20.109(F09): Mod 3 Day 5 Battery testing

Battery Testing

Introduction

Now you should know the capacity of the battery material that is made. Now determine the charge rate. We will be testing everything at 1C, this means that when we charge the battery it should take one hour, and it should discharge in one hour. Since every electrode weighs a little different, the charge/discharge rate will be slightly different. As an example, if I have an electrode of FePO4•H2O that has 1 mg of active material, then in order to discharge it in one hour I have to put a negative current of -143 uA.

                                1 mg x143 mAh/g x 1 g/1000 mg x 1/1hr = 143uA

The electrodes that were prepared during session 3 were placed in a vacuum oven and dried at 100oC for four hours. These are all in a glove box. Instructions will be given at the glove box on how to assemble battery and crimp the battery, then on how to run the battery on Galvanostat.

Protocols

For Next Time

==Reagents==