title: Highly Reversible and Ultrafast Sodium Storage in NaTi2(PO4)3 Nanoparticles Embedded in Nanocarbon Networks.
abstract: Sodium ion batteries (NIBs) have been considered as an alternative for Li ion batteries (LIBs). NaTi2(PO4)3 (denoted as NTP) is a superior anode material for NIBs. However, the poor electrochemical performance of NTP resulting from the low electronic conductivity prevents its application. Here, NTP nanoparticles embedded in carbon network (denoted as NTP/C) were fabricated using a simple soft-template method. This anode material exhibits superior electrochemical performance when used as anode electrodes for NIBs, including highly reversible capacity (108 mAh g(-1) at 100 C) for excellent rate performance and long cycle life (83 mAh g(-1) at 50 C after 6000 cycles). The excellent sodium storage property can be resulted from the synergistic effects of nanosized NTP, thinner carbon shell and the interconnected carbon network, leading to the low charge transfer resistance, the large surface area for electrolyte to soak in and enough void to buffer the volume variation during the repeated cycle.
authors.affiliation: Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Beijing Laboratory for Electron Microscopy, Institute of Physics, Chinese Academy of Sciences (CAS) , Beijing, 100190, China.
authors.forename: Jinan
authors.initials: J
authors.lastname: Shi
authors.affiliation: Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.affiliation: Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Linchao
authors.initials: L
authors.lastname: Zeng
authors.affiliation: Beijing Laboratory for Electron Microscopy, Institute of Physics, Chinese Academy of Sciences (CAS) , Beijing, 100190, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.affiliation: Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.|State Key Laboratory of Fire Science, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
keywords: NaTi2(PO4)3; carbon network; sodium ion batteries; soft-template method; superior rate capability