Controlling MoO2 and MoO3 phases in MoOx/CNTs nanocomposites and their application to anode materials for lithium-ion batteries and capacitors
Abstract
Molybdenum oxides (MoO2 and MoO3) are attractive anode materials for Li- and Na- ion batteries. Although there have been extensive studies on them individually, systematic and comparative studies are still lacking. Here, we demonstrate a facile and straightforward synthesis method to control the phase and oxidation state in the MoOx/CNTs nanocomposites via hydrothermal reaction followed by heat-treatment. By changing the gas atmosphere during the annealing process, well-dispersed MoO2/CNTs and MoO3/CNTs nanocomposites are formed without altering their overall morphology. This strategy enables us to investigate the true structure-property correlation of MoOx/CNTs nanocomposites by comparing the structure and electrochemical properties of MoO2/CNTs and MoO3/CNTs. When tested as anode materials for lithium-ion batteries, both HT-MoO2&3/CNTs electrodes show much-improved cycling stability and rate performance compared to the rod-shaped bulk MoO3 electrode. In situ Mo K-edge x-ray absorption spectroscopy (XAS) has been further employed to compare and elucidate Li+ storage mechanisms of both electrodes. When employed to the negative electrode of a high-power lithium-ion capacitor (LIC), the LIC full-cell composed of HT-MoO3/CNTs negative and activated carbon positive electrodes demonstrates impressive energy and power densities (~ 90 Wh kg–1 with 2000 W kg–1) and excellent cycling stability (96.8 % capacity retention after 300 cycles), revealing themore »
- Authors:
-
[2];
[1]
- Dongguk Univ., Seoul (Korea, Republic of)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Div.
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Research Foundation of Korea (NRF); Ministry of Trade, Industry & Energy (MOTIE); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1809062
- Alternate Identifier(s):
- OSTI ID: 1811465; OSTI ID: 1815148
- Report Number(s):
- BNL-221837-2021-JAAM; BNL-221948-2021-JAAM
Journal ID: ISSN 0013-4686
- Grant/Contract Number:
- SC0012704; 2019R1A2C1007922; 20012318
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Electrochimica Acta
- Additional Journal Information:
- Journal Volume: 388; Journal ID: ISSN 0013-4686
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; molybdenum oxide; MoO2; MoO3; x-ray absorption spectroscopy; Li-ion capacitor
Citation Formats
Han, Daseul, Hwang, Sooyeon, Bak, Seong-Min, and Nam, Kyung-Wan. Controlling MoO2 and MoO3 phases in MoOx/CNTs nanocomposites and their application to anode materials for lithium-ion batteries and capacitors. United States: N. p., 2021.
Web. doi:10.1016/j.electacta.2021.138635.
Han, Daseul, Hwang, Sooyeon, Bak, Seong-Min, & Nam, Kyung-Wan. Controlling MoO2 and MoO3 phases in MoOx/CNTs nanocomposites and their application to anode materials for lithium-ion batteries and capacitors. United States. https://doi.org/10.1016/j.electacta.2021.138635
Han, Daseul, Hwang, Sooyeon, Bak, Seong-Min, and Nam, Kyung-Wan. Thu .
"Controlling MoO2 and MoO3 phases in MoOx/CNTs nanocomposites and their application to anode materials for lithium-ion batteries and capacitors". United States. https://doi.org/10.1016/j.electacta.2021.138635. https://www.osti.gov/servlets/purl/1809062.
@article{osti_1809062,
title = {Controlling MoO2 and MoO3 phases in MoOx/CNTs nanocomposites and their application to anode materials for lithium-ion batteries and capacitors},
author = {Han, Daseul and Hwang, Sooyeon and Bak, Seong-Min and Nam, Kyung-Wan},
abstractNote = {Molybdenum oxides (MoO2 and MoO3) are attractive anode materials for Li- and Na- ion batteries. Although there have been extensive studies on them individually, systematic and comparative studies are still lacking. Here, we demonstrate a facile and straightforward synthesis method to control the phase and oxidation state in the MoOx/CNTs nanocomposites via hydrothermal reaction followed by heat-treatment. By changing the gas atmosphere during the annealing process, well-dispersed MoO2/CNTs and MoO3/CNTs nanocomposites are formed without altering their overall morphology. This strategy enables us to investigate the true structure-property correlation of MoOx/CNTs nanocomposites by comparing the structure and electrochemical properties of MoO2/CNTs and MoO3/CNTs. When tested as anode materials for lithium-ion batteries, both HT-MoO2&3/CNTs electrodes show much-improved cycling stability and rate performance compared to the rod-shaped bulk MoO3 electrode. In situ Mo K-edge x-ray absorption spectroscopy (XAS) has been further employed to compare and elucidate Li+ storage mechanisms of both electrodes. When employed to the negative electrode of a high-power lithium-ion capacitor (LIC), the LIC full-cell composed of HT-MoO3/CNTs negative and activated carbon positive electrodes demonstrates impressive energy and power densities (~ 90 Wh kg–1 with 2000 W kg–1) and excellent cycling stability (96.8 % capacity retention after 300 cycles), revealing the versatility of the MoOx/CNTs electrodes in energy applications.},
doi = {10.1016/j.electacta.2021.138635},
journal = {Electrochimica Acta},
number = ,
volume = 388,
place = {United States},
year = {Thu May 20 00:00:00 EDT 2021},
month = {Thu May 20 00:00:00 EDT 2021}
}
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