Abstract:
Global energy and environmental issues are driving the development of modern advances in efficient and
environmentally friendly energy storage systems. Such systems must meet a range of requirements, which
include high energy and power density, long service life, flexibility, industrial scalability, security and reliability.
Progressive achievements in the field of energy storage are associated with the development of various kinds of
batteries and supercapacitors. Supercapacitors are state-of-the-art energy storage devices with high power
density, long lifespan, and the ability to bridge the power/energy gap between conventional capacitors and
batteries/fuel cells. However, supercapacitors have limitations associated with low energy density, which can be
solved by using various types of current collectors, since current collectors are one of the main massive components
of supercapacitors. This review gives a complete understanding of the effect of current collectors on the
actual performance and properties of supercapacitors. We reviewed current collectors based on carbon and
metal-containing materials, and supercapacitor configurations to identify possible improvements in electrochemical
performance in terms of specific capacitance, energy density, power density, service life and variability
in their application.