High power Na3V2(PO4)(3) symmetric full cell for sodium-ion batteriesopen access
- Sadan, Milan K.; Haridas, Anupriya K.; Kim, Huihun; Kim, Changhyeon; Cho, Gyu-Bong; Cho, Kwon-Koo; Ahn, Jou-Hyeon; Ahn, Hyo-Jun
- Issue Date
- ROYAL SOC CHEMISTRY
- NANOSCALE ADVANCES, v.2, no.11, pp.5166 - 5170
- Journal Title
- NANOSCALE ADVANCES
- Start Page
- End Page
- Sodium-ion batteries (SIBs) are a viable substitute for lithium-ion batteries due to the low cost and wide availability of sodium. However, practical applications require the development of fast charging sodium-ion-based full-cells with high power densities. Na3V2(PO4)(3) (NVP) is a bipolar material with excellent characteristics as both a cathode and an anode material in SIBs. Designing symmetric cells with NVP results in a single voltage plateau with significant specific capacity which is ideal for a full cell. Here we demonstrate for the first time a tremendous improvement in the performance of NVP symmetric full cells by introducing an ether-based electrolyte which favors fast reaction kinetics. In a symmetric full cell configuration, 75.5% of the initial capacity was retained even after 4000 cycles at 2 A g(-1), revealing ultra-long cyclability. Excellent rate performances were obtained at current densities as high as 1000C, based on the cathode mass, revealing ultrafast Na+ transfer. The power density obtained for this NVP symmetric cell (48 250 W kg(-1)) is the best among those of all the sodium-ion-based full cells reported to date.
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- 공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles
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