材料科学
X射线光电子能谱
石墨烯
煅烧
化学工程
水溶液
介孔材料
氧化物
离子电导率
电导率
扫描电子显微镜
透射电子显微镜
纳米技术
电极
化学
复合材料
催化作用
物理化学
工程类
电解质
冶金
生物化学
作者
Jieduo Guan,Qiaofeng Huang,Lianyi Shao,Xun Shi,Dongdong Zhao,Liubin Wang,Zhipeng Sun
出处
期刊:Small
[Wiley]
日期:2023-01-04
卷期号:19 (15)
被引量:27
标识
DOI:10.1002/smll.202207148
摘要
Aqueous zinc ion batteries (AZIBs) have attracted much interest in the next generation of energy storage devices because of their elevated safety and inexpensive price. Polyanionic materials have been considered as underlying cathodes owing to the high voltage, large ionic channels and fast ionic kinetics. However, the low electronic conductivity limits their cycling stability and rate performance. Herein, mesoporous Na3 V2 (PO4 )2 F3 (N3VPF) nanocuboids with the size of 80-220 nm cladded by reduced graphene oxide (rGO) have been successfully prepared to form 3D composite (N3VPF@rGO) by a novel and fast microwave hydrothermal with subsequent calcination strategy. The enhanced conductivity, strengthened pseudocapacitive behaviors, enlarged DZn2+ , and stable structure guarantee N3VPF@rGO with splendid Zn2+ storage performance, such as high capacity of 126.9 mAh g-1 at 0.5 C (1 C = 128 mA g-1 ), high redox potentials at 1.48/1.57 V, high rate capacity of 93.9 mAh g-1 at 20 C (short charging time of 3 mins) and extreme cycling stability with capacity decay of 0.0074% per cycle after 5000 cycles at 15 C. The soft package batteries also present preeminent performance, demonstrating the practical application values. In situ X-ray diffraction, ex situ transmission electron microscopy and X-ray photoelectron spectroscopy reveal a reversible Zn2+ insertion/extraction mechanism.
科研通智能强力驱动
Strongly Powered by AbleSci AI