Superior role of MXene nanosheet as hybridization matrix over graphene in enhancing interfacial electronic coupling and functionalities of metal oxide

Xiaoyan Jin; Seung Jae Shin; Najin Kim; Bohyun Kang; Huiyan Piao; Jin Ho Choy; Hyungjun Kim; Seong Ju Hwang

doi:10.1016/j.nanoen.2018.09.055

Superior role of MXene nanosheet as hybridization matrix over graphene in enhancing interfacial electronic coupling and functionalities of metal oxide

Xiaoyan Jin, Seung Jae Shin, Najin Kim, Bohyun Kang, Huiyan Piao, Jin Ho Choy, Hyungjun Kim, Seong Ju Hwang

Department of Materials Science and Engineering

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

31 Citations (Scopus)

Abstract

A superior efficiency of MXene (Ti₃C₂) nanosheet as a hybridization matrix over graphene is evidenced by comparative investigation on uniformly-stacked MnO₂–Ti₃C₂ and MnO₂–reduced graphene oxide (rGO) nanohybrids. Density functional theory calculation and spectroscopic analyses demonstrate a stronger interfacial electronic coupling and greater charge transfer of polar MnO₂ with hydrophilic Ti₃C₂ nanosheet than with hydrophobic rGO one, which maximizes the hybridization effect with the conductive nanosheet. Also, hybridization with Ti₃C₂ nanosheet is more effective in enhancing the ion diffusivity and porosity of MnO₂ than that with strongly self-stacking rGO, which is attributable to weaker self-stacking tendency of Ti₃C₂. Due to these hybridization effects, the MnO₂–Ti₃C₂ nanohybrid delivers larger specific capacitance with improved rate performance than does the MnO₂–rGO nanohybrid, underscoring higher efficiency of MXene hybridization in improving electrode performance. This study clearly demonstrates that exfoliated MXene nanosheet can act as a superior hybridization matrix over rGO to explore strongly-coupled nanohybrids with improved energy-related functionality.

Original language	English
Pages (from-to)	841-848
Number of pages	8
Journal	Nano Energy
Volume	53
DOIs	https://doi.org/10.1016/j.nanoen.2018.09.055
Publication status	Published - 2018 Nov

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. The authors express special thanks for Prof. Yury Gogotsi and Dr. Babak Anasori (Drexel Univ.) for providing the pristine MXene materials and insightful discussion.

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 . The authors express special thanks for Prof. Yury Gogotsi and Dr. Babak Anasori (Drexel Univ.) for providing the pristine MXene materials and insightful discussion.

Publisher Copyright:
© 2018 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrical and Electronic Engineering

UN SDGs

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

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10.1016/j.nanoen.2018.09.055

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@article{114eb5e69cfc48e69336c30ffda44f39,

title = "Superior role of MXene nanosheet as hybridization matrix over graphene in enhancing interfacial electronic coupling and functionalities of metal oxide",

abstract = "A superior efficiency of MXene (Ti3C2) nanosheet as a hybridization matrix over graphene is evidenced by comparative investigation on uniformly-stacked MnO2–Ti3C2 and MnO2–reduced graphene oxide (rGO) nanohybrids. Density functional theory calculation and spectroscopic analyses demonstrate a stronger interfacial electronic coupling and greater charge transfer of polar MnO2 with hydrophilic Ti3C2 nanosheet than with hydrophobic rGO one, which maximizes the hybridization effect with the conductive nanosheet. Also, hybridization with Ti3C2 nanosheet is more effective in enhancing the ion diffusivity and porosity of MnO2 than that with strongly self-stacking rGO, which is attributable to weaker self-stacking tendency of Ti3C2. Due to these hybridization effects, the MnO2–Ti3C2 nanohybrid delivers larger specific capacitance with improved rate performance than does the MnO2–rGO nanohybrid, underscoring higher efficiency of MXene hybridization in improving electrode performance. This study clearly demonstrates that exfoliated MXene nanosheet can act as a superior hybridization matrix over rGO to explore strongly-coupled nanohybrids with improved energy-related functionality.",

author = "Xiaoyan Jin and Shin, {Seung Jae} and Najin Kim and Bohyun Kang and Huiyan Piao and Choy, {Jin Ho} and Hyungjun Kim 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. The authors express special thanks for Prof. Yury Gogotsi and Dr. Babak Anasori (Drexel Univ.) for providing the pristine MXene materials and insightful discussion. 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 . The authors express special thanks for Prof. Yury Gogotsi and Dr. Babak Anasori (Drexel Univ.) for providing the pristine MXene materials and insightful discussion. Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = nov,

doi = "10.1016/j.nanoen.2018.09.055",

language = "English",

volume = "53",

pages = "841--848",

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T1 - Superior role of MXene nanosheet as hybridization matrix over graphene in enhancing interfacial electronic coupling and functionalities of metal oxide

AU - Jin, Xiaoyan

AU - Shin, Seung Jae

AU - Kim, Najin

AU - Kang, Bohyun

AU - Piao, Huiyan

AU - Choy, Jin Ho

AU - Kim, Hyungjun

AU - Hwang, Seong Ju

N1 - 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. The authors express special thanks for Prof. Yury Gogotsi and Dr. Babak Anasori (Drexel Univ.) for providing the pristine MXene materials and insightful discussion. 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 . The authors express special thanks for Prof. Yury Gogotsi and Dr. Babak Anasori (Drexel Univ.) for providing the pristine MXene materials and insightful discussion. Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/11

Y1 - 2018/11

N2 - A superior efficiency of MXene (Ti3C2) nanosheet as a hybridization matrix over graphene is evidenced by comparative investigation on uniformly-stacked MnO2–Ti3C2 and MnO2–reduced graphene oxide (rGO) nanohybrids. Density functional theory calculation and spectroscopic analyses demonstrate a stronger interfacial electronic coupling and greater charge transfer of polar MnO2 with hydrophilic Ti3C2 nanosheet than with hydrophobic rGO one, which maximizes the hybridization effect with the conductive nanosheet. Also, hybridization with Ti3C2 nanosheet is more effective in enhancing the ion diffusivity and porosity of MnO2 than that with strongly self-stacking rGO, which is attributable to weaker self-stacking tendency of Ti3C2. Due to these hybridization effects, the MnO2–Ti3C2 nanohybrid delivers larger specific capacitance with improved rate performance than does the MnO2–rGO nanohybrid, underscoring higher efficiency of MXene hybridization in improving electrode performance. This study clearly demonstrates that exfoliated MXene nanosheet can act as a superior hybridization matrix over rGO to explore strongly-coupled nanohybrids with improved energy-related functionality.

AB - A superior efficiency of MXene (Ti3C2) nanosheet as a hybridization matrix over graphene is evidenced by comparative investigation on uniformly-stacked MnO2–Ti3C2 and MnO2–reduced graphene oxide (rGO) nanohybrids. Density functional theory calculation and spectroscopic analyses demonstrate a stronger interfacial electronic coupling and greater charge transfer of polar MnO2 with hydrophilic Ti3C2 nanosheet than with hydrophobic rGO one, which maximizes the hybridization effect with the conductive nanosheet. Also, hybridization with Ti3C2 nanosheet is more effective in enhancing the ion diffusivity and porosity of MnO2 than that with strongly self-stacking rGO, which is attributable to weaker self-stacking tendency of Ti3C2. Due to these hybridization effects, the MnO2–Ti3C2 nanohybrid delivers larger specific capacitance with improved rate performance than does the MnO2–rGO nanohybrid, underscoring higher efficiency of MXene hybridization in improving electrode performance. This study clearly demonstrates that exfoliated MXene nanosheet can act as a superior hybridization matrix over rGO to explore strongly-coupled nanohybrids with improved energy-related functionality.

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SN - 2211-2855

VL - 53

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JO - Nano Energy

JF - Nano Energy

ER -

Superior role of MXene nanosheet as hybridization matrix over graphene in enhancing interfacial electronic coupling and functionalities of metal oxide

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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