S掺杂/Li<sub>2</sub>SO<sub>4</sub>包覆富锂锰基正极材料的电化学性能研究

范信娥; 康绍伟; 黎小琼; 胡思江; 王红强; 李庆余

doi:10.19799/j.cnki.2095-4239.2026.0236

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S掺杂/Li₂SO₄包覆富锂锰基正极材料的电化学性能研究

储能材料与器件 | 更新时间：2026-08-26

- S掺杂/Li₂SO₄包覆富锂锰基正极材料的电化学性能研究
- Electrochemical performance of S-doped and Li₂SO₄-coated Li-rich Mn-based cathode materials
- 储能科学与技术 2026年15卷第8期页码：2986-2996
- 作者机构：
  
  1.岚图汽车科技股份有限公司，湖北武汉 430090
  2.广西师范大学广西低碳能源材料重点实验室，广西桂林 541004
- 作者简介：
  
  范信娥（1997—），女，硕士，工程师，研究方向为锂离子电池，E-mail：fxegdbt@163.com；
  胡思江，教授，研究方向为锂/钠离子电池，E-mail：sjhu@gxnu.edu.cn。
- 基金信息：
  
  国家自然科学基金联合基金项目(U23A20577)
- DOI：10.19799/j.cnki.2095-4239.2026.0236
  中图分类号： TM 911
- 收稿：2026-03-24，
  
  修回：2026-05-09，
  
  网络首发：2026-08-26，
  
  纸质出版：2026-08-28
- 稿件说明：
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范信娥, 康绍伟, 黎小琼, 等. S掺杂/Li₂SO₄包覆富锂锰基正极材料的电化学性能研究[J]. 储能科学与技术, 2026, 15(8): 2986-2996. DOI: 10.19799/j.cnki.2095-4239.2026.0236.

FAN Xine, KANG Shaowei, LI Xiaoqiong, et al. Electrochemical performance of S-doped and Li₂SO₄-coated Li-rich Mn-based cathode materials[J]. Energy Storage Science and Technology, 2026, 15(8): 2986-2996. DOI: 10.19799/j.cnki.2095-4239.2026.0236.
范信娥, 康绍伟, 黎小琼, 等. S掺杂/Li₂SO₄包覆富锂锰基正极材料的电化学性能研究[J]. 储能科学与技术, 2026, 15(8): 2986-2996. DOI: 10.19799/j.cnki.2095-4239.2026.0236. DOI：

FAN Xine, KANG Shaowei, LI Xiaoqiong, et al. Electrochemical performance of S-doped and Li₂SO₄-coated Li-rich Mn-based cathode materials[J]. Energy Storage Science and Technology, 2026, 15(8): 2986-2996. DOI: 10.19799/j.cnki.2095-4239.2026.0236. DOI：

摘要

采用溶液法与氧化还原法制备了S掺杂与Li

包覆协同改性的富锂锰基正极材料（NSLRM）。借助透射电子显微镜（TEM）和X射线光电子能谱（XPS）等表征手段，分析了改性前后材料的微观结构与表面化学状态。结果表明，NSLRM表面形成厚度为3~5 nm的Li

包覆层，且同时存在SO

与S

物种。电化学测试显示，改性材料的首次库仑效率（ICE）均高于88%，优于未改性材料；在1 C倍率下循环300次后，2%改性材料（NSLRM2）的可逆比容量保持153 mAh

/g，容量保持率达70.29%，显著高于原始材料（LRM）的111.3 mAh/g和48.79%；在5 C和10 C高倍率下，NSLRM2的放电比容量分别为151.2 mAh/g和116.8 mAh/g，远高于LRM的121.3 mAh/g和74.7 mAh/g。电化学性能的提升主要归因于S掺杂增强了过渡金属与氧之间的键合强度，Li

包覆层提供了良好的锂离子传导路径，同时S掺杂诱导的氧空位促进锂离子的快速传输并抑制晶格氧释放，显著提升了结构稳定性。本研究为开发高比容量、优异循环稳定性的富锂锰基正极材料提供了可行策略，为高性能锂离子电池研发提供实验依据。

Abstract

In this study

S-doped and Li

-coated Li-rich Mn-based cathode materials (NSLRMs) were synthesized using a combined solution and redox method. The microstructure and surface chemistry were characterized by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). TEM revealed a uniform coating layer approximately 3-5 nm thick on the NSLRM surface

and XPS confirmed the coexistence of SO

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=116264445&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=116264423&type=

2.37066650

4.57200003

and S

species. Electrochemical tests showed that the initial Coulombic efficiency of all modified materials exceeded 88%

which was significantly higher than that of the pristine material (LRM). After 300 cycles at 1 C

2% modified material (NSLRM2) retained a reversible specific capacity of 153 mAh/g with a capacity retention of 70.29%

outperforming the LRM (111.3 mAh/g and 48.79%

respectively). Furthermore

NSLRM2 delivered discharge capacities of 151.2 mAh/g and 116.8 mAh/g at 5 C and 10 C

respectively (compared to 121.3 mAh/g and 74.7 mAh/g

for the LRM). The enhanced electrochemical performance is attributed to several factors: S-doping strengthens transition metal bonding with oxygen

while the Li

coating provides rapid Li

conduction pathways. In addition

S-doping-induced oxygen vacancies further facilitate Li

transport and suppress lattice oxygen release

thereby improving structural stability. This work provides an effective strategy for developing Li-rich Mn-based cathode materials with high specific capacities and excellent cycling stabilities

offering experimental insight for high-performance lithium-ion batteries.

关键词

Keywords

references

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DOI：10.19799/j.cnki.2095-4239.2026.0236

摘要

Abstract

关键词

Keywords

references

S掺杂/Li₂SO₄包覆富锂锰基正极材料的电化学性能研究

Electrochemical performance of S-doped and Li₂SO₄-coated Li-rich Mn-based cathode materials