Abstract:
본 발명은 다공성 중공구조의 나노 섬유를 가지는 리튬이차전지용 양극활물질 및 그 제조 방법에 관한 것으로서, 보다 상세하게는 리튬이차전지용 양극활물질의 제조방법에 있어서, 고분자를 포함하는 제1용액과 금속염과 고분자를 포함하는 제2용액을 제조하는 단계; 이축 노즐의 내측 노즐로 제1용액을 주입하고, 이축 노즐의 외측 노즐로 상기 제2용액을 주입하는 단계; 상기 이축 노즐에 주입된 상기 제1용액과 상기 제2용액을 전기방사하여 전구체를 제조하는 단계; 상기 전구체를 열처리 건조하여 유기물과 불순물을 제거하는 단계; 및 상기 전구체를 소성로에서 불활성 기체 또는 공기 중에서 소성시키는 단계를 포함하는 것을 특징으로 하는 나노섬유 형태를 갖는 리튬이차전지용 양극활물질의 제조방법에 관한 것이다.
Abstract:
The present invention relates to a manufacturing method of positive electrode active material which has a shape of nanofiber having a large superficial dimension by using an electric radiation method. The present invention comprises: a first step of manufacturing a core viscous solution by mixing a source material measured as stoichiometric ratio according to an empirical formula which is represented as: LiFe1-xMxPO4 (0
Abstract:
PURPOSE: A manufacturing method of an anode active material is provided to manufacture a lithium-iron-metal phosphate-carbon composite nanofiber anode active material with a large surface area by controlling the lithium-iron-metal phosphate-carbon composite to the nanofiber form using electric radiation. CONSTITUTION: A manufacturing method of a lithium-iron-metal phosphate-carbon composite nanofiber anode active material using electric radiation comprises: a first step of making a viscid solution by mixing a raw material, which is quantified by stoichlometric ratio with the empirical formula: LiFe1-xMxPO4 (0
Abstract:
PURPOSE: A manufacturing method of a positive active material is provided to manufacture a Li[Ni1/3Co1/3Mn1/3]O2 positive active material with improved surface area and high voltage performance by using an electrospinning method. CONSTITUTION: A manufacturing method of a Li[Ni1/3Co1/3Mn1/3]O2 positive active material comprises a step of preparing a solution including a precursor of the Li[Ni1/3Co1/3Mn1/3]O2 positive active material; a step of electrospinning the solution and drying the solution to manufacture nanofiber; and a step of heat-treating the dried nanofiber. The heat-treatment step consists of a first heat treatment at 450-550 °C and a second heat treatment at 600-900 °C and is conducted under an oxygen atmosphere. [Reference numerals] (AA) Preparing raw material; (BB) Mixing and stirring; (CC) Electric radiating; (DD) Drying and pulverizing; (EE) Heat treating (Air/O_2 atmosphere)