Abstract:
본 발명은 리튬 분말과 실리카 분말을 반응시켜 실리카의 산소가 리튬으로 전달되는 산소 교환반응 (single displacement)을 통하여 나노 실리콘계 화합물 분말을 형성하고, 이를 이용하여 그래핀 및 탄소섬유를 포함하는 제조되는 나노 실리콘계 화합물-그래핀-탄소섬유 복합재, 이의 제조방법 및 상기 복합재를 함유한 음극활물질을 포함하는 리튬이차전지에 관한 것이다.
Abstract:
The present invention relates to a nanosilicon based compound-graphene-carbon fiber composite which is obtained by producing nanosilicon based compound powder by oxygen exchange reaction (single displacement) of transferring oxygen of silica to lithium through making lithium powder react with silica powder, and producing graphene and carbon fibers; a production method thereof; and a lithium secondary battery including a negative electrode active material which contains the nanosilicon based compound-graphene-carbon fiber composite.
Abstract:
본 발명에 따른 전이금속산화물 나노입자의 제조방법은 전이금속을 반응물로 하며, 상기 전이금속을 과산화수소수에 용해시킨 퍼옥시-메탈레이트(peroxi-metallate) 용액에 알코올, 물 및 산을 함유한 반응 용액을 첨가하고 수열 반응시켜 전이금속 산화물 나노 입자를 제조하는 특징이 있다. 상세하게, 본 발명에 따른 제조방법은 a) 전이금속 분말을 반응물로 하여, 상기 전이금속 분말을 과산화수소수에 용해시켜 0.001 내지 0.2몰의 전이금속 몰 농도를 갖는 퍼옥시-메탈레이트(peroxi-metallate) 용액을 제조하는 단계; b) 상기 퍼옥시-메탈레이트 용액에 알코올, 물 및 산을 함유한 반응용액을 첨가하여 혼합용액을 제조하는 단계; 및 c) 상기 혼합용액을 수열 반응시켜 전이금속 산화물 나노 입자를 제조하는 단계;를 포함하여 수행되는 특징이 있다. 전이금속 산화물, 나노입자, 수열반응, 전이금속 반응물
Abstract:
The present invention relates to a cathode active material comprising silicon nanoparticles and a siloxane layer formed on the surface of the silicon nanoparticles, to a method for manufacturing the same, and a secondary battery using the cathode active material. The cathode active material according to the present invention has the siloxane layer on the surface of the silicon nanoparticles, to prevent the capacity drop of the battery to improve the charge and discharge properties and lifetime properties of the battery, moreover, to have an excellent dispersibility to be uniformly dispersed during manufacturing a cathode to improve the workability.
Abstract:
PURPOSE: A method for synthesizing transition metal oxide nanoparticles is provided to enable a user to easily handle the transition metal oxide nanoparticles, to control reactivity, and to obtain the transition metal oxide nanoparticles of high purity. CONSTITUTION: A method for synthesizing transition metal oxide nanoparticles comprises the following steps: manufacturing a peroxi-metallate solution having a transition metal molar concentration of 0.001-0.2 mol by dissolving transition metal powder on hydrogen peroxide using the transition metal powder as a reactant; manufacturing a mixed solution by adding a reactive solution including alcohol, water, and acid to the peroxi-metallate solution; and manufacturing the transition metal oxide nanoparticles through a hydrothermal reaction of the mixed solution.