Abstract:
A hydrothermal electrochemical synthetic method of lithium cobalt oxide(LiCoO2) is provided to improve the crystallinity and adhesiveness so as to lower the reaction temperature, to eliminate the use of an autoclave, to reduce the reaction time by applying pulse electric current, and to solve dissolution problem in the cathode, thereby providing prolonged use thereof. The hydrothermal electrochemical synthetic method of lithium cobalt oxide comprises an addition of saccharin to an aqueous solution where a lithium salt and a cobalt salt or a cobalt powder are dissolved in water, and an application of pulse electric current during the hydrothermal electrochemical reaction, wherein each of the lithium salt and the cobalt salt is selected from hydroxide, nitrate, acetate, chloride, sulfate, oxalate and mixtures thereof, the saccharin is used in an amount of 1-50ppm, and oxygen gas is bubbled into the aqueous solution by using a bubbler which is possible to be introduced and removed during the synthetic process.
Abstract:
AlNi 또는 AlNi 및 AlNi결정상을포함하는니켈-알루미늄합금을저온에서제조하고리칭함으로써레이니니켈(Raney nickel)과같이표면에기공을가지는다공성합금을제조할수 있는다공성니켈-알루미늄합금분말, 이를이용한탄화수소개질또는수소발생촉매, 펠릿과같은성형체및 반응기, 이를저온으로제조할수 있는방법등이개시된다. 상기다공성니켈-알루미늄합금분말은 BET 표면적, 전체기공부피, 평균기공지름등에서우수한특성을나타내며, 촉매활성저하가없어메탄과같은탄화수소개질또는수소발생촉매로서유용하다. 또한, 상기방법에의하면다공성니켈-알루미늄합금분말을용이하고간단하게저온에서저가로대량제조할수 있다.