A photo-rechargeable battery which has two functions of the opto-electric c
onversion and the storage of the electrochemical energy was investigated fo
r TiO2/carbon fibers (CFs) compound electrodes. The laser deposition method
was used to produce TiO2 fine particles on the surface of CFs to improve t
he photo-rechargeable performances. Some of the electrodes prepared in He g
as had the photo-charged quantity 10-100 times as large as those in vacuum
and those prepared by the sintering method. The difference of the mechanism
of the charge was discussed. (C) 2000 Elsevier Science B.V. AII rights res
erved.