Lucifer is a Latin word that was introduced into the text of the Bible by Jerome when he created the Vulgate. It does not refer to Satan.

The word "lucifer" is not the name of a person. It means "light bearer" and often refers to the morning star or the planet Venus. It only occurs once in the King James Version of the Bible.

In this verse, the King of Babylon is sarcastically referred to as "Lucifer, son of the morning," whose kingdom will be overthrown.

How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! Isaiah 14:12

Jesus is also referred to as "the day star," which was translated into Latin as Lucifer by Jerome.

We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts. 2 Peter 1:19

And in Revelation, Jesus refers to himself as "the bright and morning star."

I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star. Revelation 22:16

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Here are a few short videos by Dan McClellan that discuss the word "lucifer" in the Bible.

Wikipedia: Lucifer