Unraveling the origin of enhanced safety in capacitive-type carbon electrodes for 20C sodium-ion capacitors.

ABSTRACT: Sodium-ion capacitors (SICs) combine battery-type and capacitive-type electrodes to achieve both high energy density and high power density. However, the capacity of conventional capacitive carbon materials is typically limited to below 120 mA h g^-1, resulting in inferior energy density for SICs. Therefore, the development of high-capacity capacitive electrode materials is considered critical. Herein, capacitive soft carbon (SC) is synthesized through in situ phosphorus crosslinking strategies applied to coal tar, with the resulting material exhibiting a high tap density of 1.26 g cm^-3, which is larger than that of other carbon materials (<0.81 g cm^-3). Furthermore, the obtained carbon materials deliver a high capacitive capacity of 308 mA h g^-1

SUBMITTER: Xiong B 

PROVIDER: S-EPMC12587451 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature