A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries
Transition metal oxides are considered promising anode materials for high performance flexible electrodes due to their abundant reserves and excellent specific capacity. However, their inherent low conductivity, large volume effect, and poor cycling performance limit their applications. Herein, we r...
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MDPI AG
2024-12-01
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| Series: | Molecules |
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| author | Heying Chu Jingchuan Zhang Pengsen Zhao Yong Li Zhaoxia Liu Hongzhou Zhang |
| author_facet | Heying Chu Jingchuan Zhang Pengsen Zhao Yong Li Zhaoxia Liu Hongzhou Zhang |
| author_sort | Heying Chu |
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| description | Transition metal oxides are considered promising anode materials for high performance flexible electrodes due to their abundant reserves and excellent specific capacity. However, their inherent low conductivity, large volume effect, and poor cycling performance limit their applications. Herein, we report a novel “spontaneous complexation and exfoliation” strategy for the fabrication of flexible MnO NCs@rGO thin-film electrodes, which overcomes the aforementioned drawbacks and pushes the mechanical flexibility and lithium-ion (Li<sup>+</sup>) storage performance to a higher level. The combination of large-area few-layer reduced graphene oxide (rGO) films and ultrafine MnO nanocrystals (MnO NCs) provides a high density of electrochemical active sites. Notably, the layer-by-layer embedded structure not only enables the MnO NCs@rGO electrodes to withstand various mechanical deformations but also produces a strong synergistic effect of enhanced reaction kinetics by providing an enlarged electrode/electrolyte contact area and reduced electron/ion transport resistance. The elaborately designed flexible MnO NCs@rGO anode provides a specific capacity of about 1220 mAh g<sup>−1</sup> over 1000 cycles, remarkable high-rate capacity (50.0 A g<sup>−1</sup>), and exceptional cycling stability. Finally, the assembled flexible lithium-ion full cells achieve zero capacity loss during repeated large-angle bending, demonstrating immense potential as a high-performance flexible energy storage device. This work provides valuable insights into unique structural designs for durable and ultra-fast lithium ion batteries. |
| format | Article |
| id | doaj-art-d4aef742b08847ebb2215f4e5cb4f0b7 |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Molecules |
| spelling | doaj-art-d4aef742b08847ebb2215f4e5cb4f0b72025-01-10T13:18:58ZengMDPI AGMolecules1420-30492024-12-0130113310.3390/molecules30010133A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion BatteriesHeying Chu0Jingchuan Zhang1Pengsen Zhao2Yong Li3Zhaoxia Liu4Hongzhou Zhang5College of Mechanical and Electronic Engineering, Tarim University, Alar 843300, ChinaCollege of Mechanical and Electronic Engineering, Tarim University, Alar 843300, ChinaCollege of Mechanical and Electronic Engineering, Tarim University, Alar 843300, ChinaCollege of Mechanical and Electronic Engineering, Tarim University, Alar 843300, ChinaCollege of Mechanical and Electronic Engineering, Wuhan Donghu University, Wuhan 430017, ChinaCollege of Mechanical and Electronic Engineering, Tarim University, Alar 843300, ChinaTransition metal oxides are considered promising anode materials for high performance flexible electrodes due to their abundant reserves and excellent specific capacity. However, their inherent low conductivity, large volume effect, and poor cycling performance limit their applications. Herein, we report a novel “spontaneous complexation and exfoliation” strategy for the fabrication of flexible MnO NCs@rGO thin-film electrodes, which overcomes the aforementioned drawbacks and pushes the mechanical flexibility and lithium-ion (Li<sup>+</sup>) storage performance to a higher level. The combination of large-area few-layer reduced graphene oxide (rGO) films and ultrafine MnO nanocrystals (MnO NCs) provides a high density of electrochemical active sites. Notably, the layer-by-layer embedded structure not only enables the MnO NCs@rGO electrodes to withstand various mechanical deformations but also produces a strong synergistic effect of enhanced reaction kinetics by providing an enlarged electrode/electrolyte contact area and reduced electron/ion transport resistance. The elaborately designed flexible MnO NCs@rGO anode provides a specific capacity of about 1220 mAh g<sup>−1</sup> over 1000 cycles, remarkable high-rate capacity (50.0 A g<sup>−1</sup>), and exceptional cycling stability. Finally, the assembled flexible lithium-ion full cells achieve zero capacity loss during repeated large-angle bending, demonstrating immense potential as a high-performance flexible energy storage device. This work provides valuable insights into unique structural designs for durable and ultra-fast lithium ion batteries.https://www.mdpi.com/1420-3049/30/1/133flexible electrodefree-standingspontaneous complexation and exfoliationlayer-embedded structurehigh ratelithium-ion batteries |
| spellingShingle | Heying Chu Jingchuan Zhang Pengsen Zhao Yong Li Zhaoxia Liu Hongzhou Zhang A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries Molecules flexible electrode free-standing spontaneous complexation and exfoliation layer-embedded structure high rate lithium-ion batteries |
| title | A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries |
| title_full | A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries |
| title_fullStr | A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries |
| title_full_unstemmed | A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries |
| title_short | A Spontaneous Complexation–Exfoliation Strategy for a Flexible Anode Towards Superior Durable and Ultrafast Lithium-Ion Batteries |
| title_sort | spontaneous complexation exfoliation strategy for a flexible anode towards superior durable and ultrafast lithium ion batteries |
| topic | flexible electrode free-standing spontaneous complexation and exfoliation layer-embedded structure high rate lithium-ion batteries |
| url | https://www.mdpi.com/1420-3049/30/1/133 |
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