Bio-inspired chemical hydrogen storage and discharge as a source of electrical energy
Fischer, Fabian ; Mermoud, Sophie ; Diouf, Gnagna ; Bastian, Christèle
In: Journal of Applied Electrochemistry, 2012, vol. 42, no. 6, p. 419-425
Ajouter à la liste personnelle- Summary
- Reversible bio-inspired chemical hydrogen storage systems accumulate electrical energy in the form of electrons and proton ions located on biomolecules or bio-like storage molecules. Electro-active biomolecules (EAB) in Yeast media show such behavior: 2e−+2H++EAB (aq) + ⇆EABH/H (aq) + , also electro-active Methylene Blue (MB): 2e−+2H++MB (aq) + ⇆MBH/H (aq) + . The power characteristics of microbial fuel cell stacks equipped with such bio-inspired hydrogen storage systems were examined. E. coli cultures charged these bio-inspired separate chemical hydrogen storage units up to E=0.50±0.06V; cell potentials increased proportionally in serial double, triple, and quadruple hydrogen storage stacks up to E OCV=1.98V; the maximum power densities that were obtained improved proportionally with stack length by an increment of 1.4. The bio-inspired chemical hydrogen storage principle is of great interest for application in low-cost batteries that store renewable energy