Jan 08, 2019 Pageview:659
With the increasing demand of energy storage devices and the relative scarcity and uneven distribution of lithium resources, people began to think of a new type of energy storage battery to replace the currently widely commercialized lithium ion battery. Low price and relative safety have been widely concerned and studied. Aluminum battery, as the electrolyte drainage device of aluminum ion battery, was mainly concentrated on the aqueous solution of aluminum salt in the early research. However, the electrolytes used for aluminum corrosion cathode seriously affect the battery service life and stability. In order to solve these problems, a new liquid electrolyte of Methylimidazole salt ions was proposed and applied to aluminum ion batteries, and its performance was greatly improved. However, the current research is still in the initial stage. Not only does the graphite current attach great importance to the discharge capacity of aluminum batteries(70-150mag-1), but also the cyclic stability and side effects of aluminum battery electrodes are studied. Therefore, the development of more suitable cathode materials for aluminum ion batteries is the focus of current research.
In collaboration with researchers including Wanglianzhou and Huyuxiang, etc., the project team at the University of Queensland and the Peng Shengjie team of professors at Nanjing University of Aeronautics and Astronautics, a fine mechanical flexible multi-stage porous structure with graphite self-supporting, non-binder electrodes(Co 9s8@cnt-cnf) was designed. For the first time, the anode structure material used in aluminum ion batteries has its own advantages, which effectively avoids the influence of the common electrode collector and binder in aluminum ion batteries on the overall performance of the battery. Due to its porous structure and the overall structure of carbon supporting electrolyte penetration, more reaction site exposure and electron transmission greatly accelerate the process of electrode dynamics. At the current density of 100mag-1, the initial emission capacity can reach a maximum of 315 mag-1, while the 200 after the loop maintains a capacity of 297 mag-1. Even if the charging and discharge speed increases tenfold at the current density of the AG-1, the initial discharge capacity is 154 Marger-1, which remains unchanged after 6,000 laps of 87 Marger-1. It is now reported as the most stable type of graphite aluminum battery material. In this paper, by characterizing the system and comparing it with the original electrode, it is proved that the positive electrode has a good electrochemical stabilization mechanism in aluminum ion cells. In short, a new self-supporting, non-binder electrode(Co9S8 @ CNT - CNF) is a promising aluminum ion anode material and also provides research results on aluminum ion battery anode materials.
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