119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists Ⅰ
Room No. 303호
Time THU 10:26-:
Code ANAL1.O-36
Subject Excellent electrochemical performance and wide operating voltage of phosphate-borate hybrid cathode material for Li-ion battery
Authors 지민수, 이영일*
울산대학교 화학과, Korea
Abstract Olivine LiMPO4 (M=Fe, Mn, Co, Ni, etc.) based cathode materials for lithium ion battery widely investigated for electric vehicles and electronic device due to low cost, safety and structural stability. This work reports for the first time lithium iron phosphate and lithium iron borate as a hybrid cathode material. The material has been synthesized without using external carbon source to improve specific discharge capacity with wide operating voltage range. LiFe(PO4)0.5(BO3)0.5 exhibits a remarkably high specific discharge capacity near the theoretical capacity (97.3%) of 189.8 mAh g-1 at 0.1 C. X-ray diffraction and NMR spectroscopy of the pristine material revealed mixed phase of olivine and vonsenite structures. The electrochemical performance of the LiFe(PO4)0.5(BO3)0.5 showed also polymorphism with two different structured materials. The LFBP cathode material can meet the requirements for high power applications, such as electric vehicles and energy storage for smart grids in the near future.
E-mail jimindol01@gmail.com