Jang Jihyun, Kim Tae Hun, Ryu Ji Heon
Department of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
Department of Chemical Engineering and Biotechnology, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, Gyeonggi-do, 15073, Republic of Korea.
Sci Rep. 2021 Jun 22;11(1):13095. doi: 10.1038/s41598-021-92550-z.
As the application of lithium-ion batteries in electric vehicles increases, the demand for improved charging characteristics of batteries is also increasing. Lithium titanium oxide (LiTiO, LTO) is a negative electrode material with high rate characteristics, but further improvement in rate characteristics is needed for achieving the quick-charging performance required by electric vehicle markets. In this study, the surface of LTO was coated with a titanium nitride (TiN) layer using urea and an autogenic reactor, and electrochemical performance was improved (initial Coulombic efficiency and the rate capability were improved from 95.6 to 4.4% for pristine LTO to 98.5% and 53.3% for urea-assisted TiN-coated LTO, respectively. We developed a process for commercial production of surface coatings using eco-friendly material to further enhance the charging performance of LTO owing to high electronic conductivity of TiN.
随着锂离子电池在电动汽车中的应用不断增加，对电池充电特性改进的需求也在上升。锂钛氧化物（LiTiO，LTO）是一种具有高倍率特性的负极材料，但为了实现电动汽车市场所需的快速充电性能，仍需要进一步提高倍率特性。在本研究中，使用尿素和自热反应器在LTO表面涂覆了一层氮化钛（TiN），电化学性能得到了改善（原始LTO的初始库仑效率和倍率性能分别从95.6%和4.4%提高到尿素辅助TiN涂覆LTO的98.5%和53.3%）。我们开发了一种使用环保材料进行表面涂层商业化生产的工艺，由于TiN具有高电子导电性，可进一步提高LTO的充电性能。
