Pre-sodiated nickel cobaltite for high-performance sodium-ion capacitors
Article
Yang, Dongfang, Sun, Xiaoming, Lim, Kyungmi, Gaddam, Rohit Ranganathan., Kumar, Nanjundan Ashok, Kang, Kisuk and Zhao, X. S.. 2017. "Pre-sodiated nickel cobaltite for high-performance sodium-ion capacitors." Journal of Power Sources. 362, pp. 358-365. https://doi.org/10.1016/j.jpowsour.2017.07.053
Article Title | Pre-sodiated nickel cobaltite for high-performance sodium-ion capacitors |
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ERA Journal ID | 1470 |
Article Category | Article |
Authors | Yang, Dongfang, Sun, Xiaoming, Lim, Kyungmi, Gaddam, Rohit Ranganathan., Kumar, Nanjundan Ashok, Kang, Kisuk and Zhao, X. S. |
Journal Title | Journal of Power Sources |
Journal Citation | 362, pp. 358-365 |
Number of Pages | 8 |
Year | 2017 |
Publisher | Elsevier |
ISSN | 0378-7753 |
1873-2755 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jpowsour.2017.07.053 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0378775317309370 |
Abstract | Sodium-ion capacitors (NICs) are a hybrid energy storage system that store energy via both charge adsorption at the cathode/electrolyte interface and charge intercalation in the bulk of the anode, thereby possessing a higher energy density than supercapacitors and a higher power density than batteries. In this work, nickel cobaltite (NiCo2O4) hollow spheres with a chestnut shell morphology have been solvothermally synthesized and tested in a sodium half-cell. The NiCo2O4 material exhibits a reversible capacity of 313 mAh g−1 at 1 A g−1. Pre-sodiation of NiCo2O4 is found to significantly improve its energy density. A NIC fabricated with pre-sodiated NiCo2O4 as the anode and an activated carbon (AC) as the cathode delivers an energy density of 60 Wh kg−1 at the power density of 10,000 W kg−1. Ex-situ X-ray diffraction (XRD) and transmission electron microscopy (TEM) results reveal that NiCo2O4 is converted to metallic nickel and cobalt and Na2O phases during the pre-sodiation. The metallic nickel and cobalt phases are kinetically favourable for the electrolyte diffusion and electrochemical reactions, thus significantly improving the performance of the pre-sodiated NiCo2O4 electrode. |
Keywords | Energy density; Nickel cobaltite; Pre-sodiation; Sodium-ion capacitors |
ANZSRC Field of Research 2020 | 401703. Energy generation, conversion and storage (excl. chemical and electrical) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Seoul National University, Korea |
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https://research.usq.edu.au/item/z2342/pre-sodiated-nickel-cobaltite-for-high-performance-sodium-ion-capacitors
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