AUTHOR=Yu Sicen , Wan Yi , Shang Chaoqun , Wang Zhenyu , Zhou Liangjun , Zou Jianli , Cheng Hua , Lu Zhouguang 

TITLE=Ultrafine NaTi2(PO4)3 Nanoparticles Encapsulated in N-CNFs as Ultra-Stable Electrode for Sodium Storage

JOURNAL=Frontiers in Chemistry

VOLUME=6

YEAR=2018

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00270

DOI=10.3389/fchem.2018.00270

ISSN=2296-2646

ABSTRACT=<p>We present a feasible method for the preparation of one-dimensional N-doping carbon nanofibers encapsulated NaTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (NTP-NCNFs) through electrospinning accompanied by calcination. The poor electrical conductivity of NTP is significantly improved and the as-prepared NTP-NCNFs exhibit stable and ultrafast sodium-storage capability. The NTP-NCNFs maintains a stable specific capacity of 121 mAh g<sup>−1</sup> at 10 C after 2,000 cycles, which only drop to 105 mAh g<sup>−1</sup> after 20,000 cycles. Furthermore, the NTP-NCNFs show excellent rate performance from 0.2 to 20 C, whose recovery efficiency still reaches 99.43%. The superior electrochemical property is mainly attributed to the large specific surface area, high porosity, N-doping carbon coating, and one-dimensional structure of NTP-NCNFs.</p>