Abstract: At present, the application range of lithium-ion batteries has been continuously expanded, and its advantages are relatively obvious. Among them, fast-charge lithium-ion batteries have a wide range of application prospects. At present, lithium-ion batteries have important applications in mobile phones, car chargers, and fixed chargers. Based on this understanding, we should recognize the advantages of lithium-ion batteries and focus on the application and development of lithium-ion batteries. To this end, we should thoroughly study the application and development status and development prospects of fast-charge lithium-ion batteries, and focus on the application and development of fast-charge lithium-ion batteries to provide strong support for the application and development of lithium-ion batteries. Keywords: fast charge; lithium-ion battery; application development preface Since the birth of lithium-ion batteries, important applications have been made in many fields. Judging from the current application fields of lithium-ion batteries, not only have they been widely used in electronic products such as mobile phones and chargers, but also have made certain breakthroughs in the fields of vehicle power supplies. Judging from the current market demand for lithium-ion batteries, fast-charging lithium-ion batteries have become an important development direction for lithium-ion batteries. For this reason, the development and application of fast-charging lithium-ion batteries has become an important part of the development of lithium-ion batteries. Based on this understanding, we should seriously study the application and development of fast-charging lithium-ion batteries. 1 Principles and characteristics of fast-charging lithium-ion batteries After researching fast-charging lithium-ion batteries, it is found that the structure and characteristics of fast-charging lithium-ion batteries are mainly manifested in the following aspects: (1) The structure of fast-charging lithium-ion batteries. The structure of fast-charging lithium-ion batteries is similar to that of other batteries. They all use the positive and negative structure. The main difference is that the fast-charge lithium battery pack
is different from other batteries in the choice of positive and negative materials. The overall structure is more complicated than ordinary lead-acid batteries. Li-ion mainly adopts an embedded structure, which not only improves the charging effect of lithium-ion batteries, but also satisfies the charging needs of lithium-ion batteries. (2) The working principle of fast charge lithium ion battery. The principle of lithium polymer battery is the same as that of liquid lithium, the main difference is that the electrolyte is different from liquid lithium. The main structure of the battery includes three elements: positive electrode, negative electrode and electrolyte. (3) The characteristics of fast-charging lithium-ion batteries. Both lithium polymer batteries and lithium ion battery technologies can replace Ni-Gd batteries. But the price is too high, the market has not yet fully accepted, especially the lithium polymer technology. Lithium polymer batteries have a larger capacity than lithium batteries under the same volume, and there is no memory effect at all (lithium ion batteries still have a memory effect, but they are relatively small). Lithium polymer batteries are actually a gel-like substance, which can be easily made into various shapes. And it does not contain harmful heavy metal elements, it is a green battery'. 2 Analysis of the research progress of fast-charge lithium-ion batteries From the current research on fast-charge lithium-ion batteries, its research focuses mainly on positive electrode materials, negative electrode materials and electrolyte materials Several aspects: LiCoO2, LiNiO2 or LiMn2O4 is used for the positive electrode, and LixC6 is used for the negative electrode. The typical battery system is: (1) C | LiPF6-EC+DEC | LiCoO2 (+) Positive reaction: LiCoO2 u003dLi1-xCoO2+xLi++xe- negative electrode reaction: 6C+xLi++xe-u003dLixC6 total battery reaction: LiCoO2+6Cu003dLi1-xCoO2+LixC6 The lithium intercalation compound used as a positive electrode material is a reservoir of lithium ions. In order to To obtain a higher voltage of a single battery, a high-potential lithium intercalation compound should be selected. At present, in the research of cathode materials, the intercalation method of lithium ions and the choice of lithium ion compounds have become an important direction in the research of cathode materials. The performance of the lithium ion polymer battery has an important decisive role. Lithium-ion polymer batteries are generally named with six to seven digits, which respectively indicate thickness/width/height. For example, PL6567100 represents a lithium ion with a thickness of 6.5mm, a width of 67mm and a height of 100mm Polymer battery, where PL indicates that the battery belongs to the polymer category. The production process of lithium ion polymer battery generally uses laminated flexible packaging, so the size change is very flexible and convenient. 3 Application prospects of fast-charge lithium battery pack Li-polymer battery (Li- polymer, also known as polymer lithium battery pack): It has high energy density, smaller size, ultra-thin, lightweight, and high safety and low cost. It is a new type of battery with many obvious advantages. In terms of shape, Lithium polymer batteries have ultra-thin characteristics, and can be made into batteries of any shape and capacity to meet the needs of various products. The minimum thickness that this type of battery can reach can reach 0.5mm. Compared with lithium ion batteries, lithium polymer batteries The features are as follows: (1) There is no battery leakage problem, the battery does not contain liquid electrolyte, and uses colloidal solids. (2) Thin batteries can be made: with a capacity of 3.6V400mAh, the thickness can be as thin as 0.5mm (3) The battery can be designed into a variety of shapes. (4) The battery can be bent and deformed: the polymer battery can be bent at a maximum of about 90°. In recent years, the lithium ion battery is a new type of high-energy storage battery, and its research and development have been achieved Significant progress. The use of traditional electrochemical research methods combined with on-site and off-site spectroscopy methods to evaluate and optimize the design of lithium-ion battery systems will strongly promote the research and application of lithium-ion batteries.
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