A phase transformation route to porous 2D Mn3O4 nanosheets with promising anode performance for Li-ion batteries

Nutpaphat Jarulertwathana; Xiaoyan Jin; Seong Ju Hwang

doi:10.1007/s42247-019-00058-0

A phase transformation route to porous 2D Mn₃O₄ nanosheets with promising anode performance for Li-ion batteries

Nutpaphat Jarulertwathana, Xiaoyan Jin, Seong Ju Hwang

Department of Materials Science and Engineering

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

4 Citations (Scopus)

Abstract

A phase transformation route to porous 2D Mn₃O₄ nanosheets is developed by heat treatment of exfoliated layered MnO₂ nanosheets. The calcination of MnO₂ nanosheets at an elevated temperature of ≥ 500 °C in Ar atmosphere leads to the formation of porous 2D nanosheets as well as to reductive phase transition to low-valent Mn₃O₄. The formation of spinel-structured Mn₃O₄ phase with mixed tetrahedral and octahedral local symmetries is obviously evidenced by micro-Raman and X-ray absorption spectroscopies. An elevation of heating temperature enlarges the surface pore of 2D nanosheet and lowers the average oxidation state of Mn ion. In comparison with Mn₃O₄ crystal, the porous 2D Mn₃O₄ nanosheets show higher electrode activities for lithium ion batteries (LIBs) with larger discharge capacities, better rate characteristics, and excellent cyclabilities, emphasizing the advantage of porous 2D nanosheet morphology in optimizing the electrode functionality of metal oxide. The present study underscores the validity of the present phase transformation route in exploring novel high-performance metal oxide–based LIB electrode materials.

Original language	English
Pages (from-to)	487-494
Number of pages	8
Journal	Emergent Materials
Volume	2
Issue number	4
DOIs	https://doi.org/10.1007/s42247-019-00058-0
Publication status	Published - 2019 Dec

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2017R1A2A1A17069463) and by the Korea government (MSIT) (No. NRF-2017R1A5A1015365). The experiments at PAL were supported in part by MOST and POSTECH.

Publisher Copyright:
© 2019, Qatar University and Springer Nature Switzerland AG.

All Science Journal Classification (ASJC) codes

Biomaterials
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal
Ceramics and Composites

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s42247-019-00058-0

Cite this

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title = "A phase transformation route to porous 2D Mn3O4 nanosheets with promising anode performance for Li-ion batteries",

abstract = "A phase transformation route to porous 2D Mn3O4 nanosheets is developed by heat treatment of exfoliated layered MnO2 nanosheets. The calcination of MnO2 nanosheets at an elevated temperature of ≥ 500 °C in Ar atmosphere leads to the formation of porous 2D nanosheets as well as to reductive phase transition to low-valent Mn3O4. The formation of spinel-structured Mn3O4 phase with mixed tetrahedral and octahedral local symmetries is obviously evidenced by micro-Raman and X-ray absorption spectroscopies. An elevation of heating temperature enlarges the surface pore of 2D nanosheet and lowers the average oxidation state of Mn ion. In comparison with Mn3O4 crystal, the porous 2D Mn3O4 nanosheets show higher electrode activities for lithium ion batteries (LIBs) with larger discharge capacities, better rate characteristics, and excellent cyclabilities, emphasizing the advantage of porous 2D nanosheet morphology in optimizing the electrode functionality of metal oxide. The present study underscores the validity of the present phase transformation route in exploring novel high-performance metal oxide–based LIB electrode materials.",

author = "Nutpaphat Jarulertwathana and Xiaoyan Jin and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2017R1A2A1A17069463) and by the Korea government (MSIT) (No. NRF-2017R1A5A1015365). The experiments at PAL were supported in part by MOST and POSTECH. Publisher Copyright: {\textcopyright} 2019, Qatar University and Springer Nature Switzerland AG.",

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N2 - A phase transformation route to porous 2D Mn3O4 nanosheets is developed by heat treatment of exfoliated layered MnO2 nanosheets. The calcination of MnO2 nanosheets at an elevated temperature of ≥ 500 °C in Ar atmosphere leads to the formation of porous 2D nanosheets as well as to reductive phase transition to low-valent Mn3O4. The formation of spinel-structured Mn3O4 phase with mixed tetrahedral and octahedral local symmetries is obviously evidenced by micro-Raman and X-ray absorption spectroscopies. An elevation of heating temperature enlarges the surface pore of 2D nanosheet and lowers the average oxidation state of Mn ion. In comparison with Mn3O4 crystal, the porous 2D Mn3O4 nanosheets show higher electrode activities for lithium ion batteries (LIBs) with larger discharge capacities, better rate characteristics, and excellent cyclabilities, emphasizing the advantage of porous 2D nanosheet morphology in optimizing the electrode functionality of metal oxide. The present study underscores the validity of the present phase transformation route in exploring novel high-performance metal oxide–based LIB electrode materials.

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