物理化学学报 >> 2025, Vol. 41 >> Issue (9): 100096.doi: 10.1016/j.actphy.2025.100096
祝鑫彤1,2, 曹斌2,3, 闫崇4, 唐城2,5,*(
), 陈爱兵1,*(
), 张强2,6,*(
)
收稿日期:2025-03-05
修回日期:2025-04-11
录用日期:2025-04-18
发布日期:2025-07-04
通讯作者:
Email: cheng–net0@tsinghua.edu.cn (唐城)chen_ab@163.com (陈爱兵)zhang–qiang@mails.tsinghua.edu.cn (张强)
基金资助:
Xintong Zhu1,2, Bin Cao2,3, Chong Yan4, Cheng Tang2,5,*(
), Aibing Chen1,*(
), Qiang Zhang2,6,*(
)
Received:2025-03-05
Revised:2025-04-11
Accepted:2025-04-18
Published:2025-07-04
Contact:
Email: cheng–net0@tsinghua.edu.cn (Cheng Tang)chen_ab@163.com (Aibing Chen)zhang–qiang@mails.tsinghua.edu.cn (Qiang Zhang)
Supported by:摘要:
石墨负极是目前锂离子电池中广泛使用的商品化负极材料,其在接触电解液发生储锂时会因有机电解液的还原分解而形成一层固体电解质界面膜(SEI)。该界面膜对锂离子电池的循环稳定性、快充性能、安全性能等诸多方面有着关键影响。通过在石墨表面构建一层包覆层,减少其与电解液之间的副反应并促进稳定电极界面的形成,可以提高储锂的电化学性能。表面包覆通常通过气相或液相法实现,包覆材料主要包括碳材料、锂离子导体、金属化合物和聚合物材料等体系。本文评述了不同包覆材料和方法对石墨负极性能的提升作用,分析了包覆改性策略影响电池快充性能和循环稳定性的机制,为锂离子电池负极材料的研究和开发提供了材料物理化学基础。
祝鑫彤, 曹斌, 闫崇, 唐城, 陈爱兵, 张强. 锂离子电池石墨负极包覆研究进展[J]. 物理化学学报, 2025, 41(9), 100096. doi: 10.1016/j.actphy.2025.100096
Xintong Zhu, Bin Cao, Chong Yan, Cheng Tang, Aibing Chen, Qiang Zhang. Advances in coating strategies for graphite anodes in lithium-ion batteries[J]. Acta Phys. -Chim. Sin. 2025, 41(9), 100096. doi: 10.1016/j.actphy.2025.100096
表1
"
| Coating method | Coating layer homogeneity | Cost | Complexity of process | Temperature/Pressure | Applicable coating materials |
| Hydrothermal | High | High | Simple process, not optimized for large-scale application | Medium temperature, high pressure | Carbon material, Li-ion conductor, metal compound |
| Co-precipitation | Medium | Low | Mature process, scalable for large-scale application | Room temperature | Carbon material, Li-ion conductor, metal compound |
| Sol-gel | High | Low | Mature process, scalable for large-scale application | Room temperature | Carbon material, Li-ion conductor, metal compound, polymer material |
| Chemical vapor deposition | High | Medium | Mature process, scalable for large-scale application | High temperature (> 500 ℃) | Carbon material, Li-ion conductor, metal compound, polymer material |
| Atomic/molecular layer deposition | Extremely high | Extremely high | Complex process, not optimized for large-scale application | Medium temperature | Carbon material, Li-ion conductor, metal compound |
| Spray drying | High | Medium | Mature process, scalable for large-scale application | Medium temperature | Carbon material, Li-ion conductor, metal compound |
表2
"
| Coating material | Key features | Ionic conductivity | Electrical conductivity | SEI regulation/mechanical properties | Electrochemical properties |
| Carbon material | Conductive for both ions and electrons | Large interlamellar spacing promotes Li+ diffusion | High conduction | Thin and stable SEl formation/low hardness | Improve the initial Coulombic efficiency and rate performance |
| Li-ion conductor | High conductivity of Li+ ions | Accelerating desolvation | Insulation | Inorganic-rich SEI/medium hardness | Improve the low-temperature and fast-charging performance |
| Metal compound | Electrically conductive, stable interface | High Li+ adsorption | Insulation or partial conduction | Physically hinder electrolyte decomposition/high hardness | Improve the cycle stability |
| Polymer material | Flexible SEI, uniform deposition of Li | Polar groups promote Li+ conduction | Insulation or partial conduction | Inner organic-outer inorganic composite SEI/high flexibility | Reduce lithium dendrites |
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