Citation: Lv Wanwan, Xue Runping, Chen Sheng, Jiang Mengjin. Temperature stability of symmetric activated carbon supercapacitors assembled with in situ electrodeposited poly(vinyl alcohol) potassium borate hydrogel electrolyte[J]. Chinese Chemical Letters, ;2018, 29(4): 637-640. doi: 10.1016/j.cclet.2017.11.035 shu

Temperature stability of symmetric activated carbon supercapacitors assembled with in situ electrodeposited poly(vinyl alcohol) potassium borate hydrogel electrolyte

College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China

Corresponding author: Jiang Mengjin, memoggy@126.com
Received Date: 3 October 2017
Revised Date: 16 November 2017
Accepted Date: 24 November 2017
Available Online: 26 April 2017

Figures(3)

The temperature stability of supercapacitor (SC) is largely determined by the properties of the electrolyte. Hydrogel electrolytes (HGE), due to their hydrophilic polymer skeleton, show different temperature stability to that of liquid aqueous electrolytes. In this study, symmetric activated carbon (AC) SCs had been assembled with in situ electrodeposited poly(vinyl alcohol) potassium borate (PVAPB) HGE. The electrochemical performance of the SCs was systematically studied at different temperatures. Results show that the conductivity of PVAPB HGE is comparable with that of liquid aqueous electrolytes at different temperatures. The operating temperature range of PVAPB HGE SCs is -5-60 C, while those of the 1 mol/L Na₂SO₄ SCs and the 0.9 mol/L KCl SCs are 20-80 C and 20-40 C, respectively. The specific capacitance of PVAPB HGE SC is higher than those of SCs using liquid aqueous electrolytes at any temperature. The excellent temperature stability of PVAPB HGE makes it possible to build stable aqueous SCs in the wider temperature range.
- Hydrogel electrolyte,
- Activated carbon,
- Electrodeposition,
- Temperature stability,
- Supercapacitor
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沈阳化工大学材料科学与工程学院沈阳 110142