Breakthrough point of lithium battery technology

Laptops, smartphones and tablets, MP3, MP4, PSP, digital cameras, camcorders and other mobile devices are rapidly spreading, and the future trend of electric vehicles, and their own batteries can’t live, although the development of mobile power supplies makes up for the shortcomings, so mobile The power supply has also expanded rapidly, and is closely related to the capabilities of mobile power and lithium batteries, so the technology of lithium batteries has become the focus of many technology and operations people. A simple lithium battery is composed of positive electrode, negative electrode, gap and electrolyte, so lithium battery skills can be divided into positive electrode skills, negative electrode skills, gap skills and electrolyte skills. Without major changes in the battery structure, the development of data technology has promoted the development of lithium battery technology in the past few years. Thanks to the serious discussion of new data and new technologies, the key technologies of lithium batteries are now first in the hands of Japanese manufacturers. The important positive data of lithium ion is lithium cobalt oxide, which has the advantages of stable discharge, high energy density, good cycle performance, and high working voltage. The most important cathode data is graphite data, which has a high specific capacity, is cheap and easy to obtain. Most of the positive electrode data is currently being developed and will not replace lithium cobalt oxide in lithium batteries in mobile products in a short period of time, while the negative electrode data is regarded as a key critical point in the practical application of tin-gold and silicon-based alloys. Widely expected. In 2011, Sony Corporation of Japan began batch processing of 18650 batteries, using tin-based alloys, with a capacity density of 723WH/L per unit volume. Panasonic also plans to process 18650 batteries with silicon-based alloys in 2012. Therefore, mobile power technology has made new breakthroughs. Fast charging technology is also the research direction of many companies. Many people previously believed that fast charging technology will be important for electric vehicles, and smart mobile devices will not be in great demand. However, with the rapid popularity of smart phones and tablet computers, short battery life and long charging times have become a headache for many users. The treatment should be from two aspects: on the one hand, the development plan of the battery is suitable for fast charging, including the positive and negative Poles selection, modified by macroporous/mesoporous data, the improvement of notch materials and hole planning, and all solid electrolytes. Choose accustomed to high current, and so on. The other is the use of double-layer capacitors (or supercapacitors) in mobile devices, which support fast charging and protect lithium batteries from instantaneous large currents. Wireless charging is also considered to be the next generation of promising charging technology, and is regarded as a key research and development direction by many companies. The existing standards are not uniform and the conversion power is low. In the future development, this trust will be greatly broken. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What conditions should a qualified lithium battery meet in terms of safety performance?