The invention of rechargeable battery, whether the early lead-acid battery, nickel hydrogen battery, nickel cadmium battery or currently widely used lithium-ion battery, has significantly changed our way of life, especially in the field of mobile life, mobile phones, laptops, new energy vehicles and various digital products have accelerated our cooperation, communication and development. Whether in the field of mobile travel or in the field of mobile digital electronic products and equipment, lithium-ion batteries play the "heart" function of devices. The academic community is also in the process of continuous research and development for the battery system with higher specific energy, especially the research of solid-state battery, lithium sulfur battery, lithium air battery and other new systems based on the metal lithium anode. The development of battery can not be separated from the invention of positive and negative electrode materials. The electrode / electrolyte interface also plays an important role in the development of battery. Both in academia and industry attach great importance to the important function of electrode interface in battery life. However, the field of electrode interface research is mostly focused on the nanoscale. The limitations of research technology and the dynamic characteristics of the interface itself with time and potential lead to the understanding of the interface in the field is still in the primary stage. The development process and research ideas of electrode / electrolyte interface need to be systematically reviewed and summarized.
Professor Huang Jiaqi of Beijing University of science and technology and his research team have always focused on the electrode / electrolyte field, which is very difficult to study. In recent years, a lot of original research work has been carried out, which broadens the new cognition of the formation mechanism of the interface, and puts forward the control strategy and relevant design criteria of artificial interface design. At the invitation of advanced functional materials, Professor Huang Jiaqi and his research team recently published a research progress report entitled "Howard critical electric / electronic interfaces in rechargeable batteries" online, which comprehensively reviewed the formation mechanism and regulation methods of electrode / electrolysis interface of rechargeable batteries.
This paper reviews the research progress of CEI and SEI in rechargeable system in recent years (Figure 1). In view of the possible formation mechanism of the electrode electrolyte interface, two key factors influencing the formation of the interface are proposed in this paper: the initial species adsorption on the electrode surface and the solvation coordination structure of the electrolytic liquid phase; meanwhile, the current structure, chemical composition and possible transmission mechanism of the interface are systematically discussed, and the characteristics of different structures and the The influence of solid-liquid interface on lithium ion transport and deposition / desorption behavior; finally, the author summarizes the key interface control strategies in the current field, and looks forward to the future design criteria of artificial interface. This work is helpful to improve the basic understanding of the interface in the field, expand the subject knowledge, provide a reasonable scientific basis for the design of the electrode / electrolyte interface, and inspire the reasonable design of long-term cycle charging battery. Relevant papers were published online on advanced functional materials (DOI: 10.1002/adfm.201909887). Guess you like it
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