Abstract:
An objective of the present invention is to provide a cathode electrode which: is capable of overcoming the limitation of sulfur capacity of a cathode active material using a traditional carbon material, especially extended graphite, to become a conductive material having large surface area, light weight, and high strength. Therefore, by increasing sulfur capacity, the charging and recharging lifespan of a battery can be effectively enhanced.
Abstract:
The present invention relates to a lithium-sulfur battery using a high-ionic solid composite conductor which prevents sulfur having fluidity at high temperature(more than or equal to 120°C) above a melting point from being leaked out so that the lithium-sulfur battery, which is operable at room temperature and even at high temperature, is implemented. Therefore, the said battery can be used without performance degradation, and ion conductivity at high temperature is even increased to improve the output performance of the battery.
Abstract:
The present invention relates to a high-ionic solid conductor for lithium battery and a lithium battery using the same, and more specifically, to a high-ionic solid conductor for lithium battery and a lithium battery using the same which stably secure an ion conduction pathway by minimizing interface resistance and minimize the interface resistance with an electrode active material in the inner region of the electrode. To this end, the present invention comprises: a pore-free part with a compact structure; and at least one multiporous part with a plurality of open pores. The multiporous part has 20-90% porosity.
Abstract:
PURPOSE: A positive electrode for a lithium sulfate secondary battery is provided to minimize self-discharging effect by preventing polysulfide shuffle phenomena, by having a three-dimensional network structure, thereby extending lifetime of a battery. CONSTITUTION: A positive electrode for a lithium sulfate secondary battery containing infiltrated mesoporous carbon nanocomposites with vacant mesoporous carbon has a nanocomposite structure which has pores filled with sulfate particles; and a porous conducting agent, and mesoporous conducting agent with an empty pore, by a mixing volume ratio of 1:0.1-0.9. The mesoporous conducting agent has an average particle diameter of 10 nm - 100 micron, and the porosity thereof is 10-90 %. The average particle diameter of the sulfur particle is 1 nm - 50 micron. [Reference numerals] (AA) Porous conductive material; (BB) Sulfur particle; (CC) Heat treatment; (DD) Sulfur/porous conductive mateiral nanocomposite; (EE) Sulfur/porous conductive material nanocomposite + Porous conductive material; (FF) Binder