Optimization Design,Preparation And Performance Study Of Multi-layer Dual-effect Isotope Battery

Radio-voltaic isotope battery and radio-luminescent isotope battery are two research hotspots of miniaturization and long-life battery.However,their electrical performance and energy conversion efficiency are relatively low at present.This paper presents a novel isotope battery scheme based on a ?-ray source.This isotope battery couples the two-energy conversion mechanism of the radio-voltaic effect and the radio-luminescent effect.A series of studies on structural design,parameter selection,prototype preparation and performance testing were carried out.The main contents of this paper are as follows:1)Through the trial production of four-layer dual-effect isotope battery sample based on ?-ray source,the effectiveness and feasibility of using the radio-voltaic effect and the radio-luminescence effect coupling mechanism to improve the electrical performance of isotope batteries are demonstrated.Fourlayer AlGaInP-ZnS:Cu dual-effect isotope battery and a four-layer AlGaInP radio-voltaic effect isotope battery were prepared.X-ray tubes were used instead of gamma ray sources to test their electrical properties.The electrical performance of the four-layer AlGaInP-ZnS:Cu dual-effect isotope battery is superior to that of the four-layer AlGaInP radio-voltaic effect isotope battery.The energy deposition and electrical performance contribution of the fluorescent layer and radio-voltaic layer were studied with the MCNP5 software.2)An optimized design scheme of multi-layer dual-effect isotope battery based on thin-film triplejunction GaAs radio-voltaic layer and ZnS:Cu fluorescent material was proposed.The matching relationship between the radio-luminescence spectrum of the fluorescent material and the quantum response efficiency of the thin-film triple-junction GaAs radio-voltaic layer was analyzed.The influence of the self-absorption and scattering of fluorescent material on the intensity of emitted fluorescent light was studied with the radio-luminescence photons transport model.The fluorescent layer parameters of each radio-voltaic layer were optimized with the transport model of radioluminescence photons.3)The three-layer dual-effect isotope battery sample was prepared based on the thin-film triplejunction GaAs radio-voltaic layer and ZnS:Cu fluorescent material and the electrical properties were tested.Thin-film triple-junction GaAs radio-voltaic layer samples were prepared by micro-nano processing technology.The I-V characteristics of the radio-voltaic layer were tested under dark conditions and X-ray tube irradiation conditions,respectively,and the factors affecting the electrical performance of the radio-voltaic layer were analyzed.A three-layer dual-effect isotope battery based on thin film triple junction GaAs radio-voltaic layer and ZnS:Cu fluorescent material was prepared and the electrical performance was tested under different irradiation conditions.The short-circuit current of the three radio-voltaic layers is basically the same.Each radio-voltaic layer in the three-layer dual-effect isotope battery was connected in series and in parallel,respectively.The electrical performance of the isotope battery in series mode is better than battery in parallel mode.The research work in this paper provides an important experimental basis for the preparation,improvement in the electrical performance and energy conversion efficiency of multi-layer dual-effect isotope batteries based on ?-rays,which lay a technical foundation for the research and development of this isotope battery.