Electrode Characteristics and Lithiation Mechanism of FePc/GN Composites
Electrode Characteristics and Lithiation Mechanism of FePc/GN Composites
复制标题
FePc/GN复合材料的电极特性及锂化机理
DOI：
10.20964/2018.03.45
复制
发表时间：
2018-03
影响因子：
1.5
通讯作者：
侯豪情
中科院分区：
文献类型：
--
作者：
侯豪情
酞菁铁（FePc）是一种具有大π共轭平面多环芳族结构的金属有机化合物，可作为锂离子电池的有机负极材料。为了克服FePc电导率差的缺点，通过一步简单的机械混合策略集成了导电性能良好的石墨烯纳米片碳骨架。此外，系统地优化了FePc与石墨烯纳米片的重量比。电化学测试表明，制备的1/2.25-FePc/GN复合材料具有872 mAh g -1的高可逆容量，基于酞菁铁的比容量可达1614 mAh g -1。FePc/GN优异的电化学性能主要归功于FePc （π共轭结构大，富含N原子和芳环）与石墨烯（柔韧性好，导电性好）的协同作用。
Iron-phthalocyanine (FePc), a metal-organic compound containing a large π-conjugated and planar multi-ring aromatic structure, can be employed as an organic anode material for lithium-ion batteries. To overcome the poor electronic conductivity of FePc, a good electrically conductive graphene nanosheet carbon skeleton is integrated by a one-step simple mechanical mixing strategy. In addition, the weight ratio of FePc and graphene nanosheets (GNs) is systematically optimized. Electrochemical tests show that the as-prepared 1/2.25-FePc/GN composite exhibits a high reversible capacity of 872 mAh g -1 , the specific capacity based on iron-phthalocyanine is up to 1614 mAh g -1 . The excellent electrochemical performance of FePc/GN is mainly attributed to the synergistic effect of FePc (large πconjugated structure, rich in N atoms and aromatic rings) and graphene (flexibility and good electrical conductivity).