TY  - JOUR
AU  - Weber, Christian
AU  - Reichenauer, Gudrun
AU  - Pflaum, Jens
TI  - Electroless Preparation and ASAXS Microstructural Analysis of Pseudocapacitive Carbon Manganese Oxide Supercapacitor Electrodes
JO  - Langmuir
VL  - 31
IS  - 2
SN  - 0743-7463
CY  - Washington, DC
PB  - ACS Publ.
M1  - PUBDB-2015-06046
SP  - 782 - 788
PY  - 2015
N1  - (c) American Chemical Society. Post referee full text in progress. 
AB  - Anomalous small angle X-ray scattering (ASAXS) has been utilized as a noninvasive, integral tool to access the structural properties of carbon xerogel–manganese oxide electrodes with nanometer resolution. As these electrodes constitute the elementary functional units in supercapacitors and as their microstructure governs the macroscopic electrical performance, it is essential to gain a detailed morphological understanding of the underlying carbon particle scaffold coated with manganese oxide. We demonstrate that, in this regard, ASAXS provides a powerful technique and in combination with a theoretical core–shell model enables a quantitative estimation of the relevant structural parameters. As a result, we determined the thicknesses of the solution deposited MnO<sub>2</sub> shells to range between 3 and 26 nm depending on the carbon particle size and thus on their effective surface area. By our core–shell modeling we conclude the revealed manganese oxide coatings on the carbon support to be rather thick, but nevertheless to show a high uniformity in thickness. At 1.8 ± 0.2 to 2.2 ± 0.1 g/cm<sup>3</sup> the related effective MnO<sub>2</sub> densities of the shells are about 30
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000348333700016
C6  - pmid:25453192
DO  - DOI:10.1021/la5027762
UR  - https://bib-pubdb1.desy.de/record/292359
ER  -