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Facile synthesis of titanium nitride-graphene nanocomposite and its improved rate-dependent electroactivity with respect to lithium storage

Yousefi, E ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.materresbull.2016.08.040
  3. Publisher: Elsevier Ltd
  4. Abstract:
  5. Titanium nitride/graphene nanocomposite as an anode material of lithium ion batteries has been fabricated through the reaction of TiCl4 and NaN3 in supercritical benzene medium followed by ammonia treating at 1000 °C for 10 h. The synthesized TiN/G nanocomposite depicts rate-dependent behavior in such a way that it shows specific capacity of 115 mAh g−1 when is cycled at higher rate (1.6 C) while it shows 76 mAh g−1 when is cycled initially at lower rate (0.2 C) and is subsequently subjected to higher rate (1.6 C). Moreover, TiN/G anode demonstrates capacity retention of 112%, 100%, and 70% after 250 cycles at charge/discharge rates of 1.6, 0.7, and 0.2 C, respectively. This unusual behavior can be due to (i) an affected lithiation/delithiation mechanism and consequently stabilized carbon layered structure, and (ii) less solid electrolyte interface formation. Furthermore, the possible mechanisms of this rate-dependent behavior of TiN/G anode are discussed
  6. Keywords:
  7. A. Composites ; A. Nitrides ; B. Phase transitions ; D. Electrochemical properties ; D. Energy storage ; Anodes ; Carbon ; Electrodes ; Lithium alloys ; Lithium compounds ; Lithium-ion batteries ; Nanocomposites ; Nitrides ; Solid electrolytes ; Titanium ; Titanium compounds ; Anode material of lithium ion batteries ; Graphene nanocomposites ; Layered Structures ; Lithiation/delithiation ; Possible mechanisms ; Rate-dependent behaviors ; Solid electrolyte interfaces ; Specific capacities ; Titanium nitride
  8. Source: Materials Research Bulletin ; Volume 84 , 2016 , Pages 388-396 ; 00255408 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0025540816307061