相关实验视频

Updated: Jul 8, 2025

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

使用循环碳添加剂作为旋风分离器,在离子电池中实现快速化和脱化,而无需状物生长

Jiacheng Gong¹, Jiabao Zhu¹, Xiao He^1,2

¹Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China. jryang@chem.ecnu.edu.cn.

|December 11, 2023

概括

一种新型的碳二氧化碳 (cyclocarbon) 增强了离子电池阳极,通过防止树突的生长来增强离子电池. 它促进了快速的离子传输,并且与石墨相容,使充电更安全,更快.

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
计算化学计算化学

背景情况:

碳材料对于离子电池阳极至关重要,但在快速充电过程中形成树石会阻碍性能和安全.
现有的减轻树突的策略往往会阻碍离子扩散或缺乏与石墨阳极的兼容性.

研究的目的:

引入循环碳,一种新型碳基,作为先进电池阳极的潜在添加剂.
使用计算方法研究循环碳的电化学特性和离子相互作用机制.

主要方法:

密度函数理论 (DFT) 计算以确定原子和+离子亲和力.
开始分子动力学 (AIMD) 模拟来分析离子运输和化/脱化过程.
通过π-π相互作用评估循环碳素与石墨电极的兼容性.

主要成果:

循环碳对Li原子的亲和力明显高于Li+离子,由电荷转移到它的π轨道驱动.
+离子在循环碳中自由穿,而原子的化速度很快 (比秒).
原子的脱是电压关闭和可控制的;环碳显示与石墨的 π-π 兼容性.

结论:

循环碳为开发更安全,超快速的可充电离子电池提供了一个有前途的新途径.
它独特的电化学特性和兼容性使其适用于离子,离子和离子电池.
循环碳解决了树岩沉积问题,而不影响离子扩散或石墨相容性.

更多相关视频

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

Published on: May 22, 2018

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

相关概念视频

Cycloaddition Reactions: Overview

Cycloaddition Reactions: Overview

Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.

Anionic Chain-Growth Polymerization: Overview

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...