Identifying the Activated Carbon Electrode Aging Pathways in Lithium-Ion Hybrid Capacitors.

ABSTRACT: This paper reports on several mechanisms of carbon aging in a hybrid lithium-ion capacitor operating with 1 mol L^-1 LiPF₆ in an ethylene carbonate/dimethyl carbonate 1:1 vol/vol electrolyte. Carbon electrodes were subjected to a constant polarization protocol (i.e., floating) at various voltages and analyzed postmortem via several complementary techniques. The selected protocol was able to simulate the behavior of the real system. Due to the use of metallic lithium as the counter electrode, the influence of battery-like aging mechanisms was assumed to be limited. Our approach focused on the aging mechanisms related to the carbon electrode and determined the structural and chemical changes leading to energy fading in lithium-ion hybrid capacitors. It was shown that an

SUBMITTER: Slesinska S 

PROVIDER: S-EPMC11775879 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature