Sacrificial salts: Compensating the initial charge irreversibility in lithium batteries

Lithium salts enlisting azide, oxocarbons, dicarboxylates and hydrazides have been identified as a practical mean to compensate the irreversible capacity loss of LIBs negative electrodes. During the first charge, the anion loses electrons and converts to gaseous N2, CO or CO2, within an acceptable potential range (3 to 4.5 V). We report an electrochemical study on these easily accessible “sacrificial salts”.