Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors
Lithium-ion hybrid capacitors (LICs) possess the fascinating characteristics of both high power density and high energy density simultaneously. However, to design highly compatible cathode materials with a high capacity and anode materials with a high rate performance is still a major challenge beca...
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MDPI AG
2022-11-01
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| Series: | Nanoenergy Advances |
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| Online Access: | https://www.mdpi.com/2673-706X/2/4/16 |
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| author | Qing Wang Xin Jiang Qijun Tong Haijian Li Jie Li Weiqing Yang |
| author_facet | Qing Wang Xin Jiang Qijun Tong Haijian Li Jie Li Weiqing Yang |
| author_sort | Qing Wang |
| collection | DOAJ |
| description | Lithium-ion hybrid capacitors (LICs) possess the fascinating characteristics of both high power density and high energy density simultaneously. However, to design highly compatible cathode materials with a high capacity and anode materials with a high rate performance is still a major challenge because of the mismatch of dynamic mechanisms, greatly limiting the development of LICs. Herein, we report an N−doped porous carbon (N−PC) with a continuously interconnected network as the cathode, matching the dynamic mechanism of the uniquely pseudocapacitive T−Nb<sub>2</sub>O<sub>5</sub> anode without diffusion-controlled behavior. This heteroatom-grafting strategy of the cathode can effectively control the dynamic process to adjust the ion transport efficiency, shortening the gap of kinetics and capacity with the anode. For the energy storage application, the as-prepared N−PC cathode demonstrates an appreciable capacity of 62.06 mAh g<sup>−1</sup> under a high voltage window of 3 V to 4.2 V, which can exceed the capacity of 25.57 mAh g<sup>−1</sup> for porous carbon without heteroatom doping at the current density of 0.1 A g<sup>−1</sup>. Furthermore, the as-developed lithium-ion capacitor possesses an outstanding electrochemical performance (80.57 Wh kg<sup>−1</sup> at 135 W kg<sup>−1</sup> and 36.77 Wh kg<sup>−1</sup> at 2.7 kW kg<sup>−1</sup>). This work can provide a new avenue to design cathode materials with a highly appreciable capacity and highly compatible kinetic mechanism, further developing high-performance lithium-ion capacitors. |
| first_indexed | 2024-03-09T16:01:37Z |
| format | Article |
| id | doaj.art-b89dea6623444415a9d883e966aff9ab |
| institution | Directory Open Access Journal |
| issn | 2673-706X |
| language | English |
| last_indexed | 2024-03-09T16:01:37Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanoenergy Advances |
| spelling | doaj.art-b89dea6623444415a9d883e966aff9ab2023-11-24T17:02:48ZengMDPI AGNanoenergy Advances2673-706X2022-11-012430331510.3390/nanoenergyadv2040016Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion CapacitorsQing Wang0Xin Jiang1Qijun Tong2Haijian Li3Jie Li4Weiqing Yang5Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaJinshi Technology Co., Ltd., 289 Longquanyi District, Chengdu 610100, ChinaJinshi Technology Co., Ltd., 289 Longquanyi District, Chengdu 610100, ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaLithium-ion hybrid capacitors (LICs) possess the fascinating characteristics of both high power density and high energy density simultaneously. However, to design highly compatible cathode materials with a high capacity and anode materials with a high rate performance is still a major challenge because of the mismatch of dynamic mechanisms, greatly limiting the development of LICs. Herein, we report an N−doped porous carbon (N−PC) with a continuously interconnected network as the cathode, matching the dynamic mechanism of the uniquely pseudocapacitive T−Nb<sub>2</sub>O<sub>5</sub> anode without diffusion-controlled behavior. This heteroatom-grafting strategy of the cathode can effectively control the dynamic process to adjust the ion transport efficiency, shortening the gap of kinetics and capacity with the anode. For the energy storage application, the as-prepared N−PC cathode demonstrates an appreciable capacity of 62.06 mAh g<sup>−1</sup> under a high voltage window of 3 V to 4.2 V, which can exceed the capacity of 25.57 mAh g<sup>−1</sup> for porous carbon without heteroatom doping at the current density of 0.1 A g<sup>−1</sup>. Furthermore, the as-developed lithium-ion capacitor possesses an outstanding electrochemical performance (80.57 Wh kg<sup>−1</sup> at 135 W kg<sup>−1</sup> and 36.77 Wh kg<sup>−1</sup> at 2.7 kW kg<sup>−1</sup>). This work can provide a new avenue to design cathode materials with a highly appreciable capacity and highly compatible kinetic mechanism, further developing high-performance lithium-ion capacitors.https://www.mdpi.com/2673-706X/2/4/16lithium-ion hybrid capacitorsN−doped porous carboninterconnected networkelectrochemical performance |
| spellingShingle | Qing Wang Xin Jiang Qijun Tong Haijian Li Jie Li Weiqing Yang Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors Nanoenergy Advances lithium-ion hybrid capacitors N−doped porous carbon interconnected network electrochemical performance |
| title | Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors |
| title_full | Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors |
| title_fullStr | Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors |
| title_full_unstemmed | Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors |
| title_short | Continuously Interconnected N-Doped Porous Carbon for High-Performance Lithium-Ion Capacitors |
| title_sort | continuously interconnected n doped porous carbon for high performance lithium ion capacitors |
| topic | lithium-ion hybrid capacitors N−doped porous carbon interconnected network electrochemical performance |
| url | https://www.mdpi.com/2673-706X/2/4/16 |
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