Abstract:
PURPOSE: A lithium air battery is provided to improve energy efficiency and reduce the charging and discharging overvoltage by including an organic compound capable of absorbing and emitting electrons. CONSTITUTION: A lithium air battery(10) comprises a negative electrode which includes lithium; a positive electrode(150) which uses oxygen as a positive electrode active material; and an organic-based electrolyte(18). The organic-based electrolyte includes an organic compound which can absorb and emit electrons for electrochemical reactions. The reduction potential of the organic compound to lithium metal is 2-3.2 V. The organic compound includes a conjugated system. The content of the organic compound in the organic-based electrolyte is 0.01 mM - 5 M.
Abstract:
PURPOSE: A lithium air battery comprises a catalyst or/and a catalyst support comprising a carbon-based material doped by a non-metallic element, is provided to increase the activity of a catalyst, to retrain overvoltage at charging/discharging, and improving energy efficiency. CONSTITUTION: A lithium air battery comprises a carbon-based material doped by a non-metallic element. A manufacturing method of the positive electrode comprises: a step of preparing mixed solution by mixing non-metallic precursor and hollow porous material into solvent; a step of drying the mixed solution, and forming a plasticized material by plasticizing the dried material under un-activated atmosphere; and a step of contacting the plasticized material to storing acid. A lithium air battery(10) comprises a negative electrode(13) capable of charging/discharging lithium ions, an electrolyte(18), and a positive electrode(15) having oxygen as a positive electrode active material.
Abstract:
PURPOSE: An electrode catalyst for a fuel cell is provided to ensure excellent dispersibility and electrochemical activity by uniformly mixing a first alloy catalyst and a second alloy catalyst on carbon particles, high alloying degree through high pressure reaction, and excellent oxygen reduction reaction due to the small particle size. CONSTITUTION: An electrode catalyst for a fuel cell comprises a carbon-based carrier and catalyst particles dipped in the carrier. The catalyst particles include a first alloy catalyst including palladium(Pd), cobalt(Co) and phosphorus(P); and a second alloy catalyst including palladium(Pd) and phosphorus(P). The first alloy catalyst includes 2~13 weight% of cobalt and 0.2~1.5 weight% of phosphorus based on the total weight of the first alloy catalyst.