【摘要】 以1,4-苯二甲酸为配体,Fe Cl3为金属盐,采用溶剂热法合成了苯二甲酸-铁配位聚合物晶体。以其为前驱体,通过固相热解制备了尺寸均一的α-Fe2O3纳米粒子。利用XRD、FT-IR、SEM及TEM等手段对配位聚合物及其热解产物进行了表征。将α-Fe2O3纳米粒子用作锂离子电池负极材料,电化学测试结果表明:在0.1 A·g-1电流密度下充放电50次后,材料的可逆比容量仍保持在530 m Ah·g-1,表现出较高的比容量和优异的循环稳定性。更多还原

【Abstract】 α-Fe2O3 nanoparticles with uniform size were synthesized via a complex-precursor strategy. First, iron ion-based coordination polymer was synthesized via a solvothermal method by using p-benzene-dicarboxylic acid( p-H2bdc) as ligand. Second, α-Fe2O3 nanoparticles with uniform size were prepared via a solid state pyrolysis procedure. The synthesized coordination polymer and Fe2O3 product were characterized by XRD, FT-IR, SEM and TEM respectively. When used as anode material for lithium-ion batteries, the Fe2O3 electrode can deliever a stable reversible capacity of 530 m Ah·g-1after 50 charge-discharge cycles at a current density of 0.1 A·g-1,which showed a higher specific capacity and superior cycle stability.更多还原