期刊
ENERGY STORAGE MATERIALS
卷 4, 期 -, 页码 66-70出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ensm.2016.03.002
关键词
Received 16 February 2016; Received in revised form; 5 March 2016; Accepted 6 March 2016; Available online 31 March 2016
资金
- NSERC Alexander GrahamBell Canada Graduate Scholarship
- Hatch Graduate Scholarship for Sustainable Energy Research
- US Army Research, Development, and Engineering Command (RDECOM) [W911 QX-13-C-0056]
Ultra-fast solid electric double layer capacitors (EDLCs) have been developed in both sandwich and planar interdigitated configurations using vertically-oriented graphene nanosheet (VOGN) electrodes with a hydroxide ion-conducting tetraethylammonium hydroxide (TEAOH)-polyvinyl alcohol (PVA) polymer electrolyte. These solid-state EDLCs could be scanned at a rate of 1000 Vs(-1) in cyclic voltammetry and demonstrated response times of less than 1 ms. They retained high performance over 18 months of shelf storage and after 100,000 charge/discharge cycles with limited packaging, demonstrating the high stability of TEAOH-PVA electrolyte. The solid-state capacitors are capable of performing at elevated temperatures and have demonstrated a response time of 0.35 ms at 90 degrees C. Given their ultra-fast rate capability, excellent shelf-life and cycle life, and excellent temperature stability, these solid-state EDLCs are promising smaller and lighter alternatives to the bulky electrolytic capacitors now used for ac line-filtering. (C) 2016 Elsevier B.V. All rights reserved.
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