MOFs基铁钴镍氧化物及其复合材料在锂离子电池中的应用

Application of MOFs-based iron-cobalt-nickel oxide and its complex materials in lithium-ion batteries

锂离子电池(LIBs)具有较高能量密度且无记忆效应,广泛应用于电动汽车、便携式电子产品。目前锂离子电池的商业石墨负极材料的容量已经接近理论值,限制了动力电池的发展,所以开发容量高、稳定性好、循环寿命长和倍率性能优良的负极材料显得尤为重要。金属有机骨架化合物(MOFs)基氧化物及其复合材料具有形貌均匀、多孔结构和高比表面积等优点,是理想的锂离子电池负极材料之一。本文总结以铁、钴、镍这3种金属为中心离子的MOFs基氧化物及其复合材料的性质、合成方法以及在锂离子电池中的研究应用。MOFs基氧化物及其复合材料能够提高电子与电荷的传输效率,缓解体积膨胀和电极粉碎,从而提高电池的循环性能和倍率性能。

Lithium-ion batteries(LIBs)have high energy density without no memory effect,and is widely used in portable electronic products as well as electric vehicles.The capacity of the current commercial graphite as lithium-ion battery anode materials is close to theoretical value,limiting the development of power batteries.Thus,it is very important to develop anode materials with high capacity,good stability,long cycle life,and good magnification performance.MOFs-based oxides and their composites have the advantages of uniform morphology,porous structure and high specific area,so they are ideal lithium-ion battery anode material.Based on three transition metals including Fe,Co,Ni,the properties of MOFs-based oxides and their composites,the preparation methods,and their applications in lithium batteries were summarized.MOFs-based oxides and their composite materials could improve the transmission efficiency of electrons and charges,alleviate volume expansion and electrode crushing,and therefore the cycle performance and rate performance of the battery were improved.This article explained the challenges faced by current research and provided ideas for follow-up research.