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|Title:||A high energy and power sodium-ion hybrid capacitor based on nitrogen-doped hollow carbon nanowires anode|
|Citation:||Journal of Power Sources, 2018; 382:116-121|
|Dongdong Li, Chao Ye, Xinzhi Chen, Suqing Wang, Haihui Wang|
|Abstract:||The sodium ion hybrid capacitor (SHC) has been attracting much attention. However, the SHC's power density is significantly confined to a low level due to the sluggish ion diffusion in the anode. Herein, we propose to use an electrode with a high double layer capacitance as the anode in the SHC instead of insertion anodes. To this aim, nitrogen doped hollow carbon nanowires (N-HCNWs) with a high specific surface area are prepared, and the high capacitive contribution during the sodium ion storage process is confirmed by a series of electrochemical measurements. A new SHC consisting of a N-HCNW anode and a commercial active carbon (AC) cathode is fabricated for the first time. Due to the hybrid charge storage mechanism combining ion insertion and capacitive process, the as-fabricated SHC strikes a balance between the energy density and power density, a energy density of 108 Wh kg⁻¹ and a power density of 9 kW kg⁻¹ can be achieved, which overwhelms the electrochemical performances of most reported AC-based SHCs.|
|Keywords:||Sodium-ion hybrid capacitor; anode; capacitive contribution; nanowires; full carbon energy storage devices|
|Description:||Available online 22 February 2018|
|Rights:||© 2018 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Chemical Engineering publications|
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