No, you should not place an oven liner in the bottom of your oven. Your owner's manual should cover this topic. I don't have the full model number of your range. Normally, having a model number would allow me to refer you to the exact page in your owner's manual that addresses oven liners. I can quote page 4 of a common Kenmore 790 range that states:
Protective liners --
Do not use aluminum foil to line the oven bottom. Only use aluminum foil as recommended in this manual. Improper installation of these liners may result in risk of electric shock or fire.
Do not cover the broiler grid or oven bottom with aluminum foil.
Exposed fat and grease could ignite.
Placing an oven liner or aluminum foil on the bottom of the oven can also cause the problem described in this linked article:
The panel above the hidden heating element in your oven will get hotter that most conventional ovens with exposed elements. This is the design of the oven. Follow your owner's manual instructions for safely and properly cleaning your oven.