Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (7): 5-9.

Previous Articles     Next Articles

Progress of Carbon Dioxide Energy Storage Technology from a Patent Perspective

Lin Wei   

  1. Sinopec Guangzhou Engineering Co., Ltd., Guangzhou 510620, Guangdong, China
  • Online:2025-07-15 Published:2025-07-21

专利视角下二氧化碳储能技术进展分析

蔺伟   

  1. 中石化广州工程有限公司，广东省广州市510620
  • 作者简介:蔺伟，工程师，知识产权律师，2015年毕业于中国石油大学（华东），主要从事企业知识产权管理工作。联系电话：020-22192043，E-mail: linwei.lpec@sinopec.com.

PDF

Abstract:

With the global energy structure transitioning toward low-carbon development, carbon dioxide energy storage technology has emerged as a research hotspot in novel energy storage technologies due to its high efficiency, safety, and environmental friendliness. From a patent perspective, this paper systematically reviews the global patent application trends, major applicants, patent landscapes, and technological advancements in carbon dioxide energy storage, revealing the competitive landscape and innovation directions in this field. The results show that patent applications in this domain have experienced rapid growth since 2021, with China being the primary source and main market for patented technologies. System pressure is identified as a critical factor influencing system design. Balancing system pressure, energy storage density, and system efficiency—along with optimizing thermodynamic design and equipment structure to minimize energy loss—remains a key research focus. Future technological development will place greater emphasis on system integration and multi-technology synergy. As the technology matures, carbon dioxide energy storage is poised to play a more significant role in future energy systems, substantially contributing to addressing climate change and achieving sustainable development goals.

Key words: patent, carbon dioxide energy storage technology, critical state, phase change, system coupling, system pressure, energy storage density, system efficiency

摘要：

随着全球能源结构向低碳化转型，二氧化碳储能技术因其高效性、安全性和环境友好性，成为新型储能技术的研究热点。从专利视角出发，系统梳理了全球范围内二氧化碳储能技术的专利申请趋势、主要申请人情况、专利布局及技术进展，揭示了该领域的竞争格局与技术创新方向。研究结果表明，该领域专利申请从2021年起迎来快速增长，中国是专利技术的主要来源国与主要市场国；系统压力是影响系统设计的关键因素，如何在系统压力、储能密度及系统效率间取得平衡，并对热力学设计、设备结构优化以减少系统能量损失，是该领域的研究重点，未来技术发展将更加注重系统集成和多技术协同。随着技术的不断成熟，二氧化碳储能有望在未来能源系统中发挥更加重要的作用，为应对气候变化和实现可持续发展目标做出更大贡献。

关键词: 专利, 二氧化碳储能, 临界状态, 相态变化, 系统耦合, 系统压力, 储能密度, 系统效率