That's not a new idea, and for those that remember (aka Armondikov) in BCU a thing called "Chronicles of Ea", I had even included those.
Here is an article from New Scientist from 2007:
http://space.newscientist.com/article.ns?id=dn11623&feedId=online-news_rss20Keep in mind, the shields they speak about, would not be deflecting anything "solid" with nice blue effects. Not even dust. Mostly protons.
The idea is that certain cosmic radiation particles are charged, so you make another charged bubble around your ship, to turn those away.
On the other hand:
Very fascinating stuff. Im pretty sure we will have one of these reinforcing the ozone layer a few hundred years from now.
Ozone layer protects us from Ultra Violet light. UV light, being light (photons), does not have a charge, so that shield would be completely useless.