پديدآورندگان :
Mohammadi Mohammad Reza Department of Chemistry, Tarbiat Modares University, Tehran, Iran , Zeinodiny Ali Department of Chemistry, Tarbiat Modares University, Tehran, Iran , Javadian Soheila Department of Chemistry, Tarbiat Modares University, Tehran, Iran
كليدواژه :
Lithium , ion batteries , Sealf , healing , Lithium energy storage , Binders
چكيده فارسي :
The interplay of several mechanisms linked to the mechanical, chemical, and thermodynamic instability of materials results in complex battery degradation. Numerous inherent and environmental factors influence their deterioration kinetics and processes. Preventive measures such as artificial interphases, coatings, additives, or materials that function within the thermodynamic stability voltage window can reduce the rate of battery cell breakdown. Because battery cells function in many settings, aging and degradation processes are inevitable, much like in most systems and applications. Numerous branches of material research have demonstrated self-healing capabilities, which greatly enhance battery cell efficiency. While some of them have been shown in experimental settings, other degradation processes have only been addressed through the creation of preventive measures. The development of self-healing functions should concentrate on altering nonactive materials, ideally using BioSource materials to reduce environmental effect, as these features add weight and expense to the battery cell. Sensor-based deterioration detection and the vectorization and controlled release of self-healing components are important issues. Furthermore, it is imperative to take into account a trigger mechanism for extrinsic self-healing components in conjunction with their manufacturability and recyclability from the outset of the development phase. In the following, for research, we can refer to self-healing binders to repair degradation, because Self-healing binders with a strong chemical bonding active materials are another promising direction to alleviate the pulverization of Anodic and cathodic active materials for example silicon anode. So far, beyond conventional PVDF, various functional binders such as sodium carboxyl methylcellulose, poly acrylic acid (PAA), polyethylene glycol (PEG), polyamide imide, guar gum, and sodium alginate have been comprehensively investigated. These binders show enhanced cohesive capability with Si particles via hydrogen bonds and/or covalent bonds. In this strategy, the Si particle size appears to be an important parameter to consider. The cycling stability of nano-Si has been improved by using carboxyl methylcellulose (CMC) as it can bond to oxygen on the Si However, CMC is not effective for micrometer-sized Si because it cannot bond to the cracked Si because of the lack of oxygen on the freshly pulverized Si surface. Similar issues have been found with other natural polymers[1].
