在超级电容器的Mo薄膜上生长的化和氧化层
1Department of Chemistry, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Republic of Korea.
Materials (Basel, Switzerland)
|December 31, 2025
概括
化 (MoNx) 和氧化物 (MoO2) 层在薄膜上进行合成,用于电化学应用. 与MoNx相比,MoO2电极表现出优异的伪电容行为和速率能力.
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
- 表面科学是一门学科.
背景情况:
- 基于的材料正在探索用于储能应用.
- 化 (MoNx) 和氧化层的受控合成对于调整电化学性质至关重要.
研究的目的:
- 在薄膜上合成MoNx层,并研究其相位演变和电化学性能.
- 探索MoNx的转化为MoO2和MoO3及其随后的电化学特性.
- 为了比较MoNx/Mo和MoO2/Mo电极的伪电容性行为和电荷存储机制.
主要方法:
- 在NH3大气中通过热处理在烯薄膜上直接合成MoNx层.
- 控制氨溶解时间和温度的变化,以调整层厚度和形态.
- 随后在N2中化以形成MoO2,并在空气中氧化以形成MoO3.
- 使用X射线衍射 (XRD) 和X射线光电子谱学 (XPS) 的表征.
- 在0.5 M H2SO4电解质中进行电化学表征,包括循环电压测量和静电电荷放电.
主要成果:
- 通过XPS证实了的渐进氧化,Mo3d的结合能从Mo
- 两个MoNx/Mo和MoO2/Mo电极都表现出显著的伪电容性行为.
- 面积特定容量达到了520mFcm-2在10mVs-1的MoN/Mo电极.
- 增加的层厚度增加了电容,由于增加了电化学可访问的表面积和离子扩散.
- 与MoNx/Mo.相比,MoO2/Mo电极表现出优越的速率能力和更强大的法拉代贡献.
- 观察到MoO2的混合伪电容电荷存储机制的转变.
结论:
- 薄薄的MoNx和MoO2层可以在薄膜上有效地合成用于电化学能量存储.
- MoO2电极表现出增强的性能,包括更好的速率能力和更明显的伪电容电荷存储机制.
- 这些发现为开发超级电容器的先进电极材料提供了洞察力.
更多相关视频
11:24Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
15.0K
08:50Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
9.6K
相关概念视频
01:25MOS Capacitor
1.4K
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...
1.4K
01:18Capacitor With A Dielectric
4.8K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.8K