Details

Autor(en) / Beteiligte

• Zhao, Enyue
• Fang, Lincan
• Chen, Minmin
• Chen, Dongfeng
• Huang, Qingzhen
• Hu, Zhongbo
• Yan, Qing-bo
• Wu, Meimei
• Xiao, Xiaoling

Titel

New insight into Li/Ni disorder in layered cathode materials for lithium ion batteries: a joint study of neutron diffraction, electrochemical kinetic analysis and first-principles calculations

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2017, Vol.5 (4), p.1679-1686

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Although layered cathode materials LiNi x Mn y Co 1−x−y O 2 have attracted much attention due to their number of advantages, the issue of Li/Ni disorder seriously restricts their electrochemical properties. It is very important and pivotal for the better optimization of layered cathode materials to clearly explain the detailed relationships among the Li/Ni disorder, Li + migration resistance, electrochemical kinetics and electrochemical properties. Here we focus on the LiNi x Mn y Co 1−x−y O 2 cathode material and report relationships among the crystal structures, Li + migration resistance, electrochemical kinetics and electrochemical properties by combining neutron diffraction techniques, electrochemical kinetic analysis techniques and first-principles calculation methods. The results suggest that more Li + /Ni 2+ ion exchange will shrink the inter-slab space thickness, causing a higher Li + ion migration barrier and inferior electrochemical kinetics, all of which should be responsible for the limited electrochemical properties.