Improving the cycling performance of LiNi0.8Co0.1Mn0.1O2 by surface coating with Li2TiO3. (1st September 2016)

• Record Type: Journal Article
• Authors: Meng, Kui; Wang, Zhixing; Guo, Huajun; Li, Xinhai; Wang, Ding
• Is Part Of: Electrochimica acta. Volume 211(2016)
• Page Start: 822
• Page End: 831
• Publication Date: 2016-09-01
• Subjects: Lithium ion battery -- Cathode material -- Surface modification -- Li2TiO3; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.06.110
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: A Li + conductor, Li2 TiO3, is coated on LiNi0.8 Co0.1 Mn0.1 O2 . Cycling stability of LiNi0.8 Co0.1 Mn0.1 O2 has been improved by Li2 TiO3 coating. Ti element did not penetrate into the bulk during coating process. Abstract: The cycling performance of LiNi0.8 Co0.1 Mn0.1 O2 has been effectively enhanced by Li2 TiO3 thin film coating. The Li2 TiO3 coating layer with an average thickness of 1 nm has been proved by XRD, HRTEM, FFT and XPS. Compared with the 80.5% capacity retention of bare materials, the modified LiNi0.8 Co0.1 Mn0.1 O2 materials Exhibit 98% capacity retention after 170 cycles at 1C rate. The reason for the improved cycling performance of LiNi0.8 Co0.1 Mn0.1 O2 is due to the surface layer of Li2 TiO3, which suppresses the direct contact between the active materials and the electrolytes, enhances the lithium ion diffusion between the electrode/electrolyte interface, and prevents the pulverization of the active materials during repeated charging/discharging.