Secrets of lithium iron manganese phosphate battery technology

In early August, the media reported that the new energy automobile industry interviewed BYD Chairman Wang Chuanfu at the Hunan Shaoshan Sanji Engineering Work Conference and the news of the lithium iron manganese phosphate cathode materials, which caused important securities newspapers, websites and agencies. Professional, only one week. News more than a hundred media reports and hundreds of articles have also caused great concern in the capital market. Is the energy density of lithium batteries really increasing? Is it lithium iron phosphate or lithium iron manganese phosphate? Will the material change? For this reason, the media interviewed Dr. Weifeng Fan, Technical Director, Chengdu Xingneng New Materials Co., Ltd., Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences . Lithium iron phosphate is not a single case. BYD’s new technology iron-manganese phosphate lithium battery is the peak of disclosure. Dr. Fan said that it is not lithium iron phosphate, which is composed of lithium and other types of metal ions, compound phosphates, and sales of fertilizers and dihydrogen phosphate in the market. Ammonium, ammonium phosphate, etc.) are similar, but different solubility calculations, so some people may say that lithium iron phosphate phosphate fertilizer uses fertilizers, but in fact, the solubility of lithium iron phosphate is very poor and does not release soil components. Of available phosphorus. Fan believes that because phosphoric acid groups have more oxygen ions and coordination spaces, they can often form spatial polymer structures with transition metal ions, so these ions belong to another type of polyanionic compounds (polyanionic anode materials). The polyanion positive electrode is a large lineage of BYD’s new technology iron-manganese phosphate lithium battery. Dr. Fan has no peak value. M stands for replacing the previous iron, manganese, cobalt, nickel, copper, chromium, such as any metal element, M is Base metals, chemical structure, safe March and lithium ion channels can be used as anode materials for lithium batteries, but with different capacities, voltages, and ratios of performance, different life phosphates, lithium iron manganese or lithium iron manganese, right? Dr. Fan Weifeng believes that any form of title is not important. The key is after all the ratio of iron to manganese. At present, there is no similar three materials (532, 111, 811, etc.). There is a clear consensus on the ratio of iron to manganese. In what is the best? Because lithium iron manganese phosphate has good stability and performance has not been manufactured, perhaps the real use of lithium manganese phosphate in the future is more metal complex phosphates. BYD’s new technology of iron-manganese phosphate lithium battery discloses BYD’s new technology of iron-manganese phosphate lithium battery. Is it true that the disclosure of the technology is true? The theoretical specific capacity of lithium iron phosphate is 170mAh/g, the discharge path is 3.4v, and the energy of the material The density is 578Wh/kg. The theoretical specific capacity of lithium manganese phosphate is 171mAh/g, the discharge path is 4.1v, and the material energy density is 701Wh/kg, which is 21% higher than the former. Dr. Fan Weifeng analyzed the battery network in my country. The energy density of the existing lithium iron phosphate batteries is 90wh/kg-130wh/kg. According to the 21% improvement of the material energy density, even pure lithium manganese phosphate has the highest energy density. It can only reach about 150wh/kg, and the energy density of lithium manganese phosphate batteries can only be less than 150wh/kg. Regarding lithium iron phosphate batteries, if the assumed best strategy (150Wh/kg) is compared with the current worst strategy (90Wh/kg), the maximum improvement can be estimated to be 67%, but obviously this assumption can only be an assumption. 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: Five precautions for battery maintenance