Wang Dingrun, Li Yalan, Zhao Yuting, Guo Qinglei, Yang Siwei, Ding Guqiao, Mei YongFeng, Huang Gaoshan
Department of Materials Science, Fudan University, Shanghai, 200433, People's Republic of China.
Center for Excellence in Superconducting Electronics (CENSE), State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and information Technology, Chinese Academy of Science, Shanghai, 20050, People's Republic of China.
Nanoscale Res Lett. 2019 Feb 28;14(1):69. doi: 10.1186/s11671-019-2900-7.
Zinc oxide (ZnO) nanomembranes/graphene aerogel (GAZ) composites were successfully fabricated via atomic layer deposition (ALD). The composition of GAZ composites can be controlled by changing the number of ALD cycles. Experimental results demonstrated that the anode made from GAZ composite with ZnO nanomembrane of 100 ALD cycles exhibited highest specific capacity and best rate performance. A capacity increase of more than 2 times during the first 500 cycles was observed, and a highest capacity of 1200 mAh g at current density of 1000 mA g was observed after 500 cycles. On the basis of detailed electrochemical investigations, we ascribe the remarkable cycling-induced capacity increase to the alloying process accompanied by the formation of a polymer layer resulting from kinetically activated electrolyte degradation at low voltage regions.
通过原子层沉积（ALD）成功制备了氧化锌（ZnO）纳米膜/石墨烯气凝胶（GAZ）复合材料。GAZ复合材料的组成可以通过改变ALD循环次数来控制。实验结果表明，由具有100次ALD循环的ZnO纳米膜的GAZ复合材料制成的阳极表现出最高的比容量和最佳的倍率性能。在前500次循环中观察到容量增加了2倍以上，在500次循环后，在1000 mA g的电流密度下观察到最高容量为1200 mAh g。基于详细的电化学研究，我们将显著的循环诱导容量增加归因于合金化过程，该过程伴随着在低电压区域由动力学激活的电解质降解形成聚合物层。
