Abstract Bimetal oxides have superior supercapacitive properties because of synergistic effect, but their applications are usually limited because of low conductivity. Metal cations doping has been a promising method to break the restriction. Here, we first selected CuCo2O4 nanowire arrays with high electrochemical activity as mother bimetal oxides and Al3+ with high electric conductivity as the dopant to investigate the influence of doped amounts on the electrochemical behaviors. With the increase of doped Al3+, the specific capacitance increased at first and then decreased, in accord with the analysis results of the conductivity, capacitive and diffusion-controlled contribution. The sample with the optimal doping amount had the highest capacitive behavior (1871 F g−1 at 1 A g−1) and considerable cycling performance (93% after 8000 cycles at 2 A g−1). A full button cell consisting of anode material (AC) and cathode material (the optimal Al-doping CuCo2O4) exhibited satisfied energy density (65 Wh kg−1) and power density (735 W kg−1) as well as favorable cycling performance (95% retention after 4000 cycles). A LED was successfully powered by the constructed full cell suggested the promising application in future industrial green energy-storage devices of the Al-doping CuCo2O4 nanomaterials.

中文翻译：

---

当 Al3+ 遇到 CuCo2O4 纳米线阵列：用于储能设备的增强型正极

摘要 双金属氧化物由于具有协同效应而具有优异的超级电容性能，但由于其导电性较低，其应用通常受到限制。金属阳离子掺杂一直是打破限制的一种很有前途的方法。在这里，我们首先选择具有高电化学活性的 CuCo2O4 纳米线阵列作为母双金属氧化物和具有高电导率的 Al3+ 作为掺杂剂，以研究掺杂量对电化学行为的影响。随着Al3+掺杂量的增加，比电容先增大后减小，与电导率、电容和扩散控制贡献的分析结果一致。具有最佳掺杂量的样品具有最高的电容行为（1 A g-1 时为 1871 F g-1）和可观的循环性能（2 A g-1 时 8000 次循环后为 93%）。由阳极材料 (AC) 和阴极材料（最佳 Al 掺杂 CuCo2O4）组成的完整纽扣电池表现出令人满意的能量密度（65 Wh kg-1）和功率密度（735 W kg-1）以及良好的循环性能（ 4000 次循环后保留 95%）。由构建的全电池成功供电的 LED 表明，掺杂 Al 的 CuCo2O4 纳米材料在未来工业绿色储能设备中的应用前景广阔。由阳极材料 (AC) 和阴极材料（最佳 Al 掺杂 CuCo2O4）组成的完整纽扣电池表现出令人满意的能量密度（65 Wh kg-1）和功率密度（735 W kg-1）以及良好的循环性能（ 4000 次循环后保留 95%）。由构建的全电池成功供电的 LED 表明，掺杂 Al 的 CuCo2O4 纳米材料在未来工业绿色储能设备中的应用前景广阔。由阳极材料 (AC) 和阴极材料（最佳 Al 掺杂 CuCo2O4）组成的完整纽扣电池表现出令人满意的能量密度（65 Wh kg-1）和功率密度（735 W kg-1）以及良好的循环性能（ 4000 次循环后保留 95%）。由构建的全电池成功供电的 LED 表明，掺杂 Al 的 CuCo2O4 纳米材料在未来工业绿色储能设备中的应用前景广阔。