Investigation of Electrochemical Stability of Ald Grown Li₃PO₄ Thin Films and Its Application in High-Voltage PEO-based All-Solid-State Lithium Batteries

Cai, Xincan1; Bao, Wenda1; Zhao, Lianqi1; Zuo, Yuqing1; Zhao, Haojie1; Su, Longxing2; Zhang, Yue1; Zhang, Hui3; Xie, Jin1,4,5

2023-10-01

10.1002/adsu.202300392

ADVANCED SUSTAINABLE SYSTEMS   Impact Factor & Quartile

2366-7486

In lithium batteries, the interface between electrolytes and electrodes with optimized structural stability and fast charge transfer kinetics plays a pivotal role in achieving overall cycle and rate performance. Introducing a uniform interfacial layer that conducts Li+ ions while insulating electrons, through atomic layer deposition (ALD) of lithium compounds, has shown promise in facilitating lithium ion transport and enhancing interface stability. However, synthesizing lithium compounds with both robust chemical stability and a broad electrochemical window using ALD poses challenges due to the difficulty of obtaining desired products under specific ALD reaction conditions. In this study, this challenge by investigating Li3PO4 is addressed, a compound grown by ALD that exhibits a noteworthy property: the in situ formation of a more stable LiPO3 phase under high applied voltage. The LiPO3 phase possesses an extended theoretical stability window (LiPO3: 2.48-5.00 V versus Li3PO4: 0.69-4.21 V), and its emergence substantially enhances the electrochemical performance of all-solid-state lithium batteries based on polyethylene oxide (PEO). This work not only presents experimental evidence of the in situ transformation of the interfacial layer but also offers a pragmatic approach to realizing all-solid-state lithium batteries with elevated energy density, emphasizing safety and stability considerations.

atomic layer deposition electrochemical stability high-voltage solid polymer electrolytes surface engineering

SCI

English

Others

This work was supported by 21C Innovation Laboratory, Contemporary Amperex Technology Ltd by project No. 21C-OP-202108. The authors also thank the support from the National Natural Science Foundation of China (22175117), the Startup Fund of Shanghai Tech U[21C-OP-202108] ; 21C Innovation Laboratory, Contemporary Amperex Technology Ltd[22175117] ; Double First-Class Initiative Fund of Shanghai Tech University["21DZ2260400","SPST-AIC10112914"]

Science & Technology - Other Topics ; Materials Science

Green & Sustainable Science & Technology ; Materials Science, Multidisciplinary

WOS:001093800200001

WILEY-V C H VERLAG GMBH

Web of Science

1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
2.Southern Univ Sci & Technol, Sch Microelect, Shenzhen 518055, Peoples R China
3.Chinese Acad Sci, State Key Lab Funct Mat Informat, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
4.Shanghai Tech Univ, Shanghai Key Lab High Resolut Electron Microscopy, Shanghai 201210, Peoples R China
5.Contemporary Amperex Technol Ltd, Innovat Lab 21C, LAB 21C, Ningde 352100, Fujian, Peoples R China

Cai, Xincan,Bao, Wenda,Zhao, Lianqi,et al. Investigation of Electrochemical Stability of Ald Grown Li₃PO₄ Thin Films and Its Application in High-Voltage PEO-based All-Solid-State Lithium Batteries[J]. ADVANCED SUSTAINABLE SYSTEMS,2023.

Cai, Xincan.,Bao, Wenda.,Zhao, Lianqi.,Zuo, Yuqing.,Zhao, Haojie.,...&Xie, Jin.(2023).Investigation of Electrochemical Stability of Ald Grown Li₃PO₄ Thin Films and Its Application in High-Voltage PEO-based All-Solid-State Lithium Batteries.ADVANCED SUSTAINABLE SYSTEMS.

Cai, Xincan,et al."Investigation of Electrochemical Stability of Ald Grown Li₃PO₄ Thin Films and Its Application in High-Voltage PEO-based All-Solid-State Lithium Batteries".ADVANCED SUSTAINABLE SYSTEMS (2023).