title: NASICON-Structured NaTi2(PO4)3@C Nanocomposite as the Low Operation-Voltage Anode Material for High-Performance Sodium-Ion Batteries.
abstract: NASICON-type structured NaTi2(PO4)3 (NTP) has attracted wide attention as a promising anode material for sodium-ion batteries (SIBs), whereas it still suffer from poor rate capability and cycle stability due to the low electronic conductivity. Herein, the architecture, NTP nanoparticles embedded in the mesoporous carbon matrix, is designed and realized by a facile sol-gel method. Different than the commonly employed potentials of 1.5-3.0 V, the Na(+) storage performance is examined at low operation voltages between 0.01 and 3.0 V. The electrode demonstrates an improved capacity of 208 mAh g(-1), one of the highest capacities in the state-of-the-art titanium-based anode materials. Besides the high working plateau at 2.1 V, another one is observed at approximately 0.4 V for the first time due to further reduction of Ti(3+) to Ti(2+). Remarkably, the anode exhibits superior rate capability, whose capacity and corresponding capacity retention reach 56 mAh g(-1) and 68%, respectively, over 10000 cycles under the high current density of 20 C rate (4 A g(-1)). Worthy of note is that the electrode shows negligible capacity loss as the current densities increase from 50 to 100 C, which enables NTP@C nanocomposite as the prospective anode of SIBs with ultrahigh power density.
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Dongxue
authors.initials: D
authors.lastname: Wang
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology , Wuhan 430074, P. R. China.
authors.forename: Chaoji
authors.initials: C
authors.lastname: Chen
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Malin
authors.initials: M
authors.lastname: Li
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Xing
authors.initials: X
authors.lastname: Meng
authors.affiliation: Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University , Kyoto 615-8520, Japan.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Bie
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yingjin
authors.initials: Y
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology , Wuhan 430074, P. R. China.
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Fei
authors.initials: F
authors.lastname: Du
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.|State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, P. R. China.
authors.forename: Chunzhong
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.|State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, P. R. China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
keywords: NaTi2(PO4)3 nanoparticle; electrochemical property; low operation voltage; sodium-ion battery; ultralong cycle life