Fabrication And Characteristic Evaluation Of All-solid-state Thin-filmed Lithium-ion Rechargeable Batteries

With the development of the MEMS and VLSI, there is an increasing requirement in the miniaturization and integration of power. With better integrated compatibility and electrochemical performance, all-solid-state thin-film lithium battery becomes the optimal choice for miniaturization and integration of MEMS and VLSI power.For its light weight, high energy density, all-solid-state thin film lithium-ion rechargeable battery can also be used in the military, aerospace and other fields. Due to thin film lithium-ion rechargeable battery and solar cell can be formatted to thin film pile which can become semi-permanent-type power supply without maintenance, it can provide a stable and lasting power for satellite and space station , and can reduce overall weight of solar panels, take-off weight of the rocket and the cost of rocket launchers. Moreover, it can improve the safety of satellites and the space stations, and can contribute to the development for aerospace with its light weight, non-leakage characteristics.Production process design and performance evaluation results of all-solid-state thin film lithium-ion rechargeable battery were discussed in detail. Thin film lithium-ion rechargeable batteries were successfully prepared on substrates of glasses, stainless steel sheets and organic materials by vacuum evaporation, magnetron sputtering etc. such as film-forming technology in were of all-solid-state thin film lithium-ion rechargeable batteries. It showed that batteries had good characteristics as high energy density and outstanding cycle performance through charge-discharge tests. In addition, batteries prepared on soft organic substrates can be applied in electronic products that can be bent with good plasticity, such as organic flexible display.Moreover, a variety of cathode and solid electrolyte thin film materials were successfully prepared with the method of magnetron sputtering of powder materials. All-solid-state thin film lithium-ion rechargeable batteries were cost down for powder raw materials were relatively cheap compared with sintered. Doped sputtering with any different proportions can also be easily achieved, which may improve electrochemical characteristics of batteries. Thin film battery was firstly prepared on substrate of paper in order to further reduce the production costs, and satisfy the application of arbitrary shape of electrical products. Results showed that voltage could be tested between cathode and anode, but lost after current collectors were deposited. Preliminary analysis showed that battery internal portions were short circuited for the paper surface was not smooth with the formation of a loose fiber structure. Therefore, paper needs to be further studied on the modification to the surface with expectation to the realization of the successful production of paper battery. Once achieved, the application of paper battery would have boundless prospects.