The world is facing big challenges related to climate-change, energy and continuous oil crises due to insufficient fossil fuels. Presently, our major energy demands are fulfilled by means of fossil fuels that will eventually run out. Their use is deteriorating the environment leading to serious problems for human health. Fossil fuels also have negative impacts, being the dominant source of local air pollution and emitter of carbon dioxide (CO2) and other greenhouse gases. The Holy Qur’an says:
“Corruption has appeared throughout the land and sea by [reason of] what the hands of people have earned so He may let them taste part of [the consequences of] what they have done that perhaps they will return [to righteousness].” (30:42)
These challenges demand people to move towards sustainable, clean and renewable energy resources. Therefore, we are witnessing a rise in energy generation from the wind, sun, biomass and hydro resources with low carbon emissions. But some of these sources cannot provide a continuous supply of energy that potentially can cause an imbalance in the energy production and demands. Therefore, a solution to these challenges is not only energy generation, but energy-storage as well. Energy storage field is attracting attention from industrial and scientific communities to develop expertise in clean and renewable energy storage systems. Corresponding to their utilization in hybrid electric vehicles, wireless home appliances and communication devices of power requirement; the research in developing advanced miniaturized storage devices finds an enormous and vast future ahead. Among various energy storage systems, micro-supercapacitors (MSCs) has been regarded as alternative promising power sources to be integrated into miniaturized devices, emerging due to their significantly long cycling life and high power density. A significant factor for the energy efficient applications demands a considerably higher specific surface area
to enhance the capacitance by incorporation of new materials. Based on 2D architectures with improved conductivity, enlarged specific surface, enhanced redox activity, as well as the unique synergetic effect exhibit great promise in the application of miniaturized supercapacitors with highly enhanced performance. Herein, the architecture engineering of emerging materials toward optimizing the performance of micro-supercapacitors is discussed, in order to promote the application of 2D architectures in miniaturized energy-storage devices.