A direct-write method for preparing a bimetal sulfide/graphene composite as a free-standing electrode for high-performance microsupercapacitors.

ABSTRACT: It is a great challenge to ideally integrate graphene with its unique two-dimensional (2D) and porous structure into the pseudocapacitive materials. In this paper, a simple technique, i.e. direct-laser-writing (DLW), was developed to fabricate microsupercapacitors (MSCs) with excellent electrochemical performance, marked as Ni-Co-S/laser induced graphene (LIG) that exhibit a high areal specific capacitance of 680 mF cm^-2 at the current density of 1 mA cm^-2. A symmetric MSC device was assembled using Ni-Co-S/LIG as a positive electrode and active carbon (AC) as the negative electrode, and exhibited a high areal energy density of 56.9 μW h cm^-2 at the power density of 800 μW cm^-2, and excellent cycling stability maintaining 89.6% of the area

SUBMITTER: Liu H 

PROVIDER: S-EPMC9056894 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature