Replacing a 'Teaser'-themed node in a View its it's 'Full Content'-theme using ajax in Drupal 7
You can try using the jQuery load method.

$('#teaser').load('node/exampleid #node-container');


Replace your teaser data with full-text.

The second method is to load hidden full-text with teaser in view; then, via jQuery on click method, just replace teaser by hidden-text.