KMS Shanghai Institute of Ceramics，Chinese Academy of Sciences
| Vertically self-standing C@NiCo2O4 nanoneedle arrays as effective binder-free cathodes for rechargeable Na-O-2 batteries | |
| Liu, Yunzhao; Chi, Xiaowei; Han, Qi; Du, Yuexiu; Yang, Jianhua; Liu, Yu | |
| 2019-01-25 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 772Pages:693 |
| Subtype | Article |
| Abstract | Sodium-oxygen (Na-O-2) batteries are being extensively studied because of their higher energy efficiency and lower cost compared to those of lithium-oxygen (Li-O-2) batteries. However, highly efficient and durable cathode catalysts are very limited, thus considerably hindering the application of Na-O-2 batteries. Herein, a vertically self-standing C@NiCo2O4 nanoneedle arrays (C@NiCo2O4-NAs) have been delicately designed and fabricated by a facile hydrothermal method. The NiCo2O4 nanoneedles are in-situ grown on the carbon paper, forming an unique urchin-like structure, which is directly used to Na-O-2 batteries as a self-standing and binder-free cathode for the first time. Under a current density of 50 mA g(-1), the Na-O-2 battery containing C@NiCo2O4-NAs cathode shows a high initial discharge capacity of 6500 mAh g(-1) (based on NiCo2O4 material mass) and low over-potential of 0.6 V due to the numerous catalytic sites and high electron mobility of C@NiCo2O4-NAs. SEM, XPS and FTIR tests have confirmed the formation of thin film-like Na2O2 discharge product on the surface and gaps of NiCo2O4 nanoneedles, and the special film-like structure can facilitate the decomposition of Na2O2 in the subsequent charging process and reduce the over-potential notably. Meanwhile, the robust urchin-like structure of C@NiCo2O4-NAs renders the Na-O-2 battery a high cyclic stability up to 120 cycles when the specific capacity is limited to be 800 mAh g(-1). (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | NiCo2O4 Nanoneedle arrays Na-O-2 batteries Cathode |
| DOI | 10.1016/j.jallcom.2018.09.121 |
| WOS Keyword | SODIUM-OXYGEN BATTERIES ; ENHANCED ELECTROCHEMICAL PERFORMANCE ; LITHIUM-ION BATTERIES ; METAL-AIR BATTERIES ; LI-O-2 BATTERIES ; BIFUNCTIONAL CATALYST ; GRAPHENE NANOSHEETS ; NICO2O4 NANOSHEETS ; CARBON NANOTUBES ; NI FOAM |
| Language | 英语 |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sic.ac.cn/handle/331005/27563 |
| Collection | 中国科学院上海硅酸盐研究所 |
| Recommended Citation GB/T 7714 | Liu, Yunzhao,Chi, Xiaowei,Han, Qi,et al. Vertically self-standing C@NiCo2O4 nanoneedle arrays as effective binder-free cathodes for rechargeable Na-O-2 batteries[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,772:693. |
| APA | Liu, Yunzhao,Chi, Xiaowei,Han, Qi,Du, Yuexiu,Yang, Jianhua,&Liu, Yu.(2019).Vertically self-standing C@NiCo2O4 nanoneedle arrays as effective binder-free cathodes for rechargeable Na-O-2 batteries.JOURNAL OF ALLOYS AND COMPOUNDS,772,693. |
| MLA | Liu, Yunzhao,et al."Vertically self-standing C@NiCo2O4 nanoneedle arrays as effective binder-free cathodes for rechargeable Na-O-2 batteries".JOURNAL OF ALLOYS AND COMPOUNDS 772(2019):693. |
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