Large-scale energy storage technology is the strategic supporting technology in transformation of energy structure and change of electricity production and consumption mode in China. Among the numerous energy storage technologies

the chemical energy storage technology with super capacitor and various kinds of energy storage batteries as representative

has the fastest development and the most promising prospect in the field of large-scale energy storage. In this paper

the present application status of super capacitor

lead-carbon battery

lithium-ion battery

sodium sulfur battery and redox flow battery is introduced. The advantage and challenge when different energy storage systems are used in large-scale energy storage are analyzed and discussed and

at the same time

the study work of liquid metal battery developed by us is introduced.