Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States.
Nano Lett. 2011 Aug 10;11(8):3329-33. doi: 10.1021/nl2017042. Epub 2011 Jul 22.
Hybrid electrochemical energy storage devices combine the advantages of battery and supercapacitors, resulting in systems of high energy and power density. Using LiPF(6) electrolyte, the Ni-Sn/PANI electrochemical system, free of Li-based electrodes, works on a hybrid mechanism based on Li intercalation at the anode and PF(6)(-) doping at the cathode. Here, we also demonstrate a composite nanostructure electrochemical device with the anode (Ni-Sn) and cathode (polyaniline, PANI) nanowires packaged within conformal polymer core-shell separator. Parallel array of these nanowire devices shows reversible areal capacity of ∼3 μAh/cm(2) at a current rate of 0.03 mA/cm(2). The work shows the ultimate miniaturization possible for energy storage devices where all essential components can be engineered on a single nanowire.
混合电化学储能设备结合了电池和超级电容器的优点，从而产生了高能量和高功率密度的系统。使用 LiPF(6)电解质，无 Li 基电极的 Ni-Sn/PANI 电化学系统基于 Li 在阳极的嵌入和在阴极的 PF(6)(-)掺杂的混合机制工作。在这里，我们还展示了一种复合纳米结构电化学器件，其阳极（Ni-Sn）和阴极（聚苯胺，PANI）纳米线封装在共形聚合物核壳分离器内。这些纳米线器件的平行阵列在电流速率为 0.03 mA/cm(2)时表现出约 3 μAh/cm(2)的可逆面积容量。这项工作展示了储能设备的极限小型化，其中所有基本组件都可以在单个纳米线上进行设计。
