Dinh, Hung-Cuong Yeo, In-Hyeong Cho, Won Il Mho, Sun-il 2024-01-19T12:39:33Z 2024-01-19T12:39:33Z 2022-03-07 2010 1938-5862 https://pubs.kist.re.kr/handle/201004/115767 Both nano-sized and micron-sized LiFePO4 crystalline particles with rhombus structure were synthesized by a hydrothermal method for the cathode materials. Coating conductive polymers, such as polypyrrole (PPy) and poly-3,4-ethylenedioxythiophene (PEDOT), on the surfaces of LiFePO4 particles improved the battery capacities by increasing the ionic and electric conductivities of the cathode materials. The nano-sized LiFePO4 coated with PEDOT shows the largest specific capacity (167 mAhg(-1) for initial to 158 mAhg(-1) after 50 cycles), compared to the cases coated with PPy (165 mAhg-1 to 127 mAhg(-1)) and with carbon (152 mAhg(-1) to 147 mAhg(-1)). Compared to the nano-sized particles, the micron-sized particles have much smaller surface-tovolume ratios, which resulted in increased diffusion distance requirements for lithium ions and, also, reduced accessibility of lithium ions. English ELECTROCHEMICAL SOC INC Characteristics of Conducting Polymer-Coated Nanosized LiFePO4 Cathode in the Li+ Batteries Conference 10.1149/1.3490696 1 Symposium on Advanced Organic and Inorganic Materials for Electrochemical Power Sources held during the 217th Meeting of the Electrochemical-Society (ECS), v.28, no.8, pp.167 - 175 Symposium on Advanced Organic and Inorganic Materials for Electrochemical Power Sources held during the 217th Meeting of the Electrochemical-Society (ECS) 28 8 167 175 US Vancouver, CANADA 2010-04-25 ADVANCED ORGANIC AND INORGANIC MATERIALS FOR ELECTROCHEMICAL POWER SOURCES 000354480500020 Proceedings Paper