학회 | 한국재료학회 |
학술대회 | 2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
권호 | 27권 2호 |
발표분야 | G. 나노/박막 재료 분과 |
제목 | Controllable crystal structure and oxygen vacancies of α-MoO3 for enhancing electrochemical properties. |
초록 | The orthorhombic MoO3 (α-MoO3), a layered compound with a superior theoretical capacity for charge storage, has been studied as a cathode material for Lithium-ion batteries. Many strategies, such as forming nanostructure, introducing oxygen vacancies, have been attempted to enhance charge storage properties. Recently, almost MoO3 was synthesized by hydrothermal method. However, this method has a lot of the chance for impurity incorporation due to the solution phase and difficulty of controlling crystal structure and oxygen vacancies. In this study, we successfully fabricated nanostructured MoO3 with oxygen vacancies via an e-beam evaporator and flame method for the first time. Nanostructured MoO3 were firstly deposited by an e-beam evaporator, and then the crystal structure and thickness were grown by controlling substrate temperature and deposition rate. Subsequently, the optimized flame condition, such as flow rate, fuel-to-air equivalence ratio, treatment time, successfully can introduce oxygen vacancies. Therefore, the optimized MoO3 significantly enhanced the electrochemical properties such as Lithium-ion storage and charging/discharging rate. |
저자 | 곽건호, 이민기, 류학기 |
소속 | 아주대 |
키워드 | <P>MoO<SUB>3</SUB>; battery; cathode material; e-beam evaporator; flame method; nanostructure; oxygen vacancy</P> |