作为高性能离子混合电容的阴极材料,具有超高表面积的3D N和O共等级多孔碳
Yuxuan Wang1,2, Yirun Zhu2, Hang Liu2
1School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, China.
The Journal of chemical physics
|January 29, 2026
概括
研究人员为水性离子混合电容器 (ZIHC) 开发了新的N和O联合剂的层次性多孔活性炭 (3DNOHC). 这种先进的材料克服了性能限制,为ZIHC设备提供了更高的能量密度和长期稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子混合电容器 (ZIHC) 提供具有成本效益和安全的能源存储.
- ZIHC中的碳基材料面临着诸如离子/孔隙不匹配和有限的活性位点等挑战,阻碍了性能.
- 优化阴极材料对于高能量密度和ZIHC中稳定的电化学性能至关重要.
研究的目的:
- 为ZIHC应用合成和表征一种新型的三维N和O联合合的层次性多孔活性炭 (3DNOHC).
- 研究N/O联合兴奋剂对ZIHC中活性炭的电化学特性和离子运输动力学的影响.
- 为了评估ZIHCs使用开发的3DNOHC阴极材料的性能.
主要方法:
- 通过直接化盐前体,然后通过化学激活合成3DNOHC.
- 使用Brunauer-Emmett-Teller (BET) 分析对特定表面积 (3477.69 m2 g-1) 的表征.
- 3DNOHC//Zn设备的电化学测试,包括循环电压测量,静电电荷放电和长期循环.
- 在现场和现场分析 (XRD,Raman) 来研究设备操作期间的结构变化.
主要成果:
- 合成的3DNOHC具有超高的特定表面积和丰富的多孔结构.
- 密度函数理论 (DFT) 的计算证实了因N/O联合兴奋剂而增强的离子吸附/脱离.
- 3DNOHC-6//Zn装置实现了高可逆容量 (171/102 mAh g−1 在0.2/10 A g−1),能量密度 (137 Wh kg−1 在160 W kg−1),以及优异的容量保留 (80% 在45,000 个循环后在5 A g−1).
结论:
- 在ZIHC中,N和O联合剂显著提高了活性炭的电化学性能.
- 开发的3DNOHC材料证明了作为水性混合电容器的高性能阴极的潜力.
- 这项研究为设计下一代储能设备的先进活性碳材料提供了有价值的框架.
相关概念视频
Capacitors
931
Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
931
The Carbon Cycle
43.7K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.7K
Hybridization of Atomic Orbitals II
49.0K
sp3d and sp3d 2 Hybridization
49.0K
Hybridization of Atomic Orbitals I
67.2K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
67.2K
MOS Capacitor
1.5K
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
1.5K
Capacitors and Capacitance
9.3K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
9.3K


