Electrochemical and rate performance study of high-voltage lithium-rich composition: Li1.2Mn0.525Ni0.175Co 0.1O2

Surendra K. Martha; Jagjit Nanda; Gabriel M. Veith; Nancy J. Dudney

doi:10.1016/j.jpowsour.2011.10.019

Electrochemical and rate performance study of high-voltage lithium-rich composition: Li_1.2Mn_0.525Ni_0.175Co _0.1O₂

Surendra K. Martha, Jagjit Nanda, Gabriel M. Veith, Nancy J. Dudney

Energy Storage & Conversion

Research output: Contribution to journal › Article › peer-review

226 Scopus citations

Abstract

We report electrochemical studies of high voltage cathodes composed of lithium rich "layered-layered" material having the nominal composition Li_1.2Mn_0.525Ni_0.175Co_0.1O ₂, or equivalently 0.6Li[Li_1/3Mn_2/3]O ₂-0.4Li[Mn_0.3Ni_0.45Co_0.25]O ₂. These aspects were investigated by cyclic voltammetry studies in conjunction with electrochemical impedance spectroscopy measurements to understand the redox reactions involving multiple transition metals and their capacity contribution at higher voltages, up to 4.9 V. Further, cathodes with 1.5 wt.% carbon nanofibers added to the Li_1.2Mn _0.525Ni_0.175Co_0.1O₂ composite electrode showed stable reversible capacities of about 280 mAh g^-1 when cycled to 4.9 V for more than 100 cycles, and almost a factor of two improvements in the rate performance compared to the electrode composition prepared using conventional composition (7.5% carbon black and 7.5% binder).

Original language	English
Pages (from-to)	220-226
Number of pages	7
Journal	Journal of Power Sources
Volume	199
DOIs	https://doi.org/10.1016/j.jpowsour.2011.10.019
State	Published - Feb 1 2012

Funding

Materials used in this study were supplied courtesy of Max L. Lake (Applied Sciences, Inc.), carbon nano fibers and Toda Materials Corporation, Japan for the lithium rich MNC composition. This work is funded by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy . GMV acknowledges support from the Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy . Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract no. DE-AC05-00OR22725.

Keywords

Carbon nanofiber
Cathode material
Lithium battery
Rate performance

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10.1016/j.jpowsour.2011.10.019

Cite this

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title = "Electrochemical and rate performance study of high-voltage lithium-rich composition: Li1.2Mn0.525Ni0.175Co 0.1O2",

abstract = "We report electrochemical studies of high voltage cathodes composed of lithium rich {"}layered-layered{"} material having the nominal composition Li1.2Mn0.525Ni0.175Co0.1O 2, or equivalently 0.6Li[Li1/3Mn2/3]O 2-0.4Li[Mn0.3Ni0.45Co0.25]O 2. These aspects were investigated by cyclic voltammetry studies in conjunction with electrochemical impedance spectroscopy measurements to understand the redox reactions involving multiple transition metals and their capacity contribution at higher voltages, up to 4.9 V. Further, cathodes with 1.5 wt.% carbon nanofibers added to the Li1.2Mn 0.525Ni0.175Co0.1O2 composite electrode showed stable reversible capacities of about 280 mAh g-1 when cycled to 4.9 V for more than 100 cycles, and almost a factor of two improvements in the rate performance compared to the electrode composition prepared using conventional composition (7.5% carbon black and 7.5% binder).",

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author = "Martha, {Surendra K.} and Jagjit Nanda and Veith, {Gabriel M.} and Dudney, {Nancy J.}",

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AU - Veith, Gabriel M.

AU - Dudney, Nancy J.

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N2 - We report electrochemical studies of high voltage cathodes composed of lithium rich "layered-layered" material having the nominal composition Li1.2Mn0.525Ni0.175Co0.1O 2, or equivalently 0.6Li[Li1/3Mn2/3]O 2-0.4Li[Mn0.3Ni0.45Co0.25]O 2. These aspects were investigated by cyclic voltammetry studies in conjunction with electrochemical impedance spectroscopy measurements to understand the redox reactions involving multiple transition metals and their capacity contribution at higher voltages, up to 4.9 V. Further, cathodes with 1.5 wt.% carbon nanofibers added to the Li1.2Mn 0.525Ni0.175Co0.1O2 composite electrode showed stable reversible capacities of about 280 mAh g-1 when cycled to 4.9 V for more than 100 cycles, and almost a factor of two improvements in the rate performance compared to the electrode composition prepared using conventional composition (7.5% carbon black and 7.5% binder).

AB - We report electrochemical studies of high voltage cathodes composed of lithium rich "layered-layered" material having the nominal composition Li1.2Mn0.525Ni0.175Co0.1O 2, or equivalently 0.6Li[Li1/3Mn2/3]O 2-0.4Li[Mn0.3Ni0.45Co0.25]O 2. These aspects were investigated by cyclic voltammetry studies in conjunction with electrochemical impedance spectroscopy measurements to understand the redox reactions involving multiple transition metals and their capacity contribution at higher voltages, up to 4.9 V. Further, cathodes with 1.5 wt.% carbon nanofibers added to the Li1.2Mn 0.525Ni0.175Co0.1O2 composite electrode showed stable reversible capacities of about 280 mAh g-1 when cycled to 4.9 V for more than 100 cycles, and almost a factor of two improvements in the rate performance compared to the electrode composition prepared using conventional composition (7.5% carbon black and 7.5% binder).

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