To find academic literature, use an article database like SLUth Search Plus or ABI/Inform to search for terms like "electric vehicles" AND "infrastructure."
To find market research on consumer attitudes toward electric vehicles and other alternative forms of transportation (as well as strategies for reaching the "green consumer"), use Mintel.
Web sources abound. Here are selected sources that past students have found useful:
This Deloitte white paper discusses EV charging infrastructure, and includes a break-even analysis in Figure 3. Some of the footnotes may lead to additional useful sources.