阳极
材料科学
电化学
静电纺丝
异质结
储能
化学工程
耐久性
纳米技术
电极
碳纤维
降级(电信)
碳化作用
金属有机骨架
碳纳米纤维
复合材料
碳纳米管
光电子学
聚合物
复合数
化学
吸附
有机化学
计算机科学
量子力学
功率(物理)
物理化学
电信
工程类
物理
作者
Xiaoqing Ma,Jie Chen,Wenxi Zhao
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:12 (43): 22161-22172
被引量:22
摘要
Metal chalcogenides with structural pulverization/degradation and intrinsic low electrical conductivity trigger the challenging issues of serious capacity fading and inferior rate capability upon repeated de-/sodiation cycling. Multiple electroactive heterostructures can integrate the inherent advantages of a strong synergistic coupling effect to improve their electrochemical Na+-storage behavior and structural durability, showing robust mechanical features, fast Na+ immigration and abundant active insertion sites at intriguing heterointerfaces. Hence, a series-wound architecture of metal-organic framework (MOF)-derived heterogeneous (CoFe)Se2 hollow nanocubes confined into a one-dimension carbon nanofiber skeleton ((CoFe)Se2@CNS) was successfully developed via a template-assisted liquid phase anion exchange followed by electrospinning and conventional selenization treatment. When examined as an anode for sodium ion batteries, the (CoFe)Se2@CNS electrode exhibits remarkably enhanced electrochemical Na+-storage performance delivering a high sodiation capacity as high as 213.9 mA h g-1 after 3650 cycles at 5 A g-1 with a capacity degradation rate of only 0.0047% per cycle; specifically, it shows tremendous rate performance and ultrastable cycling durability of 194.7 mA h g-1 at a high rate of 8 A g-1 after 5630 cycles. This work can shed light on a fundamental approach for designing heterostructures of multiple electroactive components toward high-performance alkali metal ion batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI