Journal
ACS NANO
Volume 14, Issue 1, Pages 867-876Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b08030
Keywords
3D printing; nitrogen-doped; porous MXene; sodium-ion hybrid capacitor; energy/power density
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Funding
- National Natural Science Foundation of China [51702225]
- National Key Research and Development Program [2016YFA0200103]
- Natural Science Foundation of Jiangsu Province [BK20170336]
- Beijing Municipal Science and Technology Commission [Z161100002116020]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Suzhou, China
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3D printing technology has stimulated a burgeon- ing interest to fabricate customized architectures in a facile and scalable manner targeting wide ranged energy storage applications. Nevertheless, 3D-printed hybrid capacitor devices synergizing favorable energy/power density have not yet been explored thus far. Herein, we demonstrate a 3D-printed sodium-ion hybrid capacitor (SIC) based on nitrogen-doped MXene (N-Ti3C2Tx) anode and activated carbon cathode. NTi3C2Tx affording a well-defined porous structure and uniform nitrogen doping can be obtained via a sacrificial template method. Thus-formulated ink can be directly printed to form electrode architecture without the request of a conventional current collector. The 3D-printed SICs, with a large areal mass loading up to 15.2 mg cm(-2), can harvest an areal energy/power density of 1.18 mWh cm(-2) / 4 0.15 mW cm(-2), outperforming the state-of-the-art 3D-printed energy storage devices. Furthermore, our SIC also achieves a gravimetric energy/power density of 101.6 Wh kg(-1) / 3 269 W kg(-1). This work demonstrates that the 3D printing technology is versatile enough to construct emerging energy storage systems reconciling high energy and power density.
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