Jin Yunxia, Wang Shimin, Li Jia, Qu Sheng, Yang Liufang, Guo Junming
School of Electrical and Information Technology, Yunnan Minzu University Kunming 650500 China
School of Chemistry and Environment, Yunnan Minzu University Kunming 650500 China
RSC Adv. 2020 Jun 15;10(38):22848-22855. doi: 10.1039/d0ra02497j. eCollection 2020 Jun 10.
Due to the limited utilization of electrode materials, the rational design and facile synthesis of composite structures are still challenging issues for lithium-ion batteries (LIBs). Herein, a simple approach has been developed to prepare multiple core-shell structures of ZnO nanoparticles (NPs) encapsulated in hollow amorphous carbon (AC) shells. The as-synthesized ZnO@AC composites showed a uniform dispersion of ZnO NPs, compliant buffer AC shells, and nanoscale void spaces between the ZnO NP cores and AC shells. As a result of their structural merits, the ZnO@AC composites were evaluated as anode materials for LIBs and delivered enhanced coulombic efficiency, high reversible capacity, high rate capability, and improved cycling stability.
由于电极材料的利用率有限，复合结构的合理设计和简便合成对于锂离子电池（LIBs）而言仍然是具有挑战性的问题。在此，已开发出一种简单的方法来制备包裹在中空非晶碳（AC）壳中的ZnO纳米颗粒（NPs）的多核壳结构。所合成的ZnO@AC复合材料显示出ZnO NPs的均匀分散、柔顺的缓冲AC壳以及ZnO NP核与AC壳之间的纳米级空隙。由于其结构优点，ZnO@AC复合材料被评估为LIBs的负极材料，并表现出提高的库仑效率、高可逆容量、高倍率性能和改善的循环稳定性。
