石墨烯及其聚合物复合材料在锂离子电池中的应用研究进展

Applications of Graphene and Its Polymer Composite Electrodes for Lithium Ion Battery

石墨烯的出现为设计和构建新型功能复合材料提供了广阔的空间,文中详细综述了石墨烯及其聚合物复合材料在锂离子电池中的研究进展。石墨烯是一种极有发展潜力的负极材料,储锂性能受到结构特征、含氧官能团和杂质原子等多种因素影响,导致储锂行为和机理较为复杂。将具有储锂活性的聚合物与石墨烯复合作为正极材料,储锂性能受到聚合物氧化还原的可逆性和复合结构等因素影响。聚合物还作为晶格匹配剂和交联剂,有利于提高石墨烯与氧化物复合的结构稳定性。最后指出,聚合物种类和制备方法的选择是以改善储锂性能为原则,有针对性和预见性地设计和制备高性能锂离子电池电极材料。

The emergence of graphene provides a broad space for design and construction of novel functional composite materials. The progress of graphene and its polymer composite electrodes for Li-ion battery were reviewed in detail. Graphene is a promising anode material for Li-ion battery and its lithium storage properties are affected synthetically by many factors, such as structural characteristics, oxygen functional groups and impurity atoms. At the same time, the composite which is composed of polymer with functions of lithium storage and graphene as carrier could be used as cathode material for Li-ion battery. The lithium storage properties of composite are affected by the reversibility of redox reaction and the composite structure. In addition, the polymer can also be used as lattice matching agent and crosslinking agent for graphene oxide composite, which is beneficial to improve the stability of composite structure. At last, the selection principle for polymer type and preparation method is to improve the lithium storage properties of composite, which is helpful to design and prepare high performance electrode materials for Li-ion battery.