V2O5空心微球的尺寸控制合成及其尺寸依赖的存性能
Zhi Gao1,2, Guosen Xia1, Shikun Xie1,2
1School of Mechanical Engineering, Jinggangshan University, Jian 343009, China.
Langmuir : the ACS journal of surfaces and colloids
|February 13, 2026
概括
研究人员开发了一种新方法来控制氧化 (V2O5) 空心微球的大小,以提高离子电池的性能. 2.0μm微球显示出最好的结果,提供高容量和稳定性.
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:
- 多孔空洞微球为储能提供了优势,包括高密度和稳定性.
- 控制氧化 (V2O5) 空洞微球的大小对于优化其电化学性能至关重要,但仍然是一个挑战.
研究的目的:
- 开发一种简单的方法来合成可调节尺寸的V2O5空心微球.
- 研究这些微球在离子电池应用中的结构-尺寸-属性关系.
主要方法:
- 使用乙烯基醇 (EG) 和异醇 (IPA) 混合物的前体微球的溶热合成.
- 化前体微球以获得V2O5的中空微球,直径可控制 (0.5,2.0和5.0μm).
- 微球作为离子电池的阴极材料的电化学评估.
主要成果:
- 确定EG/IPA溶剂比为控制微球尺寸的关键参数.
- 在2.0μmV2O5空洞的微球展现出最高的特定表面积 (17.9 m2g-1).
- 2.0μm微球提供了卓越的电化学性能,具有高放电能力 (≤220 mA hg-1在0.2 C) 和良好的循环稳定性 (135 mA hg-1在1 C的100个循环后).
结论:
- 开发的方法允许对V2O5空心微球进行可调的合成.
- 2.0μm的微球显示出作为高性能离子电池的阴极材料的巨大潜力.
- 优化的尺寸,多孔结构和高表面积通过改善电解质透,电荷转移和体积缓冲来协同增强电化学性能.
相关概念视频
Cell Size
132.3K
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
132.3K
Precipitate Formation and Particle Size Control
6.9K
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
6.9K
Trends in Lattice Energy: Ion Size and Charge
26.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.8K
Brick Sizes
354
Brick sizing plays a crucial role in construction, influencing both the aesthetics and structural integrity of buildings. Bricks are defined by three dimensions: width, thickness, and length. They are commonly designed to fit modular measurements, typically in multiples of 4 inches or 8 inches in width, to facilitate uniform construction and compatibility with other building materials.
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
354
Genome Size and the Evolution of New Genes
9.2K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.2K
Maximum Size of Aggregate
573
The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can...
573


