Presentation Title: Research on the Roles of Niobium in Phosphate Cathode Materials

Abstract: 

For phosphate cathode materials, modification is generally carried out through ion doping and surface coating..In modified ions, niobium can form ion pairs with various electric dipole moments due to its multiple valence states, and affect the shape of the lattice through changes in ionic scale, thereby affecting the migration rate of ions by altering the transition channels of lithium and sodium. This report provides an overview of the doping effect of niobium in phosphate cathode materials, such as lithium iron phosphate, lithium manganese iron phosphate, lithium vanadium phosphate, and sodium iron phosphate. Niobium mainly acts as a dopant by changing the Fermi level of the crystal and expanding ionic transition channels. Co-doping niobium with other metals in a "small amount and multiple elements" is an important direction for future doping applications.

Bio:

Guangchuan Liang, professor, doctoral supervisor. The current director of the Institute of Energy and Environmental Protection Materials at Hebei University of Technology and the chairman of Tianjin Xianzhong New Energy Technology Co., Ltd. He won the honorary titles of 2015 and 2020 Mount Taishan Industrial Leading Talents in Shandong Province, "three three three" talents in the new century in Hebei Province, outstanding postdoctoral fellows in Hebei Province, middle-aged and young backbone teachers in colleges and universities in Hebei Province, and outstanding inventors in Hebei Province. He was appointed as Secretary General of the Ecological Environment Materials Professional Committee of the Chinese Instrument Society, Chairman of the Chemical Power Measurement Testing Professional Committee of the Shandong Metrology and Testing Society, and Vice Chairman of the Ecological Environment Materials Professional Committee of the Tianjin Ceramics Society. He engaged in research on lithium-ion batteries and materials for many years. As the host, he has undertaken projects such as the "Science and Technology Assistance 2020" special project of the Ministry of Science and Technology of China, the "863" plan of China, the Natural Science Foundation of Hebei Province, and the Science and Technology Support Program of Shandong Province. He received 8 provincial and ministerial level scientific and technological awards. More than ten technological achievements have been industrialized and transformed in multiple provinces and cities across the country, generating significant economic value and social benefits. He published over 40 high-level papers indexed in SCI, obtained over 40 patent authorizations, and published 5 monographs.