电极
锂(药物)
材料科学
粒子(生态学)
离子
电容器
储能
光电子学
纳米技术
电气工程
化学
电压
物理
工程类
功率(物理)
医学
海洋学
有机化学
物理化学
量子力学
地质学
内分泌学
作者
Xiongwei Wu,Songtao Lv,Jiabao Li,Xinli Yi,Xuewen Wu,Jun Li,Jie Zhang,Yu-Han Yu,Bei Long
标识
DOI:10.1016/j.jechem.2023.11.017
摘要
The limited energy density of lithium-ion capacitors poses a significant obstacle to their widespread application, primarily stemming from the inability of the electrodes to simultaneously fulfill both high energy density and rapid charging requirements. Experimental data demonstrate that a directional particle configuration can enhance charging speed while maintaining high-capacity density, but it is rarely discussed. Here, we have developed a particle-level electrochemical model capable of reconstructing an electrode with a directional particle configuration. By employing this method, an investigation was conducted to explore how the spatial morphology characteristics of particle configuration impact the energy storage characteristics of electrodes. Results demonstrate that rational particle configuration can effectively enhance the transport of lithium ions and create additional space for lithium-ion storage. With the same particle size distribution, the best electrode can increase the discharge capacity by up to 132.4% and increase the charging SOC by 11.3% compared to the ordinary electrode under the condition of 6 C. These findings provide a further understanding of the energy storage mechanism inside the anisotropic particle distribution electrode, which is important for developing high-performance lithium-ion capacitors.
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