INTRODUCTION
Demand for low power, battery operation device’s on the rise, particularly in potable equipment requiring longer operation with higher reliability. Advances in the miniaturization of electronic device and MEMS(MicroElectro-Mechanical Systems) technology have reduced the current and power requirements of some of these devices to extremely low levels. This has made possible
the use of thin film solid-state microbatteries as power sources for these devices. Therefore, it is important to develop long lasting and high-energy efficient thin film batteries that can be as an integral part of MEMS. LiMn2O4 is particularly interesting cathode material for microbattery, since it can reversibly intercalate one Li ion per mole, without altering the MnO2 framework[1][2].
This system has a 4V operating voltage versus Li metal negative electrode and good electrochemical behavior is expected due to the favorable kinetics for fast Li ion diffusion through the three dimensional channel of the Mn2O4 spinal structure. To prevent from Mn dissolution in liquid electrolyte and Jahn-Teller distortion of LiMn2O4, we substituted cobalt for manganese. We’ll expect that
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