Electrochemical energy storage using slurry flow electrodes is now recognised for potentially widespread applications in energy storage and power supply. This study provides a comprehensive review of capacitive charge storage techniques using carbon-based slurry electrodes. Carbon particle properties and their effects on the performance of slurry flow electrodes are thoroughly reviewed. A detailed analysis of electrochemical properties of slurry flow electrodes is provided, including their dependence on the concentration ratio of electrolyte to carbon, flow behaviour, and design flow channel configuration. This paper also identifies key challenges and research gaps to be addressed by future research studies for improving the performance of carbon-based slurry flow electrodes on their path to further commercialisation.