| 학회 | 한국재료학회 |
| 학술대회 | 2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 | 23권 1호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | LiNi0.8Co0.1Mn0.1O2 Cathode Materials with High Physicochemical Stability by addition of Binding Oxides |
| 초록 | In lithium nickel cobalt manganese trivalent oxide (NCM) for high capacity lithium ion battery cathode, high nickel content NCM material can remarkably reduce the amount of Co needed, thus it can reduce the total cost of the material since Co is an expensive element. In addition, the reversible capacity was improved by about 15 ~ 20% compared to LiCoO2 or low Ni content NCM material. Currently, the co-precipitation method is adopted in the synthesis of NCM due to it easiness in the control of the physical/chemical properties thereby preventing the impurity phase of the final product. However, in the case of the high-content nickel cathode material, the secondary particle intergranular fracture of aggregation occurs during the charging/discharging process, resulting in mechanical deterioration of the material. This in effect decreases the capacity due to an increase in mass transfer resistance of the battery. To solve this problem, the metal hydroxide is synthesized by co-precipitation with the addition of oxide materials, which acts as a binding agent in the primary particle phase. The addition of the binding oxides improves the physical and chemical bonding of LiNi0.8Co0.1Mn0.1O2 particles through the control at the precursor stage and aims at securing the stability of the structure. SEM and XRD analyzes were performed to confirm the shape, size and crystallinity of the powders. EDS and ICP analyzes were carried out to quantitatively analyze the location and metal composition ratio of the binder materials to lithium ions in the material. The electrochemical properties were evaluated. |
| 저자 | Beomhee Kang1, Yehyun Koo2, Soonhyun Hong1, Chunjoong Kim2 |
| 소속 | 1Department of Materials Science and Engineering, 2Chungnam National Univ. |
| 키워드 | Lithium Nickel Cobalt Manganese Oxide; Aggregate; Binding Oxides |
