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Abstract:
Hybrid capacitor has attracted great interest owing to the higher energy density compared with traditional double-layer capacitor. However, the fabrication of high-performance hybrid aqueous capacitor based on low-cost and multivalent ion storage remains challenging. In this work, highly porous TiO2 microrods (P-TiO2-MRs) with uniform and large pore size are prepared extensively with a simple hydrothermal synthesis. Such micro/nano-structured anode exhibit remarkably enhanced Al ion intercalation/deintercalation performance in optimized AlCl3 aqueous electrolyte. The electrode has large discharge capacity with 111.1 mAh g−1 @ 1 A g−1 and superior rate capability with 49.8 mAh g−1 @ 5 A g−1. For the first time, a novel hybrid device is fabricated through assembling insertion-type P-TiO2-MRs anode and absorption-type active carbon (AC) cathode (P-TiO2-MRs//AC) in AlCl3 aqueous electrolyte. The fabricated hybrid capacitor delivers a high energy density of 26.3 Wh kg−1 @ 627.3 W kg−1 as well as an outstanding high power of 5454.5 W kg−1 @ 10.9 Wh kg−1. In addition, it also displays excellent rate capability and superior retention of 63% even after 1000 cycles. © 2020 Elsevier B.V.
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Journal of Power Sources
ISSN: 0378-7753
Year: 2020
Volume: 453
9 . 1 2 7
JCR@2020
8 . 1 0 0
JCR@2023
ESI HC Threshold:196
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
SCOPUS Cited Count: 13
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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