使用结合水的纤维素纳米纤维超级电容器的高能储能容量
Mikio Fukuhara1, Tomonori Yokotsuka2, Takuya Takashina3
1New Industry Creation Hatchery Center, Tohoku University, Sendai, 980-8579, Japan. mikio.fukuhara.b2@tohoku.ac.jp.
Scientific reports
|October 3, 2023
概括
封闭水对于纤维素纳米纤维 (Na-ACF) 超级电容器至关重要,增强能量储存. 这种结合的水在高温下蒸发会导致性能降低和电阻增加.
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:
- 电气双层电容器和离子电池在较高湿度下表现较低.
- 纤维素纳米纤维 (Na-ACF) 材料为储能应用提供了潜力.
研究的目的:
- 调查结合水在Na-ACF超级电容器储能特性中的作用.
- 了解温度对这些超级电容器性能和稳定性的影响.
主要方法:
- 红外和近红外光谱学.
- 核磁共振光谱学 核磁共振光谱学
- 交替电流阻抗分析分析
- 第一个原则计算计算.
主要成果:
- 随着温度的增加,储存能力下降,在483 K以上达到零.
- 电阻随着温度的增加而显著增加,尼奎斯特和波德图的变化证明了这一点.
- 对于Na-ACF超级电容器至关重要的受限水在升温时会蒸发,形成Na2O并增加带隙能量.
结论:
- 封闭水对于Na-ACF超级电容器的最佳性能和稳定性是必要的.
- 与传统电池不同,Na-ACF超级电容器从结合水的存在中受益.
- 温度诱导的结合水的蒸发是超级电容器性能降低的主要原因.
更多相关视频
08:59Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
Published on: November 30, 2022
4.5K
11:27Synthesis Method for Cellulose Nanofiber Biotemplated Palladium Composite Aerogels
Published on: May 9, 2019
8.1K
相关概念视频
Energy Stored in a Capacitor: Problem Solving
1.1K
In 1749, Benjamin Franklin coined the word battery for a series of capacitors connected to store energy. Capacitors store electric potential energy that can be released over a short time. This property means capacitors have a wide range of applications.
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor of...
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor of...
1.1K
Energy Stored in a Capacitor
3.7K
When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
3.7K
Energy Stored in Capacitors
518
A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
518
Cellulose and Pectic Polysaccharides
3.6K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.6K
MOS Capacitor
825
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...
825
Chemistry of Carbohydrates
72.9K
Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
72.9K
