Constructing tri-functional modification for spinel LiNi₀.₅Mn₁.₅O₄ via fast ion conductor

Title data

Li, Li ; Zhao, Rui ; Pan, Du ; Yi, Shuhong ; Gao, Liufei ; He, Guanjie ; Zhao, Huiling ; Yu, Caiyan ; Bai, Ying:
Constructing tri-functional modification for spinel LiNi₀.₅Mn₁.₅O₄ via fast ion conductor.
In: Journal of Power Sources. Vol. 450 (2020) . - 227677.
ISSN 0378-7753
DOI: https://doi.org/10.1016/j.jpowsour.2019.227677

Official URL:

Abstract in another language

Instable surface structure and low capacity retention hinder the further application of high voltage LiNi0.5Mn1.5O4 (LNMO) cathode in lithium-ion battery. In order to promote its electrochemical performances, Li6.4La3Al0.2Zr2O12 (LLAZO) with the intrinsic property of fast ion conductivity has been employed as a protective layer to modify surface of LNMO. By regulating the LLAZO contents, 1 wt LLAZO coated LNMO (LLAZO-1) cathode shows a high capacity of 92.1 mAh g−1 over 600 cycles with a capacity retention of 72.6 at 1 C and a reversible capacity of 57.9 mAh g−1 at 20 C, much higher than those of pristine LNMO. Further investigation indicates that the greatly improved electrochemical performances of LLAZO-1 can be attributed to the LLAZO modification, which including the LLAZO surface coating and La3+ and Zr4+ gradient co-doping. In addition, the LLAZO precursor significantly restricts the growth of LNMO precursor particles during calcination process, shorting Li+ migration pathway. Thus, modification strategy effectively improves the structure stability of LNMO, accompanied with the enhancement in lithium-ion diffusion kinetics performances and confinement in particle growth. This optimization approach with tri-functions sheds light on novel electrode design and construction in rechargeable batteries.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Lithium-ion batteries; LiNiMnO; LiLaAlZrO; Tri-functional modification
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT:	No
DDC Subjects:	500 Science > 500 Natural sciences 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	27 Nov 2023 09:03
Last Modified:	27 Nov 2023 09:03
URI:	https://eref.uni-bayreuth.de/id/eprint/87866