CAJ | 학술논문

采用微乳-溶剂热法制备了空心球状Fe3 O4纳米晶。利用 X 射线衍射( XRD)和扫描电子显微镜( SEM)对所制备的样品进行晶型结构表征和形貌观察。制备的Fe3 O4颗粒为粒径550 nm的空心球状。对以纳米Fe3 O4空心球为电催化剂的锂-空气电池进行恒流充放电和交流阻抗测试。在50 mA·g-1的电流密度下,电池的首次放电容量高达1602 mAh·g-1,放电电压平台为2.8~2.2 V,充电电压平台为3.8 V左右。
채용미유-용제열법제비료공심구상Fe3 O4납미정。이용 X 사선연사( XRD)화소묘전자현미경( SEM)대소제비적양품진행정형결구표정화형모관찰。제비적Fe3 O4과립위립경550 nm적공심구상。대이납미Fe3 O4공심구위전최화제적리-공기전지진행항류충방전화교류조항측시。재50 mA·g-1적전류밀도하,전지적수차방전용량고체1602 mAh·g-1,방전전압평태위2.8~2.2 V,충전전압평태위3.8 V좌우。
Fe3 O4 hollow spheres with a diameter of 550 nm were successfully synthesized via a microemulsion-mediated solvothermal method and used as an electrode catalyst for lithium-air battery. The structure and morphology were characterized by X-ray diffraction ( XRD ) and scanning electron microscopy ( SEM ) . The electrocatalytic properties of the prepared Fe3 O4 hollow spheres were further evaluated by galvanostatic charge/discharge cycling and electrochemical impedance spectrometry ( EIS ) . The lithium-air battery based on Fe3 O4 hollow spheres exhibited a high discharge capacity of 1602 mAh·g-1 in ambient air at a voltage of 2. 0 ~4. 1 V at 50 mA·g-1. The discharge voltage platform stabilized around 2. 8~2. 2 V and charge voltage platform was 3. 8 V.