热电池用过渡金属二硫化物及其复合材料的研究进展

Recent development of transition metal disulfides and their composites for thermal batteries

过渡金属二硫化物具有较高的理论比容量、稳定的电化学性能及成熟的制备工艺,是锂系热电池中应用最广的正极材料之一,但其同时也存在电极电位低、大功率放电能力弱等问题,致使其进一步的发展受到限制。目前,对于过渡金属二硫化物正极材料的优化及改性是锂系热电池领域的核心课题。本文综述了FeS_(2)、CoS_(2)与NiS_(2)等过渡金属二硫化物在放电机理、制备工艺及电化学性能方面的研究现状,介绍了双金属二硫化物及过渡金属二硫化物/碳素类复合材料的主要研究进展。同时,通过对现有研究的归纳与总结,指出了掣肘过渡金属二硫化物正极材料发展的关键问题,简述了针对过渡金属二硫化物的主要改性手段,并对其之后的研究提出了一些建议与想法。

Transition metal disulfide has stable electrochemical performance,high theoretical specific capacity,and mature preparation method,and is one of the most widely used cathode materials in lithium thermal batteries.But at the same time,there are also several problems such as low electrode potential and weak high-power discharge capability,which limit its further development.At present,the optimization and modification of transition metal disulfides is a core subject in the field of lithium thermal batteries.This review provides a summary of the extensive research on main transition metal disulfides such as FeS_(2),CoS_(2) and NiS_(2) in terms of discharge mechanism,preparation technology and electrochemical performance,and introduces the research progress of bimetal disulfides and transition metal disulfide composites containing carbon-based substances.In addition,through the analysis of the current studies,the key issues that hinder the further development of transition metal disulfide cathode materials are clearly pointed out,the main modification methods for transition metal disulfides are briefly described,and some ideas and suggestions about the subsequent research are also specifically proposed.