Bormashov V.,Technological Institute For Superhard And Novel Carbon Materials7A Centralnaya Strtroitsk142190Moscowrussia |
Troschiev S.,Technological Institute For Superhard And Novel Carbon Materials7A Centralnaya Strtroitsk142190Moscowrussia |
Volkov A.,Technological Institute For Superhard And Novel Carbon Materials7A Centralnaya Strtroitsk142190Moscowrussia |
Tarelkin S.,National University of Science and Technology |
And 8 more authors.
Physica Status Solidi (A) Applications and Materials Science | Year: 2015
We designed, fabricated, and tested for the first time a prototype of nuclear micropower battery with an overall active area about 15cm2 consisted in 130 single cells based on Schottky barrier diamond diodes. Diodes selection for the battery assembly was performed on the basis of I-V curves measurements at electron beam irradiation in SEM. A typical energy conversion efficiency of each cell was about 4-6%. To characterize a battery prototype performance, we carried out photovoltaic measurements using different radioisotopes. Under irradiation by 63Ni source with activity of 5mCicm-2, the output power density of 3nWcm-2 was obtained. Due to large energy loss of the emitted β particles in source itself, the total battery efficiency was only 0.6%. However, with the long-lived 63Ni isotope, this already gives the battery specific energy of about 120 W·hr/kg, comparable with the commercial chemical cells. During experiments with high activity 90Sr-90Y source, no degradation was observed after 1,400h of the radiation exposure. The maximum output power density of 2.4μWcm-2 was achieved using 238Pu α source. The results display that synthetic diamond is a highly promising material for nuclear microbattery fabrication. A strategy to further cell optimization is also discussed. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.