Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance
Niobium dioxide (NbO2) features a high theoretical capacity and an outstanding electron conductivity, which makes it a promising alternative to the commercial graphite negative electrode. However, studies on NbO2 based lithium-ion battery negative electrodes have been rarely reported. In the pr...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2019
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| _version_ | 1824459293163782144 |
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| author | Ji, Q Gao, X Zhang, Q Jin, L Wang, D Xia, Y Yin, S Xia, S Hohn, N Zuo, X Wang, X Xie, S Xu, Z Ma, L Chen, L Chen, G Zhu, J Hu, B Müller-Buschbaum, P Bruce, PG Cheng, L |
| author_facet | Ji, Q Gao, X Zhang, Q Jin, L Wang, D Xia, Y Yin, S Xia, S Hohn, N Zuo, X Wang, X Xie, S Xu, Z Ma, L Chen, L Chen, G Zhu, J Hu, B Müller-Buschbaum, P Bruce, PG Cheng, L |
| author_sort | Ji, Q |
| collection | OXFORD |
| description | Niobium dioxide (NbO2) features a high theoretical capacity and an outstanding electron conductivity, which makes it a promising alternative to the commercial graphite negative electrode. However, studies on NbO2 based lithium-ion battery negative electrodes have been rarely reported. In the present work, NbO2 4 nanoparticles homogeneously embedded in carbon matrix are synthesized using a dental resin monomer (bisphenol A glycidyl dimethacrylate, Bis-GMA) as solvent and carbon source and niobium ethoxide (NbETO) as the precursor. Thermal polymerization and calcination under Ar/H2 atmosphere at 900 °C are applied, to synthesize the NbO2/carbon nanohybrid in a facile scalable way. It is revealed that a low Bis-GMA/NbETO mass ratio (from 1:1 to 1:2) enables the conversion of Nb (V) to Nb (IV) due to increased porosity induced by alcoholysis reaction between the NbETO and Bis-GMA. The fundamental mechanisms responsible for the formation of NbO2 are elaborated, which involve the reduction of Nb (V) by in situ generated carbon monoxide. The as-prepared NbO2/carbon nanohybrid delivers a reversible capacity of 225 mA h g-1 after 500 cycles at 1 C rate with the Coulombic efficiency of more than 99.4 % in the cycles. Various experimental and theoretical approaches including solid state NMR, ex situ XRD, differential electrochemical mass spectrometry, and density functional theory (DFT) are utilized to understand the fundamental lithiation/delithiation mechanisms of the NbO2/carbon nanohybrid. The results suggest that the NbO2/carbon nanohybrid bearing high capacity, long cycle life and low gas-evolution is promising for lithium storage applications. |
| first_indexed | 2024-03-06T23:01:35Z |
| format | Journal article |
| id | oxford-uuid:624f8e84-fd17-4170-8a12-cdacec0e94c4 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2025-02-19T04:39:29Z |
| publishDate | 2019 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:624f8e84-fd17-4170-8a12-cdacec0e94c42025-02-17T12:11:31ZDental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performanceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:624f8e84-fd17-4170-8a12-cdacec0e94c4EnglishSymplectic Elements at OxfordWiley2019Ji, QGao, XZhang, QJin, LWang, DXia, YYin, SXia, SHohn, NZuo, XWang, XXie, SXu, ZMa, LChen, LChen, GZhu, JHu, BMüller-Buschbaum, PBruce, PGCheng, L Niobium dioxide (NbO2) features a high theoretical capacity and an outstanding electron conductivity, which makes it a promising alternative to the commercial graphite negative electrode. However, studies on NbO2 based lithium-ion battery negative electrodes have been rarely reported. In the present work, NbO2 4 nanoparticles homogeneously embedded in carbon matrix are synthesized using a dental resin monomer (bisphenol A glycidyl dimethacrylate, Bis-GMA) as solvent and carbon source and niobium ethoxide (NbETO) as the precursor. Thermal polymerization and calcination under Ar/H2 atmosphere at 900 °C are applied, to synthesize the NbO2/carbon nanohybrid in a facile scalable way. It is revealed that a low Bis-GMA/NbETO mass ratio (from 1:1 to 1:2) enables the conversion of Nb (V) to Nb (IV) due to increased porosity induced by alcoholysis reaction between the NbETO and Bis-GMA. The fundamental mechanisms responsible for the formation of NbO2 are elaborated, which involve the reduction of Nb (V) by in situ generated carbon monoxide. The as-prepared NbO2/carbon nanohybrid delivers a reversible capacity of 225 mA h g-1 after 500 cycles at 1 C rate with the Coulombic efficiency of more than 99.4 % in the cycles. Various experimental and theoretical approaches including solid state NMR, ex situ XRD, differential electrochemical mass spectrometry, and density functional theory (DFT) are utilized to understand the fundamental lithiation/delithiation mechanisms of the NbO2/carbon nanohybrid. The results suggest that the NbO2/carbon nanohybrid bearing high capacity, long cycle life and low gas-evolution is promising for lithium storage applications. |
| spellingShingle | Ji, Q Gao, X Zhang, Q Jin, L Wang, D Xia, Y Yin, S Xia, S Hohn, N Zuo, X Wang, X Xie, S Xu, Z Ma, L Chen, L Chen, G Zhu, J Hu, B Müller-Buschbaum, P Bruce, PG Cheng, L Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance |
| title | Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance |
| title_full | Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance |
| title_fullStr | Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance |
| title_full_unstemmed | Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance |
| title_short | Dental resin monomer enables unique NbO2/carbon lithium-ion battery negative electrode with exceptional performance |
| title_sort | dental resin monomer enables unique nbo2 carbon lithium ion battery negative electrode with exceptional performance |
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