Formation of a CoMn-Layered Double Hydroxide/Graphite Supercapacitor by a Single Electrochemical Step.

ABSTRACT: Hybrid electric storage systems that combine capacitive and faradaic materials need to be well designed to benefit from the advantages of batteries and supercapacitors. The ultimate capacitive material is graphite (GR), yet high capacitance is usually not achieved due to restacking of its sheets. Therefore, an appealing approach to achieve high power and energy systems is to embed a faradaic 2D material in between the graphite sheets. Here, a simple one-step approach was developed, whereby a faradaic material [layered double hydroxide (LDH)] was electrochemically formed inside electrochemically exfoliated graphite. Specifically, GR was exfoliated under negative potentials by Co^II and, in the presence of Mn^II , formed GR-CoMn-LDH, which exhibited a high areal capacitan

SUBMITTER: Roy A 

PROVIDER: S-EPMC9826322 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature