Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/37518
Title: Temperature-Driven Chemical Segregation in Co-Free Li-Rich-Layered Oxides and Its Influence on Electrochemical Performance
Authors: Rajappa Prakasha, Kunkanadu
Grins, Jekabs
Jaworski, Aleksander
Thersleff, Thomas
Svensson, Gunnar
Josang, Leif Olav
Dyrli, Anne Dalager
PAULUS, Andreas 
DE SLOOVERE, Dries 
D'HAEN, Jan 
VAN BAEL, Marlies 
HARDY, An 
Avireddy, Hemesh
Ramon Morante, Joan
Jacas Biendicho, Jordi
Issue Date: 2022
Publisher: AMER CHEMICAL SOC
Source: CHEMISTRY OF MATERIALS, 34 (8) , p. 3637 -3647
Abstract: Co-free Li-rich layered oxides are gaining interest as feasible positiveelectrode materials in lithium-ion batteries (LIBs) in terms of energy density, costreduction, and alleviating safety concerns. Unfortunately, their commercialization ishindered by severe structural degradation that occurs during electrochemical operation.The study at hand demonstrates advanced structural engineering of a Li-rich Co-freeoxide with composition Li1.1Ni0.35Mn0.55O2by spray pyrolysis and subsequentcalcination of an aqueous precursor, creating a segregated structure of two distinctlayered phases with space groupsR3??m(rhombohedral) andC2/m(monoclinic). Thisparticular structure was investigated with powder neutron diffraction, high-resolutionanalytical transmission electron microscopy imaging, and electron energy loss spectroscopic characterization. This complex structurecontributes to the high electrochemical stability and good rate capability observed for this compound (160 mAh/g at C/3 and 100mAh/g at 1C).These results provide new insights into the feasibility of developing and commercializing cobalt-free positiveelectrode materials for LIBs
Notes: Prakasha, KR (corresponding author), Catalonia Inst Energy Res IREC, Barcelona 08930, Spain.
pkunkanadu@irec.cat
Document URI: http://hdl.handle.net/1942/37518
ISSN: 0897-4756
e-ISSN: 1520-5002
DOI: 10.1021/acs.chemmater.1c04150
ISI #: WOS:000795962300005
Rights: 2022 American Chemical Society
Category: A1
Type: Journal Contribution
Validations: ecoom 2023
Appears in Collections:Research publications

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