English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Li-Ti Cation Mixing Enhanced Structural and Performance Stability of Li-Rich Layered Oxide

Liu, S., Liu, Z., Shen, X., Wang, X., Liao, S.-C., Yu, R., et al. (2019). Li-Ti Cation Mixing Enhanced Structural and Performance Stability of Li-Rich Layered Oxide. Advanced Energy Materials, 1901530, pp. 1-10. doi:10.1002/aenm.201901530.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Liu, Shuai1, Author
Liu, Zepeng1, Author
Shen, Xi1, Author
Wang, Xuelong1, Author
Liao, Sheng-Chieh2, Author           
Yu, Richeng1, Author
Wang, Zhaoxiang1, Author
Hu, Zhiwei3, Author           
Chen, Chien-Te1, Author
Yu, Xiqian1, Author
Yang, Xiaoqing1, Author
Chen, Liquan1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

Content

show
hide
Free keywords: -
 Abstract: Li-rich layered metal oxides are one type of the most promising cathode materials in lithium-ion batteries but suffer from severe voltage decay during cycling because of the continuous transition metal (TM) migration into the Li layers. A Li-rich layered metal oxide Li1.2Ti0.26Ni0.18Co0.18Mn0.18O2 (LTR) is hereby designed, in which some of the Ti4+ cations are intrinsically present in the Li layers. The native Li-Ti cation mixing structure enhances the tolerance for structural distortion and inhibits the migration of the TM ions in the TMO2 slabs during (de)lithiation. Consequently, LTR exhibits a remarkable cycling stability of 97% capacity retention after 182 cycles, and the average discharge potential drops only 90 mV in 100 cycles. In-depth studies by electron energy loss spectroscopy and aberration-corrected scanning transmission electron microscopy demonstrate the Li-Ti mixing structure. The charge compensation mechanism is uncovered with X-ray absorption spectroscopy and explained with the density function theory calculations. These results show the superiority of introducing transition metal ions into the Li layers in reinforcing the structural stability of the Li-rich layered metal oxides. These findings shed light on a possible path to the development of Li-rich materials with better potential retention and a longer lifespan.

Details

show
hide
Language(s): eng - English
 Dates: 2019-07-192019-07-19
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000476337400001
DOI: 10.1002/aenm.201901530
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Advanced Energy Materials
  Abbreviation : Adv. Energy Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 1901530 Start / End Page: 1 - 10 Identifier: ISSN: 1614-6832
CoNE: https://pure.mpg.de/cone/journals/resource/1614-6832