摘要
运用微乳液法,以醋酸盐为原料,草酸为沉淀剂,CTAB为表面活性剂,乙二醇为单一溶剂首先合成前驱体ZnCo2(C2O4)3纳米线,然后用ZnCo2(C2O4)3纳米线作为牺牲模板经过煅烧合成多孔的ZnCo2O4纳米线。用FT-IR、XRD、SEM、TEM和电化学性能测试,研究得到的产物的形貌结构和电化学性能。结果表明:合成了具有一维结构的尖晶石结构的ZnCo2O4纳米线,由于具有较大的比表面积和多孔性,更有利于锂离子的嵌入与脱出,其初始放电比容量达1841mAh.g-1,25次循环后容量还能达到765mAh.g-1,整体的库伦效率维持在100%左右,循环性能良好。
Abstract ZnCo2 (C2 O4 )a nanowires was synthesized by a simple microemulsion based method with acetate as raw material , oxalic acid as precipitator, CTAB as surfactant and glycol as single solvent, and then porous ZnCo2O4 nanowires was synthesized via annealing of a sacrifice template ZnCo2 (C2O4)3 nanowires. FTIR, XRD, SEM , TEM and electrochemical test were used to confirm the morphology and structures of the samples. The results showed that the as- prepared 1D nanostructures spinel ZnCo2 O4 nanowires was in favor of the lithiation and delithiation of lithium ion, which at-tributed to the larger surface area and porosity of ZnCo2 04 nanowires. The initial specific discharge capacity of the sample was 1841 mAh·g^-1 and stayed around 765mAh·g^-1 after 25 cycles, the holistic Coulombic efficiency was about 100%. The results indicated that the cycle performance was fine.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第2期92-94,共3页
New Chemical Materials
基金
太原市科技项目<纳米铁氧体/C/TiO2磁载高效光催化剂的开发>(20110321037-02)