Lee Wee Siang Vincent, Peng Erwin, Loh Tamie Ai Jia, Huang Xiaolei, Xue Jun Min
Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore.
Nanoscale. 2016 Apr 21;8(15):8042-7. doi: 10.1039/c6nr00340k.
To reduce the reliance on polymeric binders, conductive additives, and metallic current collectors during the electrode preparation process, as well as to assess the true performance of lithium ion battery (LIB) anodes, a free-standing electrode has to be meticulously designed. Graphene aerogel is a popular scaffolding material that has been widely used with embedded nanoparticles for application in LIB anodes. However, the current graphene aerogel/nanoparticle composite systems still involve decomposition into powder and the addition of additives during electrode preparation because of the thick aerogel structure. To further enhance the capacity of the system, MoS2 was anchored onto a graphene aerogel paper and the composite was used directly as an LIB anode. The resultant additive-free MoS2/graphene aerogel paper composite exhibited long cyclic performance with 101.1% retention after 700 cycles, which demonstrates the importance of free-standing electrodes in enhancing cyclic stability.
为了在电极制备过程中减少对聚合物粘合剂、导电添加剂和金属集流体的依赖，并评估锂离子电池（LIB）阳极的真实性能，必须精心设计一种独立式电极。石墨烯气凝胶是一种广受欢迎的支架材料，已广泛用于与嵌入的纳米颗粒一起应用于LIB阳极。然而，由于气凝胶结构较厚，目前的石墨烯气凝胶/纳米颗粒复合体系在电极制备过程中仍会分解成粉末并添加添加剂。为了进一步提高该体系的容量，将二硫化钼锚定在石墨烯气凝胶纸上，并将该复合材料直接用作LIB阳极。所得的无添加剂二硫化钼/石墨烯气凝胶纸复合材料表现出长循环性能，在700次循环后保留率为101.1%，这证明了独立式电极在提高循环稳定性方面的重要性。
