Edit in JSFiddle

Ext.onReady(function () {
    Ext.create('Ext.Img', {
        renderTo: Ext.getBody(),
        src: 'https://cdn1.iconfinder.com/data/icons/yooicons_set01_socialbookmarks/512/social_google_box.png',
        //defines the element that wraps around the image
        autoEl: {
            tag: 'a',
            href: 'http://www.google.com',
            target: '_blank'
            //add any other attributes to the 'a' tag as needed
        }
    });
});