四酸盐离子的缺电子性质维持了层状氧化的结构稳定性
Jiamin Jing1, Rong Tang1, Zhiyuan Luo1
1The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
这项研究开发了一种用于超级电容器的新-氧化/减少氧化石墨烯异构结构. 该材料具有增强的电化学性能,包括高容量和稳定性,为先进的储能解决方案铺平了道路.
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:
- 氧化是超级电容器的一个有前途的阳极材料,因为它具有很高的理论容量和材料可用性.
- 氧化的挑战包括电导率低和循环稳定性有限,阻碍其实际应用.
- 开发先进的电极材料对于提高超级电容器性能至关重要.
研究的目的:
- 构建NixCo1-xOH) 2和减少的石墨烯氧化物 (rGO) 的异构结构,以增强电化学性能.
- 调节层间离子以进一步提高材料的电化学效率.
- 研究开发材料在超级电容器和不对称装置中的性能.
主要方法:
- 使用一阶段的热水方法合成了NixCo1-x(OH)2/rGO异构结构.
- 四酸盐离子 (B4O72-) 被用作介层离子,以产生支柱效应并增强结构稳定性.
- 在部位进行替代以稳定分层的氧化物结构.
- 用循环电压计,静电电荷放电和电化学阻抗光谱来评估电化学性质.
- 使用合成材料作为正电极和活性碳作为负电极组装了一个不对称的超级电容器装置.
主要成果:
- 在Ni9Co-TB/G0.03复合物中,它在1A·g-1时表现出1977F·g-1的特定电容.
- 这种材料表现出了极好的循环稳定性,在5000次循环后在10A·g-1下保持了88%的容量.
- 不对称的超级电容器在1A·g-1总时达到164F·g-1的特定电容,并在80A·g-1总时保持100F·g-1.
- 该设备的能量密度为44 Wh·kg-1和功率密度为16,687 W·kg-1.
结论:
- 开发的Ni9Co-TB/G0.03异构结构显著提高了超级电容应用的电化学性能.
- 替代,四酸离子和rGO集成的组合导致了更好的动力学,稳定性和导电性.
- 该材料显示出高性能储能设备的巨大潜力,显示出出色的速率能力和能量/功率密度.
更多相关视频
09:56Layer-by-layer Collagen Deposition in Microfluidic Devices for Microtissue Stabilization
Published on: September 29, 2015
08:12Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
相关概念视频
Lewis Structures of Molecular Compounds and Polyatomic Ions
Stability of structures
Electronic Structure of Atoms
An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Common Ion Effect
Covalent Bonding and Lewis Structures
