Corrosion and Degradation in Supercapacitors and Mitigation Approaches

Corrosion of metals and carbon in its numerous forms and of different functional materials like metal oxides used as active masses in supercapacitor electrodes contribute to the ageing and degradation of supercapacitors of the various established types. Examples, symptoms, and mechanisms of the degradation of material/electrode and the device level are presented and discussed. Remedies and suggestions are indicated to avoid this unwanted contribution to device failure and ageing.