Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea.
Small. 2015 Jun 24;11(24):2885-92. doi: 10.1002/smll.201500491. Epub 2015 Mar 25.
Three-dimensional porous Sb/Sb2 O3 anode materials are successfully fabricated using a simple electrodeposition method with a polypyrrole nanowire network. The Sb/Sb2 O3 -PPy electrode exhibits excellent cycle performance and outstanding rate capabilities; the charge capacity is sustained at 512.01 mAh g(-1) over 100 cycles, and 56.7% of the charge capacity at a current density of 66 mA g(-1) is retained at 3300 mA g(-1) . The improved electrochemical performance of the Sb/Sb2 O3 -PPy electrode is attributed not only to the use of a highly porous polypyrrole nanowire network as a substrate but also to the buffer effects of the Sb2 O3 matrix on the volume expansion of Sb. Ex situ scanning electron microscopy observation confirms that the Sb/Sb2 O3 -PPy electrode sustains a strong bond between the nanodeposits and polypyrrole nanowires even after 100 cycles, which maintains good electrical contact of Sb/Sb2 O3 with the current collector without loss of the active materials.
采用简单的电沉积方法，成功制备了具有聚吡咯纳米线网络的三维多孔 Sb/Sb2 O3 阳极材料。Sb/Sb2 O3 -PPy 电极具有优异的循环性能和出色的倍率性能；在 100 次循环中，电荷容量保持在 512.01 mAh g(-1)，在 66 mA g(-1)的电流密度下，电荷容量保留了 56.7%，在 3300 mA g(-1)下仍有 3300 mA g(-1)的容量。Sb/Sb2 O3 -PPy 电极电化学性能的提高不仅归因于使用高度多孔的聚吡咯纳米线网络作为基底，还归因于 Sb2 O3 基质对 Sb 体积膨胀的缓冲作用。原位扫描电子显微镜观察证实，即使经过 100 次循环，Sb/Sb2 O3 -PPy 电极仍能保持纳米沉积物和聚吡咯纳米线之间的强结合，从而保持 Sb/Sb2 O3 与集电器之间的良好电接触，而不会损失活性材料。
