Ma Tao, Su Ting-Yu, Zhang Long, Yang Ji-Wen, Yao Hong-Bin, Lu Lei-Lei, Liu Yi-Fei, He Chuanxin, Yu Shu-Hong
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China.
Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, University of Science and Technology of China, Hefei 230026, China.
Nano Lett. 2021 Mar 24;21(6):2347-2355. doi: 10.1021/acs.nanolett.0c04033. Epub 2021 Mar 11.
Graphene-based one-dimensional macroscopic assemblies (GBOMAs) have attracted great attention and extensive efforts have been devoted to enabling great progress. However, their applications are still restricted to less functionalized electronics, and the superior potentials remain scarce. Herein, inspired by natural scallion structure, a novel strategy was introduced to effectively improve battery performances through the mesoscale scallion-like wrapping of graphene. The obtained RGO/Ag-Li anodes demonstrated an ultralow overpotential of ∼11.3 mV for 1800 h at 1 mA cm in carbonate electrolytes, which is superior to those of the most previous reports. Besides, this strategy can also be further expanded to the high mass loading of various cathode nanomaterials, and the resulting RGO/LiFePO cathodes exhibited remarkable rate performance and cycle stability. This work opens a new avenue to explore and broaden the applications of GBOMAs as scaffolds in fabricating full lithium batteries via maximizing their advantages derived from the unique structure and properties.
基于石墨烯的一维宏观组装体（GBOMAs）已引起了极大关注，人们也付出了大量努力以取得重大进展。然而，它们的应用仍局限于功能较少的电子器件，其卓越潜力仍很稀缺。在此，受天然葱结构的启发，引入了一种新策略，通过石墨烯的中尺度葱状包裹来有效提高电池性能。所制备的RGO/Ag-Li阳极在碳酸盐电解质中，于1 mA cm下1800 h表现出约11.3 mV的超低过电位，这优于此前的大多数报道。此外，该策略还可进一步扩展到各种阴极纳米材料的高质量负载，所得的RGO/LiFePO阴极展现出卓越的倍率性能和循环稳定性。这项工作开辟了一条新途径，通过最大化GBOMAs源自独特结构和性能的优势，来探索和拓宽其作为支架在制造全锂电池中的应用。
