[Two departments: Research on high-efficiency compressed gas energy storage technologies such as supercritical carbon dioxide energy storage, isothermal compressed air energy storage, and constant pressure compressed air energy storage] On November 13, the National Development and Reform Commission and the National Energy Administration issued the "New Energy Storage Implementation Plan for the 15th Five-Year Plan". It is proposed to develop large-capacity and long-term physical energy storage technology. Make breakthroughs in technologies such as large-capacity and high-efficiency compressed air energy storage, high-temperature molten salt heat storage, and gravity energy storage; carry out optimization of compressed carbon dioxide energy storage, liquid air energy storage, and heat pump power storage systems; research on high-efficiency compressed gas energy storage technologies such as supercritical carbon dioxide energy storage, isothermal compressed air energy storage, and constant-pressure compressed air energy storage, as well as high-efficiency heat (cold) storage technology in a wide temperature range across days and seasons. Develop low-cost, long-duration chemical energy storage technology. Make breakthroughs in large-scale, long-term, high-efficiency, and low-cost flow battery energy storage technology, and develop high-performance vanadium-based, iron-based, zinc-based, and organic flow batteries; research long-duration lithium/sodium-ion battery energy storage technology; explore ultra-long-duration, low-cost hydrogen energy storage, and thermochemical energy storage technologies.