Safaeipour Sepideh, Shahpouri Elham, Kalantarian Mohammad Mahdi, Mustarelli Piercarlo
Department of Ceramic, Materials and Energy Research Center, PO Box 31787-316, Karaj, Iran.
Department of Materials Science, University of Milano-Bicocca, GISEL-INSTM, Viale Cozzi 55, 20125, Milano, Italy.
Chempluschem. 2024 Sep;89(9):e202400251. doi: 10.1002/cplu.202400251. Epub 2024 Jun 28.
For independency from the fossil fuels and to save environment, we need to move toward the green energies, which requires better energy storage devices, especially for usage in electric vehicles. Li-ion and beyond-lithium insertion batteries are promising to this aim. However, they suffer from some inherent limitations which must be understood to allow their development and pave the way to find suitable energy storage alternatives. It is found that each positive or negative electrode material (cathode or anode) of the intercalation batteries has its own behavioral (charge-discharge) properties. The modification of preparation parameters (composition, loading density, porosity, particle size, etc.) may improve some aspects of the electrode performance, but cannot change the intrinsic property of the electrode itself. Accordingly, these properties are called as the "inherent behavior characteristics" of the active material. It is concluded that the behavior of a specific electrode substance, even following different preparation routes, depends only on diffusion mechanisms. This work shows that the inherent electrode properties can be visualized by representation of current density vs. capacity.
为了摆脱对化石燃料的依赖并保护环境，我们需要转向绿色能源，这需要更好的能量存储设备，特别是用于电动汽车。锂离子电池及锂以外的嵌入型电池有望实现这一目标。然而，它们存在一些固有的局限性，必须了解这些局限性才能推动其发展，并为寻找合适的能量存储替代品铺平道路。研究发现，嵌入型电池的每个正负极材料（阴极或阳极）都有其自身的行为（充放电）特性。制备参数（组成、负载密度、孔隙率、粒径等）的改变可能会改善电极性能的某些方面，但无法改变电极本身的固有特性。因此，这些特性被称为活性材料的“固有行为特征”。可以得出结论，特定电极物质的行为，即使遵循不同的制备路线，也仅取决于扩散机制。这项工作表明，通过绘制电流密度与容量的关系图可以直观地看到电极的固有特性。
