BRIEF REVIEW OF SOLID ELECTROLYTE FOR LITHIUM ION BATTERIES IN PARTICULAR TO GARNET-STRUCTURED Li7La3Zr2O12 SOLID-STATE ELECTROLYTE.

Abstract

In this review work it has been tried to briefly summarize solid state electrolytes conductivity status. As the very essential component for battery efficiency and performance, electrolytes need be given due attention as safety problems could also emanate from it as well. The oxide solid state electrolytes are very promising electrolytes for all-solid-state batteries for large applications. The garnet-structured Li 7 La 3 Zr 2 O 12 has shown high ionic conductivity that is comparable to the liquid electrolytes with large potential windows. At lower temperature Li 7 La 3 Zr 2 O 12 will have high Li-ordered and forms the tetragonal structure which is less ionic conductor as compared to the less Li-ordered cubic structure. A total ionic conductivity of the order of 10 -3 Scm -1 has been achieved by the cubic structures of Li 7 La 3 Zr 2 O 12 which will let it to be applicable in practice.Energy and energy sources are far more in need especially in this modern society. Whether could it be portable or grid storage beyond national security agenda, it is all about question of life. So far the fossil has dominated the source of energy which has brought a huge environmental impact by releasing CO 2 and other gases into the atmosphere which cause depletion of ozone layer. So the use of fossil fuels has flooded the planet with global warming which will end up with devastating consequences unless some measures are taken by using alternative energy sources [1-3]. Battery technology is one source and storage of energy that especially is used for portable electronic devices and even for electric vehicles. From the first rechargeable lead-acid battery to the recently developed lithium ion secondary batteries, we have different battery systems; and the lithium-ion batteries are the state-of-art technology batteries with high energy and power density with high performance. Very recently Lithium-air and Lithium-sulfur batteries are developed with higher energy density than lithium-ion batteries [4].