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Glycol Derived Carbon- TiO2 as Low Cost and High Performance Anode Material for Sodium-Ion Batteries.

ABSTRACT: Carbon coated TiO2 (TiO2@C) is fabricated by a convenient and green one-pot solvothermal method, in which ethylene glycol serve as both the reaction medium and carbon source without the addition of any other carbon additives. During the solvothermal process, ethylene glycol polymerize and coordinate with Ti4+ to form the polymeric ligand precursor, then the polymer brushes carbonize and convert to homogeneous carbon layer firmly anchored on the TiO2 nanoparticles (~1?nm thickness). The polymerization and carbonization process of the ethylene glycol is confirmed by FT-IR, Raman, TG and TEM characterizations. Benefiting from the well-dispersed nanoparticles and uniform carbon coating, the as-prepared TiO2@C demonstrate a high reversible capacity of 317?mAh g-1 (94.6% of theoretical value), remarkable rate capability of 125?mAh g-1 at 3.2?A g-1 and superior cycling stability over 500 cycles, possibly being one of the highest capacities reported for TiO2.

SUBMITTER: Tao H 

PROVIDER: S-EPMC5335553 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature

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Glycol Derived Carbon- TiO<sub>2</sub> as Low Cost and High Performance Anode Material for Sodium-Ion Batteries.

Tao Hongwei H   Zhou Min M   Wang Kangli K   Cheng Shijie S   Jiang Kai K  

Scientific reports 20170303

Carbon coated TiO<sub>2</sub> (TiO<sub>2</sub>@C) is fabricated by a convenient and green one-pot solvothermal method, in which ethylene glycol serve as both the reaction medium and carbon source without the addition of any other carbon additives. During the solvothermal process, ethylene glycol polymerize and coordinate with Ti<sup>4+</sup> to form the polymeric ligand precursor, then the polymer brushes carbonize and convert to homogeneous carbon layer firmly anchored on the TiO<sub>2</sub> na  ...[more]

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