Li7La3Zr2O12-co-LiNbO3 Surface Modification Improves the Interface Stability between Cathode and Sulfide Solid-State Electrolyte in All-Solid-State Batteries

Liang, Shishuo1,2; Yang, Dong1; Hu, Jianhua1; Kang, Shusen2; Zhang, Xue3; Fan, Yanchen4,5,6

2023-02-01

10.3390/membranes13020216

MEMBRANES   Impact Factor & Quartile

2077-0375

With the rapid development of energy storage and electric vehicles, thiophosphate-based all-solid-state batteries (ASSBs) are considered the most promising power source. In order to commercialize ASSBs, the interfacial problem between high-voltage cathode active materials and thiophosphate-based solid-state electrolytes needs to be solved in a simple, effective way. Surface coatings are considered the most promising approach to solving the interfacial problem because surface coatings could prevent direct physical contact between cathode active materials and thiophosphate-based solid-state electrolytes. In this work, Li7La3Zr2O12 (LLZO) and LiNbO3 (LNO) coatings for LiCoO2 (LCO) were fabricated by in-situ interfacial growth of two high-Li+ conductive oxide electrolytes on the LCO surface and tested for thiophosphate-based ASSBs. The coatings were obtained from a two-step traditional sol-gel coatings process, the inner coatings were LNO, and the surface coatings were LLZO. Electrochemical evaluations confirmed that the two-layer coatings are beneficial for ASSBs. ASSBs containing LLZO-co-LNO coatings LiCoO2 (LLZO&LNO@LCO) significantly improved long-term cycling performance and discharge capacity compared with those assembled from uncoated LCO. LLZO&LNO@LCO||Li6PS5Cl (LPSC)||Li-In delivered discharge capacities of 138.8 mAh/g, 101.8 mAh/g, 60.2 mAh/g, and 40.2 mAh/g at 0.05 C, 0.1 C, 0.2 C, and 0.5 C under room temperature, respectively, and better capacity retentions of 98% after 300 cycles at 0.05 C. The results highlighted promising low-cost and scalable cathode material coatings for ASSBs.

solid-state batteries LiCoO2 sulfide solid-state electrolyte LiNbO3-coating LLZO-coating

SCI

English

Corresponding

National Natural Science Foundation of China["51773042","51973040"] ; China Postdoctoral Science Foundation[2022M722214]

Biochemistry & Molecular Biology ; Chemistry ; Engineering ; Materials Science ; Polymer Science

Biochemistry & Molecular Biology ; Chemistry, Physical ; Engineering, Chemical ; Materials Science, Multidisciplinary ; Polymer Science

WOS:000940592500001

MDPI

Web of Science

1.Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymer, Shanghai 200438, Peoples R China
2.Sunwoda Elect Vehicle Battery Co, Shenzhen 518107, Peoples R China
3.Jilin Agr Univ, Coll Resources & Environm, Changchun 130118, Peoples R China
4.Petro China Shenzhen Renewable Energy Res Inst Co, Shenzhen 518000, Peoples R China
5.CNPC Shenzhen New Energy Res Inst Co Ltd, Shenzhen 518000, Peoples R China
6.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Liang, Shishuo,Yang, Dong,Hu, Jianhua,et al. Li7La3Zr2O12-co-LiNbO3 Surface Modification Improves the Interface Stability between Cathode and Sulfide Solid-State Electrolyte in All-Solid-State Batteries[J]. MEMBRANES,2023,13(2).

Liang, Shishuo,Yang, Dong,Hu, Jianhua,Kang, Shusen,Zhang, Xue,&Fan, Yanchen.(2023).Li7La3Zr2O12-co-LiNbO3 Surface Modification Improves the Interface Stability between Cathode and Sulfide Solid-State Electrolyte in All-Solid-State Batteries.MEMBRANES,13(2).

Liang, Shishuo,et al."Li7La3Zr2O12-co-LiNbO3 Surface Modification Improves the Interface Stability between Cathode and Sulfide Solid-State Electrolyte in All-Solid-State Batteries".MEMBRANES 13.2(2023).