机器学习辅助的材料发现富含氧气的高度多孔的碳活性材料用于水性超级电容器
Tao Wang1,2, Runtong Pan3, Murillo L Martins4,2
1Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
Nature communications
|August 1, 2023
概括
机器学习加速了为超级电容器开发先进的多孔碳的发现. 这种数据驱动的方法使得能够合成具有异常电容的高度多孔的碳电极,接近ML预测.
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
- 计算科学 计算科学
背景情况:
- 由于其功率,稳定性和广泛的工作温度,多孔碳是超级电容器的理想选择.
- 碳材料的传统开发是缓慢而昂贵的.
- 机器学习提供了一个数据驱动的替代方案来优化材料特性.
研究的目的:
- 开发一种以机器学习为指导的战略,用于合成先进的多孔碳.
- 为超级电容器应用创造高性能碳电极.
- 为了研究结构-属性关系,控制超级电容器的性能.
主要方法:
- 利用机器学习来识别理想碳材料的关键特征.
- 使用胺和聚合物前体合成高度多孔的碳 (>4000 m2/g).
- 采用相位电化学光谱学和准弹性中子散射来进行表征.
主要成果:
- 实现的特定表面积超过4000 m2/g.
- 制造了一个碳电极 (负载为0.7 mg/cm2),其高特异电容为610 F/g在1M H2SO4.4.
- 证明了ML预测与实验结果密切一致.
结论:
- 机器学习显著加快了超级电容器多孔碳的设计和优化.
- 开发的激活策略产生了高性能碳电极.
- 进一步的研究可以利用ML来定制超级电容器材料设计.
更多相关视频
12:00Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
12.4K
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
相关概念视频
Capacitors and Capacitance
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
Energy Stored in a Capacitor: Problem Solving
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...
Capacitors
Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
MOS Capacitor
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...
