title: Synthesis of NASICON-type structured NaTi2(PO4)3-graphene nanocomposite as an anode for aqueous rechargeable Na-ion batteries.
abstract: A new solvothermal strategy combined with calcination has been developed to synthesize NaTi2(PO4)3-graphene nanocomposites. X-ray diffraction, thermogravimetric analysis, field-emission scanning electron microscopy and transmission electron microscopy were performed to characterize their microstructures and morphologies. It was found that NASICON-type structured NaTi2(PO4)3 nanoparticles with highly crystallinity were homogeneously anchored on the surface of conducting graphene nanosheets, forming a two-dimensional hybrid nanoarchitecture. A possible growth mechanism was also discussed based on time-dependent experiments. When used as anode materials for Na-ion batteries, the nanocomposites exhibited excellent electrochemical performance with high-rate capability and excellent cycling stability in 1 M Na2SO4 aqueous electrolyte. The electrode delivered high specific capacities of 110, 85, 65, 40 mA h g(-1) at 2, 5, 10 and 20 C, respectively, and still retained 90% of the initial capacity after 100 cycles at 2 C.
authors.affiliation: College of Material Science & Engineering and Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China. azhangxg@163.com.
authors.forename: Gang
authors.initials: G
authors.lastname: Pang
authors.forename: Changzhou
authors.initials: C
authors.lastname: Yuan
authors.forename: Ping
authors.initials: P
authors.lastname: Nie
authors.forename: Bing
authors.initials: B
authors.lastname: Ding
authors.forename: Jiajia
authors.initials: J
authors.lastname: Zhu
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Zhang