English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Feasibility to Improve the Stability of Lithium-Rich Layered Oxides by Surface Doping

Liu, Z., Liu, S., Yang, L., Zhang, C., Shen, X., Zhang, Q., et al. (2022). Feasibility to Improve the Stability of Lithium-Rich Layered Oxides by Surface Doping. ACS Applied Materials and Interfaces, 14(16), 18353-18359. doi:10.1021/acsami.2c00155.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Liu, Zepeng1, Author
Liu, Shuai1, Author
Yang, Lu1, Author
Zhang, Chu1, Author
Shen, Xi1, Author
Zhang, Qinghua1, Author
Lin, Hong-Ji1, Author
Chen, Chin-Te1, Author
Hu, Zhiwei2, Author              
Yang, Yuan1, Author
Ma, Jun1, Author
Yu, Richeng1, Author
Wang, Xuefeng1, Author
Wang, Zhaoxiang1, Author
Chen, Liquan1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

Content

show
hide
Free keywords: Cathodes; Density functional theory; Electron energy levels; Electron energy loss spectroscopy; Electron scattering; Electronic structure; Energy dissipation; High resolution transmission electron microscopy; Lithium; Lithium compounds; Scanning electron microscopy; Titanium oxides; Transition metals; X ray absorption spectroscopy; Zirconium compounds, Cathodes material; Layered oxides; Li-rich layered oxide; Lithium-rich layered oxides; Oxygen retention; Rate performance; Specific capacities; Structured oxides; Surface doping; Voltage decay, Oxygen
 Abstract: Li-rich layer-structured oxides are considered promising cathode materials for their specific capacities above 250 mAh·g-1. However, the drawbacks such as poor rate performance, fast capacity fading, and the continuous transition metal (TM) migration into the Li layer hinder their commercial applications. To address these issues, surface doping of Ti and Zr was conducted to the Li- and Mn-rich layered oxide (LMR), Li1.2Mn0.54Ni0.13Co0.13O2. The drop of the average discharge potentials of the Ti- and Zr-doped LMR was reduced by 593 and 346 mV in 100 cycles, respectively. With aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy, we clarified that Ti4+and Zr4+ions are located near the surface of the material, anchor the surface oxygen, and stabilize the LMR structure. The difference in the strengths of the Ti-O and Zr-O bonds and the doping-resultant electronic structures were determined with density functional theory (DFT) calculations and soft X-ray absorption spectroscopy (SXAS), responsible for the electrochemical performance of surface-doped materials. These findings verify our modification strategies to enhance the cycling performances of the promising LMR cathode materials. © 2022 American Chemical Society. All rights reserved.

Details

show
hide
Language(s): eng - English
 Dates: 2022-04-132022-04-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acsami.2c00155
BibTex Citekey: Liu202218353
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: ACS Applied Materials and Interfaces
  Abbreviation : ACS Appl. Mater. Interfaces
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 14 (16) Sequence Number: - Start / End Page: 18353 - 18359 Identifier: ISSN: 1944-8244
CoNE: https://pure.mpg.de/cone/journals/resource/1944-8244