Mechanochemical synthesis of Li2MnO3 Shell/LiMO 2 (M = Ni, Co, Mn) core-structured nanocomposites for lithium-ion batteries

Jae Kyo Noh; Soo Kim; Haesik Kim; Wonchang Choi; Wonyoung Chang; Dongjin Byun; Byung Won Cho; Kyung Yoon Chung

doi:10.1038/srep04847

Mechanochemical synthesis of Li₂MnO₃ Shell/LiMO ₂ (M = Ni, Co, Mn) core-structured nanocomposites for lithium-ion batteries

Jae Kyo Noh, Soo Kim, Haesik Kim, Wonchang Choi, Wonyoung Chang, Dongjin Byun, Byung Won Cho, Kyung Yoon Chung

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

50 Citations (Scopus)

Abstract

Core/shell-like nanostructured xLi₂MnO₃·(1 - x)LiMO₂ (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO₂ core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li ₂MnO₃ shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO₂. In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi ₂MnO₃·(1 - x)LiMO₂ nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li₂MnO₃ shell is effective in stabilizing the LiMO₂ core at high temperatures, making the nanocomposites highly suitable from a safety viewpoint.

Original language	English
Article number	4847
Journal	Scientific reports
Volume	4
DOIs	https://doi.org/10.1038/srep04847
Publication status	Published - 2014 May 2

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-2011-C1AAA001-0030538). This work was also supported by the KIST Institutional Program (Project No. 2E24663).

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Cite this

@article{7fd1ccdcdb7e446bb5e1c8fe1c90aa84,

title = "Mechanochemical synthesis of Li2MnO3 Shell/LiMO 2 (M = Ni, Co, Mn) core-structured nanocomposites for lithium-ion batteries",

abstract = "Core/shell-like nanostructured xLi2MnO3·(1 - x)LiMO2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li 2MnO3 shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO2. In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi 2MnO3·(1 - x)LiMO2 nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li2MnO3 shell is effective in stabilizing the LiMO2 core at high temperatures, making the nanocomposites highly suitable from a safety viewpoint.",

author = "Noh, {Jae Kyo} and Soo Kim and Haesik Kim and Wonchang Choi and Wonyoung Chang and Dongjin Byun and Cho, {Byung Won} and Chung, {Kyung Yoon}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-2011-C1AAA001-0030538). This work was also supported by the KIST Institutional Program (Project No. 2E24663).",

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T1 - Mechanochemical synthesis of Li2MnO3 Shell/LiMO 2 (M = Ni, Co, Mn) core-structured nanocomposites for lithium-ion batteries

AU - Noh, Jae Kyo

AU - Kim, Soo

AU - Kim, Haesik

AU - Choi, Wonchang

AU - Chang, Wonyoung

AU - Byun, Dongjin

AU - Cho, Byung Won

AU - Chung, Kyung Yoon

N1 - Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-2011-C1AAA001-0030538). This work was also supported by the KIST Institutional Program (Project No. 2E24663).

PY - 2014/5/2

Y1 - 2014/5/2

N2 - Core/shell-like nanostructured xLi2MnO3·(1 - x)LiMO2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li 2MnO3 shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO2. In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi 2MnO3·(1 - x)LiMO2 nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li2MnO3 shell is effective in stabilizing the LiMO2 core at high temperatures, making the nanocomposites highly suitable from a safety viewpoint.

AB - Core/shell-like nanostructured xLi2MnO3·(1 - x)LiMO2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li 2MnO3 shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO2. In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi 2MnO3·(1 - x)LiMO2 nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li2MnO3 shell is effective in stabilizing the LiMO2 core at high temperatures, making the nanocomposites highly suitable from a safety viewpoint.

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