石墨
分子动力学
电极
化学物理
氮气
材料科学
动力学(音乐)
兴奋剂
常量(计算机编程)
图层(电子)
纳米技术
化学
计算化学
光电子学
物理
物理化学
复合材料
有机化学
计算机科学
声学
程序设计语言
作者
Legeng Yu,Nan Yao,Yuchen Gao,Zhongheng Fu,Bo Jiang,Ruiping Li,Cheng Tang,Xiang Chen
标识
DOI:10.1016/j.jechem.2024.01.058
摘要
Electric double layer (EDL) is a critical topic in electrochemistry and largely determines the working performance of lithium batteries. However, atomic insights into the EDL structures on heteroatom-modified graphite anodes and EDL evolution with electrode potential are very lacking. Herein, a constant-potential molecular dynamics (CPMD) method is proposed to probe the EDL structure under working conditions, taking N-doped graphite electrodes and carbonate electrolytes as an example. An interface model was developed, incorporating the electrode potential and atom electronegativities. As a result, an insightful atomic scenario for the EDL structure under varied electrode potentials has been established, which unveils the important role of doping sites in regulating both the EDL structures and the following electrochemical reactions at the atomic level. Specifically, the negatively charged N atoms repel the anions and adsorb Li+ at high and low potentials, respectively. Such preferential adsorption suggests that N-doped graphite can promote Li+ desolvation and regulate the location of Li+ deposition. This CPMD method not only unveils the mysterious function of N-doping from the viewpoint of EDL at the atomic level but also applies to probe the interfacial structure on other complicated electrodes.
科研通智能强力驱动
Strongly Powered by AbleSci AI