Viet Thieu Quang Quoc, Thy Tran Thi Hoang, Ngo Hai Dang, Pham Liem Thanh, Van Tran Man, Tran Ngoc Quang, Thien Le Nguyen Phuc, Nguyen Dinh Quan, Nguyen Tuan Loi, Kim Il Tae
Composite Materials Lab, College of Engineering, Can Tho University, Viet Nam.
Faculty of Chemical Engineering, College of Engineering, Can Tho University, Campus II, 3/2 Street, Ninh Kieu District, Can Tho City, Viet Nam.
Heliyon. 2024 Dec 9;10(24):e41089. doi: 10.1016/j.heliyon.2024.e41089. eCollection 2024 Dec 30.
In this study, shell-derived cellulose was successfully produced, and the hydrothermal method was employed to generate ZnO@C (ZOC) composites, which were then subjected to calcination in N gas at a temperature of 600 °C for varying durations. X-ray diffraction and thermogravimetric analyses demonstrated that the annealing duration had a substantial impact on the quantities of C and ZnO in the ZOC composites. The scanning electron microscope images indicated the presence of ZnO nanoparticles on the surface of the C phase and revealed a similar morphology among the ZOC composites. ZOC anodes exhibited excellent electrochemical properties when used in lithium-ion batteries (LIBs), making them promising alternatives to graphite as LIB anode materials. As an illustration, the ZOC_2h electrode delivered a reversible capacity of 500 mAh g after 100 cycles at a current density of 0.1 A g. The excellent electrochemical performance of the ZOC electrodes may be attributed to the carbon matrix obtained from cellulose, the appropriate quantity of C and ZnO phases in the ZOC composites, and their distinctive structure.
在本研究中，成功制备了壳聚糖衍生的纤维素，并采用水热法制备了ZnO@C（ZOC）复合材料，然后将其在氮气中于600℃下煅烧不同时间。X射线衍射和热重分析表明，退火时间对ZOC复合材料中C和ZnO的含量有显著影响。扫描电子显微镜图像显示在C相表面存在ZnO纳米颗粒，并揭示了ZOC复合材料之间相似的形态。ZOC阳极在锂离子电池（LIB）中使用时表现出优异的电化学性能，使其成为作为LIB阳极材料替代石墨的有前途的选择。例如，ZOC_2h电极在0.1 A g的电流密度下循环100次后，可逆容量为500 mAh g。ZOC电极优异的电化学性能可能归因于从纤维素获得的碳基体、ZOC复合材料中适量的C和ZnO相以及它们独特的结构。
