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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Tao H,Zhou M,Wang K,Cheng S,Jiang K

doi

10.1038/srep43895

subject

Has Abstract

pub_date

2017-03-03 00:00:00

pages

43895

issn

2045-2322

pii

srep43895

journal_volume

7

pub_type

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