两步法合成交联碳/氮双掺杂Fe3O4锂离子阳极材料

Two-pot Synthesis of Carbon/Nitrogen double-doped Interconnected Fe3O4 Lithium Battery Anodes

摘要:

采用简单高效的两步法制备交联结构的碳/氮双掺杂Fe3O4锂离子电池阳极复合材料(Fe3O4/C/N)。利用XRD、XPS、TG、SEM、TEM对其进行表征与分析。当具有交联状纳米结构的复合材料Fe3O4/C/N用作锂离子电池的阳极材料时展现出较高的可逆容量及优异的循环性能。在电流密度为0.2 A/g的条件下，交联状Fe3O4/C/N的首次库伦效率为73.9%，循环210圈后，容量仍达516mA•h/g，容量保持率为64.6%，每个循环周期的容量衰减率为0.17%。

Abstract:

In this paper, interconnected Fe3O4of carbon/nitrogen double-doped(Fe3O4/C/N)was prepared by a simple and efficient two-pot method. Profiting from the advantages of carbon/nitrogen double-doped and massively interconnected nanoarchitecture, Fe3O4/C/N was characterized and analyzed by XRD, XPS, TG, SEM and TEM.Fe3O4/C/N show excellent reversible capacity and exceptional cycle performance when used as anode materials for lithium ion batteries.The initial coulomb efficiency of Fe3O4/C/N is 73.9% and maintain capacity of 516mA•h/g after 210 cycles at current density of 0.2 A/g. The capacity retention is 64.6%, which equivalent to a small capacity decay of 0.17% per cycle. Therefore, as an anode material, Fe3O4/C/N has excellent application in lithium-ion batteries.