%0 Journal Article %1 mendoza-sanchez_scaleable_2013 %A Mendoza-Sánchez, Beatriz %A Rasche, Bertold %A Nicolosi, Valeria %A Grant, Patrick S. %D 2013 %J Carbon %K imported %P 337--346 %R 10.1016/j.carbon.2012.09.035 %T Scaleable ultra-thin and high power density graphene electrochemical capacitor electrodes manufactured by aqueous exfoliation and spray deposition %U http://www.sciencedirect.com/science/article/pii/S0008622312007725 %V 52 %X Graphene electrodes of high power density were manufactured by a surfactant-water based exfoliation method followed by a scaleable spray-deposition process. Cyclic voltammetry and galvanostatic charge–discharge experiments revealed a combination of electric double layer and pseudocapacitive behavior that, unlike the many graphene-oxide derived electrodes, was maintained to unusually high scan rates of 10,000 mV s−1, reaching a maximum capacitance of 543 μF cm−2 and with a capacitive retention of 57\% at 10,000 mV s−1. The performance of graphene electrodes was contrasted with carboxylated single walled carbon nanotubes that showed a sharp decrease in capacitance above 200 mV s−1. Electrochemical impedance spectroscopy analysis showed a fast capacitor response of 17.4 ms for as manufactured electrodes which was further improved to 2.3 ms for surfactant-free 40 nm thick electrodes. A maximum energy density of 75.4 nW h cm−2 gradually decreased as power density increased up to 2.6 mW cm−2. Graphene electrodes showed 100\% capacitance retention for 5000 cycles at the high power scan rate of 10,000 mV s−1.

@article{mendoza-sanchez_scaleable_2013, abstract = {Graphene electrodes of high power density were manufactured by a surfactant-water based exfoliation method followed by a scaleable spray-deposition process. Cyclic voltammetry and galvanostatic charge–discharge experiments revealed a combination of electric double layer and pseudocapacitive behavior that, unlike the many graphene-oxide derived electrodes, was maintained to unusually high scan rates of 10,000 mV s−1, reaching a maximum capacitance of 543 μF cm−2 and with a capacitive retention of 57\% at 10,000 mV s−1. The performance of graphene electrodes was contrasted with carboxylated single walled carbon nanotubes that showed a sharp decrease in capacitance above 200 mV s−1. Electrochemical impedance spectroscopy analysis showed a fast capacitor response of 17.4 ms for as manufactured electrodes which was further improved to 2.3 ms for surfactant-free 40 nm thick electrodes. A maximum energy density of 75.4 nW h cm−2 gradually decreased as power density increased up to 2.6 mW cm−2. Graphene electrodes showed 100\% capacitance retention for 5000 cycles at the high power scan rate of 10,000 mV s−1.}, added-at = {2024-03-25T12:35:57.000+0100}, author = {Mendoza-Sánchez, Beatriz and Rasche, Bertold and Nicolosi, Valeria and Grant, Patrick S.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2facc81fefd54511ddb8c6b2cc24b303f/brasche}, doi = {10.1016/j.carbon.2012.09.035}, file = {Mendoza-Sánchez et al_2013_Scaleable ultra-thin and high power density graphene electrochemical capacitor.pdf:files/843/Mendoza-Sánchez et al_2013_Scaleable ultra-thin and high power density graphene electrochemical capacitor.pdf:application/pdf;ScienceDirect Snapshot:files/838/S0008622312007725.html:text/html}, interhash = {a0f6eea7a278ca0b8b52e1829013d081}, intrahash = {facc81fefd54511ddb8c6b2cc24b303f}, issn = {0008-6223}, journal = {Carbon}, keywords = {imported}, month = feb, pages = {337--346}, timestamp = {2024-03-25T12:35:57.000+0100}, title = {Scaleable ultra-thin and high power density graphene electrochemical capacitor electrodes manufactured by aqueous exfoliation and spray deposition}, url = {http://www.sciencedirect.com/science/article/pii/S0008622312007725}, urldate = {2013-07-11}, volume = 52, year = 2013 }