在锂离子电池的应用实例中,锂离子不能通过2D石墨烯薄片,必须绕道才能到达电解液中。导致锂离子电池的扩散距离较长,充放电速率较慢。3D石墨烯可以很好地保持2D石墨烯的高导电性、表面丰富性和机械坚固性的特性,以及独特的二维电子行为。多孔石墨烯不仅具有独特的孔隙结构,而且引入了丰富暴露的边缘。多孔石墨烯扩展了可能的结构和电学性能的纳米结构,可用于锂离子电池中。综述了3D多孔石墨烯的常规制备方法和3D多孔石墨烯基纳米材料在锂离子电池负极材料中的研究进展。
In the application of lithium-ion batteries,lithium ions have to make a big detour to reach the electrolyte since they cannot pass through the 2D graphene sheets.This results in a long diffusion distance and consequently a slow charge-discharge rate for lithium-ion batteries.The 3D graphene can well preserve the properties of 2D graphene of high conductivity,surface richness,and mechanical robustness,together with unique 2D electronic behaviors.Porous graphene not only possesses unique pore structures,but also introduces abundant exposed edges.Porous graphene expands the amount of possible nanoarchitectures with excellent structural and electrical properties that can be used in lithium-ion batteries.The conventional methods for the preparation of 3D porous graphene were summarized,and research progress in 3D porous graphene-based nanomaterials for Lithium-ion battery anode material was reviewed.
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基金资助
国家自然科学基金(51402030);重庆市基础科学与前沿技术研究专项基金项目(cstc2017jcyjBX0028)
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