Universität zu Köln

Zhou, Xuechou, Lu, Yanzhong, Zhen, Yichao, Wang, Zhengzhang, Zheng, Xinyu, Wei, Mingdeng and Hong, Zhensheng (2020). Facile fabrication of highly porous TiO2 microrods anode with enhanced Al-ion storage for hybrid capacitors. J. Power Sources, 453. AMSTERDAM: ELSEVIER. ISSN 1873-2755

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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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhou, Xuechou UNSPECIFIED UNSPECIFIED UNSPECIFIED Lu, Yanzhong UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhen, Yichao UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Zhengzhang UNSPECIFIED UNSPECIFIED UNSPECIFIED Zheng, Xinyu UNSPECIFIED UNSPECIFIED UNSPECIFIED Wei, Mingdeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Hong, Zhensheng UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-339939
DOI:	10.1016/j.jpowsour.2020.227857
Journal or Publication Title:	J. Power Sources
Volume:	453
Date:	2020
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1873-2755
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language URCHIN-LIKE TIO2; ACTIVATED CARBON; NANOTUBE ARRAYS; GRAPHENE OXIDE; ANATASE TIO2; ASSISTED SYNTHESIS; AQUEOUS-SOLUTION; SUPERCAPACITOR; PERFORMANCE; NANOSHEETS Multiple languages Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33993