Xu Binghui, Yu Longbiao, Zhao Xu, Wang Haoran, Wang Chao, Zhang Lian Ying, Wu Guanglei
Institute of Materials for Energy and Environment, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
Institute of Materials for Energy and Environment, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
J Colloid Interface Sci. 2021 Feb 15;584:827-837. doi: 10.1016/j.jcis.2020.10.013. Epub 2020 Oct 12.
In this work, a simple and effective method is developed to synthesize zinc ferrite nanoparticles (ZnFeO) in a redox coprecipitation reaction system containing only ferrous and zinc salt followed by a solid-state reaction. On this foundation, ZnFeO nanoparticles with reduced size are further immobilized by reduced graphene oxide (RGO) to engineer a ZnFeO/RGO composite by simply introducing graphene oxide (GO) in the above reaction system. The ZnFeO/RGO composite electrode exhibits attractive lithium-ion storage capability with a reversible capacity of about 760 mAh·g for 200 charge/discharge cycles and 603 mAh·g for 700 cycles under a current rate of 1.0 A·g. The robust and porous RGO supporting framework, well immobilized ZnFeO nanoparticles with controlled size and pseudocapacitive behavior of the composite jointly ensure the good battery performance. Moreover, the synthetic route for ZnFeO nanoparticles and ZnFeO/RGO composite is simple and economic, which may be further developed for massive production and applied in other fields.
在本工作中，开发了一种简单有效的方法，在仅含亚铁盐和锌盐的氧化还原共沉淀反应体系中合成铁酸锌纳米颗粒（ZnFeO），随后进行固态反应。在此基础上，通过在上述反应体系中简单引入氧化石墨烯（GO），用还原氧化石墨烯（RGO）进一步固定尺寸减小的ZnFeO纳米颗粒，以制备ZnFeO/RGO复合材料。ZnFeO/RGO复合电极表现出有吸引力的锂离子存储能力，在1.0 A·g的电流速率下，200次充/放电循环的可逆容量约为760 mAh·g，700次循环的可逆容量为603 mAh·g。坚固且多孔的RGO支撑框架、尺寸可控且固定良好的ZnFeO纳米颗粒以及复合材料的赝电容行为共同确保了良好的电池性能。此外，ZnFeO纳米颗粒和ZnFeO/RGO复合材料的合成路线简单且经济，有望进一步开发用于大规模生产并应用于其他领域。
