Energy storage can compromise the energy production and consumption

and can further improve the economic level of the entire energy system. Only by the continuous improvement in the technology and the decrease in costs of energy storage

the cleansing transformation of the energy system can be promoted. This article first clarifies the positioning and evolution of energy storage in the process of the cleansing transformation of energy. Secondly

the current status of energy storage technology and application

mainly including technical and economic indicators

various application scenarios

technical applicability and capacity configuration under different application scenarios

application scale

etc

are summarized. Thirdly

the demands for the types of technologies and technical and economic indicators of energy storage for the cleansing transformation of energy are proposed

which are also the overall goal of the future development of energy storage technology. Finally

the sub-goals and corresponding technical routes of key technologies for energy storage are proposed from the five dimensions such as the energy storage ontology

system integration

application planning

operation control

and evaluation and standards. The development routes of key technologies for energy storage under the cleansing transformation of energy are put forward so as to provide reference for energy storage-related practitioners to carry out policy formulation

strategic research

project development

and technological innovation.