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A Flexible Aqueous Asymmetric Lithium‐Ion Supercapacitor with High Voltage and Superior Safety.
- Source :
- Energy Technology; Jul2019, Vol. 7 Issue 7, pN.PAG-N.PAG, 1p
- Publication Year :
- 2019
-
Abstract
- Achieving high voltage and safety simultaneously in energy storage devices can greatly advance the development of flexible and wearable electronics. Thus, flexible aqueous asymmetric lithium‐ion supercapacitors with a high voltage attract the interest of many researchers. Herein, a new flexible aqueous asymmetric lithium‐ion supercapacitor with a high voltage and superior safety is fabricated using manganese oxide and iron hydroxide, which are electrodeposited on carbon cloths as electrodes and a super‐concentrated gel polymer as the electrolyte. Impressively, the flexible asymmetric lithium‐ion supercapacitor delivers a high voltage of 3.2 V, which is a high value in aqueous asymmetric supercapacitors. Moreover, the asymmetric supercapacitor exhibits a specific capacitance of 227.6 F g−1, a maximum energy density of 49.3 Wh kg−1, and a maximum power density of 11.5 kW kg−1, together with a capacitance retention of 82% after 1000 cycles at a current density of 2 A g−1. Importantly, the supercapacitor can keep good electrochemical performance under extremely harsh conditions, such as compressing, hammering, punching, and tailoring, which demonstrates superior safety. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21944288
- Volume :
- 7
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Energy Technology
- Publication Type :
- Academic Journal
- Accession number :
- 137287047
- Full Text :
- https://doi.org/10.1002/ente.201900293