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Title: Bio-inspired redox mediated electrolyte for high performance flexible supercapacitor applications over broad temperature domain

Journal Article · · Journal of Power Sources
 [1];  [1];  [1];  [2];  [3]
  1. Imam Abdulrahman Bin Faisal University, Dammam (Saudi Arabia)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Imam Abdulrahman Bin Faisal University, Dammam (Saudi Arabia); Argonne National Lab. (ANL), Lemont, IL (United States)

For practical supercapacitors, recent advances in electrolytes have diminished long-standing problems such chemical stability, low ionic conductivity and limited electrochemical performance. Herewith, we communicate a facile method to produce anhydrous redox-active Bio-inspired electrolytes for flexible supercapacitors with application over a broad temperature range. The glycerol (Gly) gel electrolyte consists of various fractions of potassium hydroxide (KOH) and redox active unit, i.e., ammonium molybdate, (NH4)2MoO4 (abbreviated as Mo), in the anhydrous state. The doped glycerol matrix acts as a framework that provides a stable gel electrolyte, forming hierarchical pathway for ion diffusion. The developed gel network with Gly-KOH-MoX (X = 3, 5, 10, and 15%, w/w) provides an effective route to carry the ions onto the pores of the electrodes. The supercapacitor with Gly-KOH5-Mo10 gel provides a specific capacitance of 328 F g–1, and the same device achieved an energy density of 45.6 Wh kg–1 at a power density of 497 W kg–1. In addition, the supercapacitor maintained extraordinary cyclic robustness and wide temperature tolerance. Thus, the low cost and environmentally benign, cyclic durability of Gly-KOH-Mo makes these gel electrolytes a potential candidate for use in various energy storage devices.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
Deputyship for Research & Innovation, Ministry of Education; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1774557
Journal Information:
Journal of Power Sources, Vol. 474; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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