Understanding the cation ordering transition in high-voltage spinelLiNi0.5Mn1.5O4 by doping Li instead of Ni

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486712.do
DOI
10.1038/s41598-017-07139-2
Title
Understanding the cation ordering transition in high-voltage spinelLiNi0.5Mn1.5O4 by doping Li instead of Ni
Description
This research was supported by Brain Korea 21 PLUS Project for Centerfor Creative Industrial Materials (F14SN02D1707) and POSTECH BasicScience Research Institute Grant. This work was partially supported bythe Fundamental R&D Program for Technology of World Premier Materials(WPM) funded by the Ministry of Knowledge Economy (grant no. 10037918).Also, this research was supported by Basic Science Research Programthrough the National Research Foundation of Korea (NRF) funded by theMinistry of Science, ICT & Future Planning (2015M2A2A6A01044985).
abstract
We determined how Li doping affects the Ni/Mn ordering in high-voltage spinel LiNi0.5Mn1.5O4(LNMO) by using neutron diffraction, TEM image, electrochemical measurements, and NMR data. The doped Li occupies empty octahedral interstitials (16c site) before the ordering transition, and can move to normal octahedral sites (16d (4b) site) after the transition. This movement strongly affects the Ni/Mn ordering transition because Li at 16c sites blocks the ordering transition pathway and Li at 16d (4b) sites affects electrostatic interactions with transition metals. As a result, Li doping increases in the Ni/Mn disordering without the effect of Mn3+ ions even though the Li-doped LNMO undergoes order-disorder transition at 700 degrees C. Li doping can control the amount of Ni/Mn disordering in the spinel without the negative effect of Mn3+ ions on the electrochemical property.
provenance
Made available in Cube on 2018-09-28T16:14:55Z (GMT). No. of bitstreams: 0
language
English
author
Lee, Junghwa
Dupre, Nicolas
Avdeev, Maxim
Kang, Byoungwoo
orcid
Avdeev, Maxim/0000-0003-2366-5809
accessioned
2018-09-28T16:14:55Z
available
2018-09-28T16:14:55Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486712.do
Funder
산업통상자원부
Funding Program
소재부품기술개발
Project ID
1415152052
Jurisdiction
Rep.of Korea
Project Name
Development of anode material for rechargeable batteries of 125~150Wh/US$ level
rights
openAccess
type
article


Files in This Item

There are no attached files.