Hi All,
have a look at this thesis work from Gregor Kron.
Very nice work which is almost a full book
of new experiences with these Titandioxid cells,
which are easy to rebuild at home:
http://elib.uni-stuttgart.de/opus/volltexte/2003/1440/index.html (http://elib.uni-stuttgart.de/opus/volltexte/2003/1440/index.html)
There is also an english short summary about it.
and here is the PDF File:
http://elib.uni-stuttgart.de/opus/volltexte/2003/1440/pdf/Dissertation_Kron.pdf (http://elib.uni-stuttgart.de/opus/volltexte/2003/1440/pdf/Dissertation_Kron.pdf)