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Title: Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'{sub 2x})O{sub 2} (M'=Co,Al, Ti;x=0,0.025) cathode materials for li-ion rechargeable batteries.

Abstract

Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-x}M'{sub 2x})O{sub 2} materials (M'=Co, Al, Ti; x=0, 0.025) were synthesized using a manganese-nickel hydroxide precursor, and the effect of dopants on the electrochemical properties was investigated. Li(Ni0.5Mn0.5)O2 exhibited a discharge capacity of 120 mAh/g in the voltage range of 2.8-4.3 V with a slight capacity fade up to 40 cycles (0.09% per cycle); by doping of 5 mol% Co, Al, and Ti, the discharge capacities increased to 140, 142, and 132 mAh/g, respectively, and almost no capacity fading was observed. The cathode material containing 5 mol% Co had the lowest impedance, 47 {Omega} cm2, while undoped, Ti-doped, and Al-doped materials had impedance of 64, 62, and 99 {Omega} cm2, respectively. Unlike the other dopants, cobalt was found to improve the electronic conductivity of the material. Further improvement in the impedance of these materials is needed to meet the requirement for powering hybrid electric vehicle (HEV, <35 {Omega} cm2). In all materials, structural transformation from a layered to a spinel structure was not observed during electrochemical cycling. Cyclic voltammetry and X-ray photoelectron spectroscopy (XPS) data suggested that Ni and Mn exist as Ni{sup 2+} and Mn{sup 4+} in the layered structure. Differential scanning calorimetry (DSC) data showedmore » that exothermic peaks of fully charged Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'}{sub 2x})O{sub 2} appeared at higher temperature (270-290 C) than LiNiO{sub 2}-based cathode materials, which indicates that the thermal stability of Li(Ni{sub 0.5-x}Mn{sub 0.5-x}M'{sub 2x})O{sub 2} is better than those of LiNiO{sub 2}-based cathode materials.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
EE
OSTI Identifier:
949658
Report Number(s):
ANL/CMT/JA-43021
Journal ID: ISSN 0378-7753; JPSODZ; TRN: US201012%%439
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
J. Power Sources
Additional Journal Information:
Journal Volume: 112; Journal Issue: 1 ; Oct. 24, 2002; Journal ID: ISSN 0378-7753
Country of Publication:
United States
Language:
ENGLISH
Subject:
25 ENERGY STORAGE; CALORIMETRY; CAPACITY; CATHODES; COBALT; HYDROXIDES; IMPEDANCE; PRECURSOR; SPINELS; STABILITY; TRANSFORMATIONS; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Kang, S -H, Kim, J, Stoll, M E, Abraham, D, Sun, Y K, Amine, K, Chemical Engineering, and Hanyang Univ. Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'{sub 2x})O{sub 2} (M'=Co,Al, Ti;x=0,0.025) cathode materials for li-ion rechargeable batteries.. United States: N. p., 2002. Web. doi:10.1016/S0378-7753(02)00360-9.
Kang, S -H, Kim, J, Stoll, M E, Abraham, D, Sun, Y K, Amine, K, Chemical Engineering, & Hanyang Univ. Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'{sub 2x})O{sub 2} (M'=Co,Al, Ti;x=0,0.025) cathode materials for li-ion rechargeable batteries.. United States. https://doi.org/10.1016/S0378-7753(02)00360-9
Kang, S -H, Kim, J, Stoll, M E, Abraham, D, Sun, Y K, Amine, K, Chemical Engineering, and Hanyang Univ. 2002. "Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'{sub 2x})O{sub 2} (M'=Co,Al, Ti;x=0,0.025) cathode materials for li-ion rechargeable batteries.". United States. https://doi.org/10.1016/S0378-7753(02)00360-9.
@article{osti_949658,
title = {Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'{sub 2x})O{sub 2} (M'=Co,Al, Ti;x=0,0.025) cathode materials for li-ion rechargeable batteries.},
author = {Kang, S -H and Kim, J and Stoll, M E and Abraham, D and Sun, Y K and Amine, K and Chemical Engineering and Hanyang Univ.},
abstractNote = {Layered Li(Ni{sub 0.5-x}Mn{sub 0.5-x}M'{sub 2x})O{sub 2} materials (M'=Co, Al, Ti; x=0, 0.025) were synthesized using a manganese-nickel hydroxide precursor, and the effect of dopants on the electrochemical properties was investigated. Li(Ni0.5Mn0.5)O2 exhibited a discharge capacity of 120 mAh/g in the voltage range of 2.8-4.3 V with a slight capacity fade up to 40 cycles (0.09% per cycle); by doping of 5 mol% Co, Al, and Ti, the discharge capacities increased to 140, 142, and 132 mAh/g, respectively, and almost no capacity fading was observed. The cathode material containing 5 mol% Co had the lowest impedance, 47 {Omega} cm2, while undoped, Ti-doped, and Al-doped materials had impedance of 64, 62, and 99 {Omega} cm2, respectively. Unlike the other dopants, cobalt was found to improve the electronic conductivity of the material. Further improvement in the impedance of these materials is needed to meet the requirement for powering hybrid electric vehicle (HEV, <35 {Omega} cm2). In all materials, structural transformation from a layered to a spinel structure was not observed during electrochemical cycling. Cyclic voltammetry and X-ray photoelectron spectroscopy (XPS) data suggested that Ni and Mn exist as Ni{sup 2+} and Mn{sup 4+} in the layered structure. Differential scanning calorimetry (DSC) data showed that exothermic peaks of fully charged Li(Ni{sub 0.5-x}Mn{sub 0.5-xM'}{sub 2x})O{sub 2} appeared at higher temperature (270-290 C) than LiNiO{sub 2}-based cathode materials, which indicates that the thermal stability of Li(Ni{sub 0.5-x}Mn{sub 0.5-x}M'{sub 2x})O{sub 2} is better than those of LiNiO{sub 2}-based cathode materials.},
doi = {10.1016/S0378-7753(02)00360-9},
url = {https://www.osti.gov/biblio/949658}, journal = {J. Power Sources},
issn = {0378-7753},
number = 1 ; Oct. 24, 2002,
volume = 112,
place = {United States},
year = {2002},
month = {10}
}