title: Solvothermal-induced self-assembly of Fe2O3/GS aerogels for high Li-storage and excellent stability.
abstract: A novel solvothermal-induced self-assembly approach, using colloid sol as precursor, is developed to construct monolithic 3D metal oxide/GS (graphene sheets) aerogels. During the solvothermal process, graphene oxide (GO) is highly reduced to GS and self-assembles into 3D macroscopic hydrogels, accompanying with in situ transformation of colloid sol to metal oxides. As a proof of concept, Fe2 O3 /GS aerogels are synthesized based on Fe(OH)3 sol, in which GS self-assemble into an interconnected macroporous framework and Fe2 O3 nanocrystals (20-50 nm) uniformly deposit on GS. Benefitting from the integration of macroporous structures, large surface area, high electrical conductivity, and good electrode homogeneity, the hybrid electrode manifests a superior rate capability (930, 660 and 520 mAh g(-1) at 500, 2000 and 4000 mA g(-1), respectively) and excellent prolonged cycling stability at high rates (733 mAh g(-1) during 1000 charge/discharge cycles at 2000 mA g(-1)), demonstrating its great potential for application in high performance lithium ion batteries. The work described here provides a versatile pathway to construct various graphene-based hybrid aerogels.
authors.affiliation: The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
authors.forename: Ronghua
authors.initials: R
authors.lastname: Wang
authors.forename: Chaohe
authors.initials: C
authors.lastname: Xu
authors.forename: Meng
authors.initials: M
authors.lastname: Du
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
authors.forename: Lian
authors.initials: L
authors.lastname: Gao
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Heliang
authors.initials: H
authors.lastname: Yao
authors.forename: Chucheng
authors.initials: C
authors.lastname: Lin
keywords: colloidal; graphene; hydrogel; lithium ion batteries; solvothermal