但存在首次库仑效率低、容量和电压衰减快等问题，这限制了其商业化应用。本文提出通过 Ti

和${\mathrm{PO}}_4^{3-} $阴阳离子共掺杂对富锂锰基氧化物 Li

1.2

0.6

0.2

进行改性。一方面，Ti

掺杂可以优化Li

扩散路径，加快 Li

扩散速率，进而提升材料的循环性能和倍率性能；另一方面，${\mathrm{PO}}_4^{3-} $掺杂能改变材料的电子结构，削弱过渡金属−氧(TM—O)键的共价性，抑制晶格氧的不可逆损失，稳定材料结构。表征结果显示，共掺杂使材料晶格发生膨胀，Li

扩散系数增大。电化学测试表明，改性后的材料在 1 C 倍率下循环 400 次后容量保持率可达 89.5%，显著高于未掺杂的原始材料；在 5 C 高倍率下，比容量仍能达到 139.5 mAh·g

−1

，展现出良好的倍率性能。本文研究为高性能锂离子电池富锂锰基正极材料的改性提供了一种有效的阴阳离子共掺杂策略。

Abstract

Lithium-rich manganese-based cathode materials

MnO

·(1−

) LiTMO

(TM=Ni

Co or Mn) are highly promising cathode materials for lithium-ion batteries due to their advantages such

as high specific capacity and high voltage. However

problems like low initial Coulombic efficiency

rapid capacity and voltage decay limit their commercial applications. In this study

it is proposed to modify the lithium-rich manganese-based oxide Li

1.2

0.6

0.2

through the co-doping of anions and cations of Ti

and ${\mathrm{PO}}_4^{3-} $. On the one hand

doping can optimize the Li

diffusion pathway and accelerate the diffusion rate of Li

thereby improving the cycling performance and rate performance of the material. On the other hand

${\mathrm{PO}}_4^{3-} $ doping can change the electronic structure of the material

weaken the covalency of the transition metal-oxygen (TM—O) bond

inhibit the irreversible loss of lattice oxygen

and stabilize the material structure. The characterization results show that the co-doping causes the expansion of the material lattice and increases the diffusion coefficient of Li

. Electrochemical tests indicate that the modified material can achieve a capacity retention rate of 89.5% after 400 cycles at a rate of 1 C

which is significantly higher than that of the undoped original material. At a high rate of 5 C

the specific capacity can still reach 139.5 mAh·g

−1

demonstrating excellent rate performance. This study provides an effective strategy of anion-cation co-doping for the modification of lithium-rich manganese-based cathode materials for high-performance lithium-ion batteries.

关键词

Keywords

references

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