Comment on "Flexible Asymmetric Supercapacitors Based on Nitrogen‐Doped Graphene Hydrogels with Embedded Nickel Hydroxide Nanoplates". Issue 10 (10th May 2017) - Vongehr, Sascha
Abstract : It is argued that the main claims of "Flexible Asymmetric Supercapacitors Based on Nitrogen‐Doped Graphene Hydrogels with Embedded Nickel Hydroxide Nanoplates" are strongly exaggerated. By selecting first a subregion (Δ V ) of the total voltage drop, the capacitance ( C Δ V ) is inflated by 30 %. Then, by selecting different regions for different properties and using different Δ V values in different terms of a single expression for the energy density ( E Δ V ), the value is doubled. A bending angle of only 45° is instead claimed to be 180°.