I'm not sure that increasing battery capacity is correlated with more explosive activity. These guys are using using the virus to increase surface area but the amount of lithium polymer may still remain constant so I don't think it will be more dangerous than the current line of lithium battery products.
The energy a battery is storing, in the event of an electrical short, is converted into heat. More energy, more heat. It's tough to work around this basic proposition of thermodynamics.
