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Sun, Ke, Hu, Yuebo, Zhang, Xudong, San Hui, Kwan 
ORCID: https://orcid.org/0000-0001-7089-7587, Zhang, Keliang, Xu, Guogang, Ma, Jingyun and He, Wen
(2020)
N-doped hard/soft double-carbon-coated Na3V2(PO4)3 hybrid-porous microspheres with pseudocapacitive behaviour for ultrahigh power sodium-ion batteries.
Electrochimica Acta, 335.
ISSN 0013-4686
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Abstract
The development of sodium-ion batteries with high power density is highly challenging yet critically important in many applications. Herein, we develop sodium-ion batteries with ultrahigh power density by using N-doped hard/soft double-carbon-coated Na3V2(PO4)3 hybrid-porous microspheres as a cathode. A higher working potential of 3.4 V, superior rate capability (93 mA h g−1 at 10C, 81 mA h g−1 at 30C) as well as stable cycling performance (72.9% capacity retention at 10C after 1000 cycle) are simultaneously achieved. Very impressively, it can deliver pseudocapacitive behavior and a practical energy density of 317 W h kg−1 at a power density of 194 W kg−1, which also remains 73.5 W h kg−1 even at an ultrahigh power density of 12600 W kg−1. The superior performances can be ascribed to the hybrid-porous microsphere structure, which provide favorable kinetics for bath electron and Na+, large cathode-electrolyte contact area, as well as robust structural integrity. This design provides a promising pathway for developing low-cost sodium-ion batteries with high energy density as well as high power density.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | high energy density,hybrid-porous microspheres,soft double-carbon-coated,na v (po ),ultrahigh power density,storage,electrode material,na3v2(po4)(3),cathode material,lithium-ion,cycling stability,hollow spheres,rate capability,electrochemical performance,life,rational design,chemical engineering(all),electrochemistry ,/dk/atira/pure/subjectarea/asjc/1500 |
| Faculty \ School: | Faculty of Science > School of Engineering (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Emerging Technologies for Electric Vehicles (former - to 2024) Faculty of Science > Research Groups > Energy Materials Laboratory |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 16 Jan 2020 05:12 |
| Last Modified: | 11 Nov 2024 00:51 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/73656 |
| DOI: | 10.1016/j.electacta.2020.135680 |
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