Wide bandgap oxides with ionic conductor operate as single-layer fuel cell
Nanocomposite fuel cells have recently been shown to be able to work as a 1-layer fuel cell instead of a 3-layer (cathode,electrolyte, anode) traditional fuel cell. The 1-layer fuel cell is made of a mixture of semiconducting and ionic materials which contain all functionalities of a fuel cell. Basically, such as fuel cell would have a major potential for mass production because of its simple structure. The working principle of the single layer fuel cell has been debated. Now 911±¬ÁÏÍø researchers have verified the underlying mechanisms of this fuel cell type by using wide bandgap oxide materials (LiNiZn) with gadolinium-doped ceria. The oxides work as an insulator against electrons in the material preventing short-circuting of the fuel cell. It was found that the material mixture is a protonic conductor. The test fuel cells built reached a power density of 357 mW/cm2 at 550 C without using catalytic current collectors.
The results were published in Nano Energy 53 (2018) 391-397.
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