公开(公告)号：KR100298146B1

公开(公告)日：2001-09-26

申请号：KR1019990008487

申请日：1999-03-13

Applicant: 한국과학기술연구원

Inventor： 윤경석 ,  조병원 ,  조원일 ,  박달근 ,  이중기 ,  강태혁 ,  주재백

IPC: H01M4/62

Abstract: 본발명은, 카본입자표면에 1∼300 nm의두께로전이금속또는금속산화물층이형성된리튬이차전지용음극활물질과, 전이금속또는금속염화물을알코올류용매에, 바람직하게는 0.1∼2 mol의농도로, 녹여졸 용액을만들고, 상기졸 용액이 pH 1.5 이하의겔 용액이될 때까지교반한후, 카본을상기겔 용액에침적시키고카본과겔 용액이충분히접촉할수 있도록교반을계속하고, 이렇게얻어진겔 용액을여과하여겔 성분을 1∼300 nm의두께로카본입자표면에형성시킨카본을얻고이를열처리하여전이금속또는금속산화물층을 1 ∼ 300 nm의두께로카본입자표면에형성시키는, 바람직하게는산소를함유하는분위기에서 200∼800℃의온도범위에서열처리하는리튬이차전지용음극활물질의제조방법을제공한다.

公开(公告)号：KR1020000060301A

公开(公告)日：2000-10-16

申请号：KR1019990008487

申请日：1999-03-13

Applicant: 한국과학기술연구원

Inventor： 윤경석 ,  조병원 ,  조원일 ,  박달근 ,  이중기 ,  강태혁 ,  주재백

IPC: H01M4/62

Abstract: PURPOSE: A cathode active material for a lithium secondary battery and a manufacturing method thereof are provided to drastically reduce deterioration of an electrode capacity due to battery charge/discharge, to cause a capacity of the electrode active material to be the closest to a theoretical capacity, to realize a superior electrode capacity and cycle property, to improve a high-rate charge/discharge property, and to increase binding power and conductivity with a current collector. CONSTITUTION: A carbon particle have a transition metal or a metal oxide layer of a thickness from 1 to 300 nm on a surface thereof. A method for manufacturing a cathode active material for a lithium secondary battery comprises the following steps. A first step is dissolving the cathode active material, having the transition metal or the metal oxide layer of a thickness from 1 to 300 nm on the surface of the carbon particle, and the transition metal or the metal chloride into an alcoholic solvent. A second step is mixing the gel solution until becoming a gel solution of less than pH 1.5. A third step is filtering the gel solution so as to obtain a carbon having a gel ingredient of a thickness from 1 to 300 nm on a surface thereof, and heating the same so as to form a transition metal or a metal oxide layer having its thickness 1-300 nm on the surface of the carbon particle.

Abstract translation: 目的：提供一种用于锂二次电池的阴极活性材料及其制造方法，以极大地减少电池充电/放电引起的电极容量的劣化，使电极活性物质的容量最接近理论容量 ，以实现优异的电极容量和循环性能，以提高高速率充电/放电性能，并且利用集电体增加粘合力和导电性。 构成：碳颗粒在其表面上具有厚度为1至300nm的过渡金属或金属氧化物层。 一种锂二次电池用正极活性物质的制造方法，其特征在于，具有以下工序。 第一步是将具有1〜300nm的过渡金属或金属氧化物层的正极活性物质溶解在碳粒子的表面上，将过渡金属或金属氯化物溶解成醇溶剂。 第二步是将凝胶溶液混合直至成为小于pH1.5的凝胶溶液。 第三步骤是过滤凝胶溶液，以获得其表面上具有1至300nm厚度的凝胶成分的碳，并加热该碳以形成其厚度的过渡金属或金属氧化物层 在碳颗粒表面上1-300nm。