自组装的碳金属有机框架氧化物来自两个化温度作为离子电池的阳极材料
Yang Yang1, Min Li1, Xiaoqin Hu1
1Department of Chemistry, Changzhi University, Changzhi 046000, China.
Molecules (Basel, Switzerland)
|August 10, 2024
概括
金属有机框架 (MOFs) 模板化的半孔金属氧化物显示出对离子电池 (LIBs) 的承诺. 同的MOF-5前体产生Co-ZnO/C和Co-Co3O4/C纳米混合体,具有出色的电化学性能和稳定性.
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
- 纳米技术 纳米技术
背景情况:
- 金属有机框架 (MOF) 提供结构多样性和中等度.
- MOFs作为合成半孔金属氧化物的有效模板.
- 半孔金属氧化物是离子电池 (LIB) 的有希望的阳极材料.
研究的目的:
- 使用Co-dopedMOF-5前体合成Co-ZnO/C和Co-Co3O4/C纳米混合物.
- 为了研究这些纳米混合体作为LIBs的阳极材料的电化学性能.
- 了解材料相位,结构和电化学性质之间的关系.
主要方法:
- 合成共兴奋剂的MOF-5前体.
- 在特定的温度和气氛下对前体进行受控的回火.
- 合成纳米混合体 (Co-ZnO/C和Co-Co3O4/C) 的表征.
- 对LIBs的阳极材料进行电化学测试.
主要成果:
- 成功合成了Co-ZnO/C和Co-Co3O4/C纳米混合物.
- 在高电流密度循环后,Co-ZnO/C显示超过99%的容量保留.
- 在100个循环后,Co-Co3O4/C在0.1°C下达到898mAh·g-1的可逆容量.
- 半孔结构促进了快速的Li+扩散和体积变化调节.
结论:
- 材料的相位显著影响LIB阳极的电化学性能.
- 联合化MOF衍生的纳米混合体表现出卓越的稳定性和高容量.
- 半孔结构对于提高LIB中阳极材料的性能至关重要.
更多相关视频
10:53Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
Published on: February 5, 2019
9.0K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
1.9K
相关概念视频
Electron Transport Chains
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
The ETC is comprised of...
Batteries and Fuel Cells
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Oxidation and Reduction of Organic Molecules
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Metabolism of Chemolithotrophs
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation. However, because inorganic electron donors...
Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
