摘要
水系锌离子电池(AZIBs)MnO_(2)正极材料由于具有较高的工作电压和低制造成本等特点而备受关注,MnO_(2)正极固有的导电性差和充放电过程中结构坍塌等问题,导致其比容量较低和循环稳定性较差,严重制约了AZIBs的发展。本文通过调研相关文献,综述了提高MnO_(2)正极材料电导率和循环稳定性的策略,重点介绍了MnO_(2)结构调控、纳米工程、掺杂改性和与高导材料复合等改性策略。通过分析不同晶体结构的MnO_(2)正极材料的电化学性能,建立了MnO_(2)晶体结构与电池比容量之间的构效关系。详细分析了不同的合成手段对MnO_(2)纳米形貌及电池比容量的影响,为不同形貌的MnO_(2)制备提供了指导。同时分析了元素体相掺杂以及高导电碳基材料的添加对MnO_(2)电导率和循环稳定性的影响规律。最后对高性能AZIBs用MnO_(2)正极材料的发展进行了展望,不同的改善策略可以混合使用,并起到协同作用。
Due to its favorable operating voltage and affordable fabrication,MnO_(2)cathode for AZIBs has garnered considerable interest.However,the development of rechargeable Zn//MnO_(2)batteries is severely restricted by the limited specific capacity and poor cycling stability arising from the inherently poor electrical conductivity and structural collapse of MnO_(2)cathodes during the charge-discharge process.The common methods for increasing the conductivity and cycling stability of the MnO_(2)cathode are discussed in this review through the use of related literature research and analysis.The relationship between the crystal structure of MnO_(2)and the specific capacity of the battery was established by examining the electrochemical performance of various structures of MnO_(2).Meanwhile,the effect of different synthesis methods on MnO_(2)shapes was also summarized for MnO_(2)synthesis in the future.Furthermore,a brief discussion of the improvement in conductivity and cycling stability of the MnO_(2)cathode brought on by the addition of other elements to the MnO_(2)lattice and carbonbased materials is provided.Finally,the future development of MnO_(2)cathodes with high performance is investigated.The various enhancement strategies can be synergistically adopted to improve the electrochemical performance of the MnO_(2)cathode.
作者
婷婷
林其杭
刘长洋
卞刘振
孙超
齐冀
彭继华
安胜利
TING Ting;LIN Qihang;LIU Changyang;BIAN Liuzhen;SUN Chao;QI Ji;PENG Jihua;AN Shengli(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology;Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices,Baotou 014010,Inner Mongolia,China;School of Metallurgical and Ecological Engineering,University of Science&Technology Beijing,Beijing 100083,China;Key Laboratory of Green Extraction&Efficient Utilization of Rare-Earth Resources,Ministry of Education,Baotou 014010,Inner Mongolia,China)
出处
《储能科学与技术》
CAS
CSCD
北大核心
2023年第3期754-767,共14页
Energy Storage Science and Technology
基金
国家自然科学基金(52202257,51974167)
内蒙古自治区自然科学基金博士基金(2020BS05032)。
