【摘要】 通过阳极氧化法在铜基体上生成Cu(OH)2纳米针阵列,以此为基体,使用脉冲电沉积法制备Cu(OH)2-Sb Sn前驱体,在400℃下煅烧2 h,得到Cu-O-Sb-Sn复合电极。用XRD、SEM和充放电测试,分析产物物相组成、形貌结构与电化学性能的关系。热处理后,具有纳米针阵列的Cu-O-Sb-Sn复合电极性能较好。以0.15 m A/cm2的电流密度在0.01~1.80 V充放电,首次可逆容量密度为1.68 m Ah/cm2,第50次循环的可逆容量密度为1.15 m Ah/cm2。热处理过程中生成的复杂多相和稳定的纳米针阵列结构,可提供足够的空间来缓解活性物质在充放电过程中的体积变化。更多还原

【Abstract】 Cu( OH)2nano-needle-like arrays were directly grown on a Cu substrate via an anodic polarization method. Using this matrix,Cu( OH)2-Sb Sn precursor was prepared through pulse electrodeposition process. Cu-O-Sb-Sn composite electrode was obtained after calcination under 400 ℃ for 2 h. XRD,SEM and charge-discharge test were used to analyze the relation between its phase composition,morphology structure and electrochemical performance. The calcinated Cu-O-Sb-Sn nano-needle-like arrays composite electrode exhibited a preferable electrochemical performance. The initial reversible capacity density of Cu-O-Sb-Sn composite electrode was 1. 68 m Ah / cm2 when charged-discharged at 0. 01 ~ 1. 80 V with the current density of 0. 15 m A / cm2,its reversible capacity density was 1. 15 m Ah / cm2 at the 50 th cycle. The complex multiphase and stable nano-needle-like arrays formed during the heating process could provide enough space to accommodate the large volume variation in charge-discharge process.更多还原