Li Zhengang, Wang Shih-Hao, Cui Jieshun, Wang Yu, Zhang Junxian, Xu Ping, Zhou Ming, Wang Leeyih, Wang Hsing-Lin
Department of Materials Science and Engineering , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China.
Institute of Polymer Science and Engineering , National Taiwan University , 10617 Taipei , Taiwan.
ACS Nano. 2020 Feb 25;14(2):1600-1608. doi: 10.1021/acsnano.9b06791. Epub 2020 Jan 27.
Organic carbon materials, such as graphene and nanotubes, with a high specific capacity show promise in improving the energy density for lithium ion batteries (LiBs). Here, we report on the synthesis and characterization of C(OH) and the C(OH)/graphene oxide (GO) composite and demonstrate their use as anode materials in LiBs. We find that the C(OH)/GO composite forms due to the chemical reactions between the carboxyl and epoxy groups of GO and the hydroxyl of C(OH) nanoparticles and that C(OH) uniformly grows on the surface of GO nanosheets. Using a suite of spectroscopy probes, we unequivocally show the mixing between C(OH) and GO at the molecular level, which leads to superior battery performances. This composite has a reversible capacity of 1596 mAh g at 0.2 A g, higher than the capacities of C(OH) and GO. This composite has a superior cycling stability and excellent rate performance, making it a promising organic anode material for high-performance LiBs.
诸如石墨烯和纳米管之类的具有高比容量的有机碳材料在提高锂离子电池（LiBs）的能量密度方面显示出前景。在此，我们报告了C(OH)及C(OH)/氧化石墨烯（GO）复合材料的合成与表征，并展示了它们作为LiBs阳极材料的用途。我们发现C(OH)/GO复合材料是由于GO的羧基和环氧基与C(OH)纳米颗粒的羟基之间的化学反应而形成的，并且C(OH)均匀地生长在GO纳米片的表面上。使用一系列光谱探针，我们明确地展示了C(OH)和GO在分子水平上的混合，这导致了优异的电池性能。这种复合材料在0.2 A g下的可逆容量为1596 mAh g，高于C(OH)和GO的容量。这种复合材料具有优异的循环稳定性和出色的倍率性能，使其成为高性能LiBs的一种有前景的有机阳极材料。
