Research Progress on Transition State of Organic Electrode Materials

有机电极材料具有理论比容量大、结构可设计性强、加工使用过程环境友好等优点被广泛应用于二次电池的研究中。有机电极材料在氧化还原过程会产生具有不成对电子的自由基中间体,自由基中间体的稳定程度影响电极材料的电化学性能。通过改变材料的结构可以调控自由基中间体的稳定性,从而优化有机电极材料的电化学性能。本文对有机电极材料在电化学过程中产生的自由基中间体进行了分类介绍,阐明了材料结构、自由基中间体稳定性和电化学性能之间的关系。With the increasing requirements for high energy density, long lifetime, high safety, environmentally friendly fabrication, and sustainable development of large energy storage devices, the society calls for new electrode materials in rechargeable batteries beyond traditional inorganic materials which are limited by specific capacity. Organic electrode materials have been widely used in rechargeable batteries due to their advantages of large theoretical capacity, designable structures and environmentally friendly fabrications. In this review, the radical intermediates of organic electrode materials produced in the charging-discharging process (redox reaction) and their types are systematically reviewed. The stability of radical intermediates controlled by changing the structure of materials, and thereby, the optimization in the electrochemical performance of organic electrode materials are described. The reasons for the optimization of electrochemical performance are analyzed in depth, and the mechanism is discussed. This review provides guidance for improving the electrochemical performance of secondary batteries with organic materials as electrodes in the future.国家自然科学基金(21875206);国家自然科学基金(21403187);国家自然科学基金(21875097);河北省自然科学基金(B2019203487);深圳市科技创新委员会基础研究(JCYJ20170412153139454)通讯作者:卢周广,黄苇苇E-mail:[email protected];[email protected]:Zhou-GuangLu,Wei-WeiHuangE-mail:[email protected];[email protected].燕山大学亚稳材料制备技术与科学国家重点实验室,河北 秦皇岛 0660042.南方科技大学材料科学与工程系,广东 深圳 5180553.燕山大学环境与化学工程学院,河北 秦皇岛 0660041. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China2. Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China3. School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, Chin