If you've followed the ebb and flow of QS stock, you'll know that not everything has gone the way the SSB specialist's leadership team had hoped. However, as InvestorPlace contributor Will Ashworth pointed out, QuantumScape CEO Jagdeep Singh mentioned that his company "could use iron-based cathodes — instead of nickel-based — with its lithium-metal anodes, delivering superior energy efficiency." Per the head executive, "[W]e're cathode-agnostic with our architecture, so we can switch from nickel to iron … 'When you couple iron-based cathodes with our lithium-metal anode, you get a 50% increase' in energy density," thereby making iron "a 'viable alternative' to nickel-based cathodes." The science checks out if you're interested in conducting further research. But the issue with QS stock is that the iron-replacing-nickel aspiration is a smoke-and-mirrors act.