相关实验视频

Updated: May 26, 2025

Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology

Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology

Published on: December 7, 2015

从低温CO2的快速转化中获得的带有增加层间距的石墨碳,用于高性能储存

Zhenzhe Wei¹, Yu Shi¹, Peng Li²

¹Zhejiang Carbon Neutral Innovation Institute & Zhejiang International Cooperation Base for Science and Technology on Carbon Emission Reduction and Monitoring & College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.

Journal of colloid and interface science

|February 23, 2025

概括

研究人员开发了一种低碳方法,用于制造离子电池 (PIB) 的石墨碳. 这种新的阳极材料表现出卓越的稳定性和性能,在1000个循环后保持95.9%的容量.

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:

由于其导电性和稳定性,石墨碳是离子电池 (PIB) 的有前途的阳极.
离子的大半径会在电池循环过程中对石墨碳结构造成不可逆转的损伤.
现有的制备方法往往缺乏效率或涉及高碳足迹.

研究的目的:

开发一种新的,低碳合成路径,用于石墨碳,对PIBs具有增强的特性.
研究CO2/NaAlH4比对石墨碳结构和形态学的影响.
为了评估合成的石墨碳作为PIBs中的阳极材料的电化学性能.

主要方法:

在大约62°C时,二氧化碳 (CO2) 和化 (NaAlH4) 之间的快速化学转化反应.
由此产生的石墨碳的表征,重点关注格子间距,石墨化程度和形态学.
材料作为离子电池电极的电化学测试,评估循环稳定性和速率性能.

主要成果:

通过使用低碳方法,成功合成了具有更大的格子间距的石墨碳.
发现CO2/NaAlH4比率对于控制石墨化和实现薄片形态至关重要.
准备好的石墨碳阳极表现出极好的循环稳定性,在0.1 A g-1.1的1000个循环后保持95.9%的容量 (210 mAh g-1).

结论:

开发的CO2/NaAlH4快速转化方法为生产先进的石墨碳阳极提供了一个高效和低碳的途径.
增强的石墨碳表现出优越的电化学性能和稳定性,用于离子电池应用.
这种方法为设计下一代储能材料提供了宝贵的见解.

关键词:

极材料是一种极材料.转换过程中的二氧化碳 (CO2) 转换.石墨碳是一种石墨碳.离子电池是一种离子电池.

更多相关视频

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Published on: May 15, 2018

Preparation of Carbon Nanosheets at Room Temperature

Preparation of Carbon Nanosheets at Room Temperature

Published on: March 8, 2016

相关概念视频

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

Carbon Skeletons

Carbon Skeletons

Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...

¹³C NMR: ¹H–¹³C Decoupling

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

Carbon-13 (¹³C) NMR: Overview

Carbon-13 (¹³C) NMR: Overview

Carbon-13 is a naturally occurring NMR-active isotope of carbon with a low natural abundance of 1.1%. In contrast, carbon-12 is the most abundant isotope of carbon with zero nuclear spin. Therefore, it is NMR inactive. The gyromagnetic ratio of carbon-13 is smaller than that of protons. As a result, carbon-13 resonance is about 6000 times weaker than proton resonance. For a given magnetic field strength, the resonance frequency of carbon-13 is about one-fourth of the resonance frequency for...

Phase Diagrams

Phase Diagrams

A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...

Conformations of Cycloalkanes

Conformations of Cycloalkanes

Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...