高性能钠离子电容器用多层内置电场的空心多孔Co0.85Se/ZnSe@MXene阳极

IF 4.7 2区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Lu Shi, Ruixin Liu, Yuan Tang, Jiale Wang, Zheng Wang, Guanggui Cheng, Meng Hu*, Yang Yang* and Jianning Ding, 
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引用次数: 0

摘要

钠离子电容器以其优异的功率和能量密度在储能领域具有广阔的应用前景。然而,缓慢的电池型阳极和快速的电容器型阴极在动态行为上的内在差异限制了它们的性能。为了解决这个问题,我们利用易蚀刻和静电自组装策略制备了具有多异质结构的空心多孔Co0.85Se/ZnSe@MXene阳极。中空多孔结构和多异质界面通过减小体积变化来稳定阳极。密度泛函理论(DFT)进一步表明,诱导的多层内嵌电场促进了离子快速扩散路径的形成,降低了Na+的吸附能,从而提高了Na+/电子传输动力学。制备的TA-Co0.85Se/ZnSe@MXene阳极在1 A g-1下循环1000次后具有406 mA h g-1的长期稳定性,在10 A g-1下具有288 mA h g-1的超高倍率性能。当与活性炭(AC)阴极配对时,sic提供了非凡的能量/功率密度,分别为144w h kg-1和12000 W kg-1,在10000次循环后保持超过80%的容量保持在1a g-1。这种具有诱导多层内建电场的工程多异质结构阳极的创新策略对推进高能、大功率储能系统具有重要的前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Hollow Porous Co0.85Se/ZnSe@MXene Anode with Multilevel Built-in Electric Fields for High-Performance Sodium Ion Capacitors

Hollow Porous Co0.85Se/ZnSe@MXene Anode with Multilevel Built-in Electric Fields for High-Performance Sodium Ion Capacitors

Sodium ion capacitors (SICs) are promising candidates in energy storage for their remarkable power and energy density. However, the inherent disparity in dynamic behavior between the sluggish battery-type anodes and the rapid capacitor-type cathodes constrained their performance. To address this, we fabricated a hollow porous Co0.85Se/ZnSe@MXene anode featuring multiheterostructure, utilizing facile etching and electrostatic self-assembly strategies. The hollow porous structure and multiple heterointerfaces stabilize the anode by mitigating the volume changes. Density functional theory (DFT) calculations further revealed that induced multilevel built-in electric fields facilitate the formation of rapid ion diffusion pathways and reduce the Na+ adsorption energy, thereby boosting Na+/electron transport kinetics. The fabricated TA-Co0.85Se/ZnSe@MXene anode demonstrates outstanding long-term cycling stability of 406 mA h g–1 after 1000 cycles at 1 A g–1, with an ultrahigh rate performance of 288 mA h g–1 at 10 A g–1. When paired with the active carbon (AC) cathode, the SICs deliver extraordinary energy/power densities of 144 W h kg–1 and 12000 W kg–1, maintaining over 80% capacity retention at 1 A g–1 after 10000 cycles. This innovative strategy of engineering multiheterostructured anode with the induced multilevel built-in electric fields holds significant promise for advancing high-energy and high-power energy storage systems.

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来源期刊
Inorganic Chemistry
Inorganic Chemistry 化学-无机化学与核化学
CiteScore
7.60
自引率
13.00%
发文量
1960
审稿时长
1.9 months
期刊介绍: Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.
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