Toward rational design of N-doped Li4Ti5O12@carbon anode materials for high-performance lithium-ion batteries
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The construction of efficient nitrogen doping and carbon coating Li4Ti5O12 anode materials is of critical importance for high-performance lithium-ion batteries. Herein, nitrogen-doped Li4Ti5O12@carbon nanoparticles have been synthesized via a one-step straight-forward strategy under solid-state conditions using chitosan as novel nitrogen/carbon source. The process with introducing chitosan incorporates that nitrogen-doped into both Li4Ti5O12 lattice and carbon could enlarge both the lattice volume of Li4Ti5O12 and the content of disordered carbon, which give rise to shortened path of Li+ ions intercalation and enhanced bulk Li4Ti5O12 electronic conductivity. Meanwhile, the introduction of chitosan could inhibit the agglomeration of nanoparticles and amplify the specific surface area so as to transfer Li+ ions faster, especially at high current density. As a result, the reversible discharge capacity of nitrogen-doped Li4Ti5O12@carbon electrode is up to 121.8 mAh g−1 and still remains at 117.1 mAh g−1 after 500 cycles at a current density of 10 C. Therefore, nitrogen-doped Li4Ti5O12@carbon nanoparticles electrode could be a potential candidate as an anode material for lithium-ion batteries.
KeywordsLi4Ti5O12 Chitosan Nitrogen doping Carbon coating Lithium-ion batteries
This work was supported by Shandong Provincial Natural Science Foundation (Grant No. ZR2016BM22) and the Science and Technology Development Plan Project of Shandong Province (Grant No. 2014GGX102039).
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Conflict of interest
The authors declare that they have no conflict of interest.
- 14.Lai F, Miao YE, Zuo L, Lu H, Huang Y, Liu T (2016) Biomass-derived nitrogen-doped carbon nanofiber network: a facile template for decoration of ultrathin nickel-cobalt layered double hydroxide nanosheets as high-performance asymmetric supercapacitor electrode. Small 12:3235–3244CrossRefGoogle Scholar
- 20.Chung EH, Han HJ, Khan FN, Hong TE, Kim HG, Bae J, Jung O, Jung H, Kim JP, Jin JS, Jeong ED (2013) Structural and electrochemical properties of carbon-coated Li4Ti5O12 anodic material obtained using chitosan for potential lithium ion rechargeable battery applications. J Ceram Process Res 14:304–310Google Scholar
- 22.Kotnana G, Jammalamadaka SN (2015) General structure analysis system (GSAS). J Appl Phys 117:562Google Scholar
- 30.Wang X, Chen WX, Zhang L, Yao T, Liu W, Ju HX, Dong JC, Zheng LR, Yan WS, Zheng XS, Li ZJ, Wang XQ, Yang J, He DS, Wang Y, Deng ZX, Wu YE, Li YD (2017) Uncoordinated amine groups of metal–organic frameworks to anchor single Ru sites as chemoselective catalysts toward the hydrogenation of quinoline. J Am Chem Soc 139:9419–9422CrossRefGoogle Scholar