无形化驱动的离子储存机制 改变异常容量增强的变化
Sang-Eun Bak1, Woowon Chung1, Muhammad A Abbas2
1Department of Bionano Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea.
ACS applied materials & interfaces
|July 12, 2023
概括
研究人员发现,TiNbO4 (TNO) 呈现"负衰减",这是离子电池的异常容量增加. 这与无形化有关,为开发稳定的电池阳极提供了新的策略.
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:
- 容量色限制了离子电池的性能,这是由于循环过程中的材料降解.
- 负衰减,即周期性产能增加,通常与接口现象有关.
- 了解容量衰减机制对于开发先进的电池材料至关重要.
研究的目的:
- 为了研究新型阳极材料TiNbO4 (TNO) 的电化学行为.
- 为了确定在离子电池循环期间观察到的TNO"负衰减"背后的机制.
- 探索TNO在高性能和稳定的电池阳极方面的潜力.
主要方法:
- 作为离子电池阳极的TiNbO4 (TNO) 的电化学循环.
- 分析与储存机制相关的晶体结构变化.
- 与其他氧化类似物进行比较研究.
主要成果:
- TiNbO4 (TNO) 呈现出显著的"负衰减",随着循环增加的容量.
- 形态化被确定为一种新的机制,有助于TNO的负衰减.
- TNO的独特行为与其他通过无形化降解的氧化物形成鲜明对比.
结论:
- TiNbO4 (TNO) 显示出前所未有的负衰减机制,由无形化驱动.
- 这一发现为设计稳定和高性能氧化阳极提供了新的途径.
- 离子电池的独特特性为先进的离子电池开发开辟了新的途径.
更多相关视频
相关概念视频
MOS Capacitor
850
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...
850
Trends in Lattice Energy: Ion Size and Charge
24.0K
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:
24.0K
Formation of Complex Ions
23.7K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.7K
Batteries and Fuel Cells
27.7K
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...
27.7K
Long-term Potentiation
2.8K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when...
Hebbian LTP
LTP can occur when...
2.8K
Ion Exchange
624
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
624


