What are the requirements for lithium battery cathode materials?

Requirements for Lithium Battery Cathode Material The important components of lithium battery are positive electrode, negative electrode, electrolyte, separator, etc. The storage and release of lithium ion energy is realized in the form of redox reaction of electrode material, and the positive electrode active material is the most critical part of lithium battery. Core material. Generally speaking, the key performance indicators of cathode materials include: chemical composition, crystal structure, particle size distribution, tap density, specific surface area, pH value, first discharge specific capacity, first charge and discharge efficiency, cycle life, etc. In the research of lithium battery cathode materials, the American scholar Professor GOODENOUGH, the father of lithium batteries, has made a great contribution: in 1980, he discovered that lithium cobalt oxide can be used as a lithium battery cathode during his inauguration at Oxford University in the United Kingdom. He mentioned in the LCO patent the following year The feasibility of lithium nickelate as a cathode material; in 1983, he tried to use lithium manganate as a cathode material for lithium batteries for the first time; in 1997, he developed the olivine structure cathode material lithium iron phosphate. In addition, in order to solve the problem of instability in the performance of lithium nickelate, Professor DAHN of Canada and Professor Tsuki Otsuki of Japan conducted a large number of doping modification studies; In 1997, Toda Corporation of Japan took the lead in applying for the earliest patent of nickel cobalt lithium aluminate In 1999, Liu Zhaolin, Yu Aishui and others of the University of Singapore introduced Mn modification on the basis of lithium nickel cobalt oxide, and they were the first to report lithium nickel cobalt manganese oxide. The positive electrode is the core component of the battery, and its pros and cons directly affect the battery performance. Generally speaking, the positive electrode active material has the following requirements: 1. Allow a large amount of Li+ insertion and extraction (large specific capacity); 2. Have a higher oxidation-reduction potential (high voltage); 3. The insertion and extraction reversibility is good, and the structure change is small ( Long cycle life); 4. High lithium ion diffusion coefficient and electronic conductivity (low temperature, good rate characteristics); 5. High chemical/thermal stability, good compatibility with electrolyte (good safety); 6. Abundant resources , Environmentally friendly and cheap (low cost, environmentally friendly). Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to properly maintain the UPS battery in the computer room?