相关实验视频
Updated: Jul 6, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.4K
-铜双离子电解质,以抑制树突生长并增加离子电容器中阳极利用率
Chanho Shin1, Lulu Yao1, Seong-Yong Jeong2,3
1Program in Materials Science and Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
Science advances
|January 3, 2024
概括
这项研究引入了一种双离子铜电解质,以改善可充电电化学电池. 新的电解质提高了能量密度和循环寿命,克服了关键的性能限制.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 可充电电化学电池面临着周期寿命和能量密度有限的挑战.
- 电极中的树突形成降低了性能,缩短了寿命.
- 提高利用率对于提高能源储能能力至关重要.
研究的目的:
- 为了研究可充电离子电容器 (ZIC) 的双离子Zn-Cu电解质.
- 抑制树突形成并延长ZICs的循环寿命.
- 为了提高的利用率和增加ZIC的能量密度.
主要方法:
- 研究了一种双离子Zn-Cu电解质的机制.
- 优化了负与正 (n/p) 电极容量比率.
- 评估了ZIC的能量密度,循环寿命和累积容量.
主要成果:
- 在3.10的n/p比率下达到41Wh/kg的最佳能量密度.
- 证明了22000个周期 (557小时放电) 的显著周期寿命,n/p比为5.93.
- 达到~581Ah/g的累计容量,超过了和离子电容器.
结论:
- 双离子Zn-Cu电解质有效抑制树突并延长循环寿命.
- 与现有技术相比,开发的ZIC提供了高能量密度和卓越的性能.
- 这种电解质显示出对高性能,低维护电化学能量存储的重大承诺.
相关概念视频
Standard Electrode Potentials
43.9K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
43.9K
Electrodeposition
637
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
637
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
Voltaic/Galvanic Cells
57.3K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.3K
MOS Capacitor
789
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...
789
Extraction: Advanced Methods
447
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
447

