Patent ID: 8083909

Claim:
A device having tunable response that comprises: (a) a nanostructured electrode component C of a first electrochemical electrode and an electrode component D of a second electrochemical electrode; (b) an ionic ally conducting material that is substantially electronically nonconducting that connects said first and said second electrochemical electrodes; and (c) a means of providing a voltage between said first and said second electrochemical electrodes, wherein (i) the electrode component C is not in direct contact with an electrolyte, (ii) the electrode component C has an achievable capacitance of above about 0.1 F/g for substantially non-faradaic charging, (iii) the major volume fraction of C does not function predominately as a catalyst, (iv) properties changes of the electrode component C in response to predominately non-faradaically injected charge are used to achieve device performance, and (v) the device is operable for use as an electron emission device, and wherein, (A) the device response is at least partially effected by a change in the degree of non-faradaic charge injection in the electrode component C, and (B) the nanostructured electrode component C comprises a nanofiber.