采用溶剂热反应并经在氮气中煅烧的方法制备出不同形貌的 Fe 3 O 4/ C 纳米复合物。无需表面活性剂或模板剂,仅通过调控反应物的浓度,合成出花状、纳米片状、空心球形结构3种纳米结构,并对不同形貌的形成机理进行探讨。此外,三种不同形貌样品的电化学结果表明,花状样品的电化学综合性能显著优于另外两种形貌,在5 C 的充放电电流下,其可逆比容量能达到227 mAh/ g,而空心球形、纳米片状结构样品的容量则分别为45、10 mAh/ g。
Morphology-controlled Fe3 O4 / carbon nanocomposites were synthesized by a solvothermal reaction followed by calcina-tion under a nitrogen atmosphere. Flower-like structures, dispersed nanoflakes and hollow microspheres could be readily obtained by adjusting the concentrations of the reactants. Based on the time-dependent structure evolution, a possible mechanism for the forma-tion of the different morphologies under various conditions was discussed. The lithium storage properties of the different Fe bon composites were compared. The flower-like sample shows the best electrochemical performance with the highest specific capaci-ty of 227 mAh/ g at a current rate of 5 C while hollow microspheres and dispersed nanoflakes have specific capacities of only 45 and 10 mAh/ g, respectively.
参考文献
| [1] | Poizot P;Laruelle S;Grugeon S et al.Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion bat-teries[J].NATURE,2000,407(6803):496-499. |
| [2] | Mitra S;Poizot P;Finke A;Tarascon JM .Growth and electrochemical characterization versus lithium of Fe3O4 electrodes made via electrodeposition[J].Advanced functional materials,2006(17):2281-2287. |
| [3] | L. Wang;Y. Yu;P.C. Chen;D.W. Zhang;C.H. Chen .Electrospinning Synthesis Of C/fe_3o_4 Composite Nanofibers And Their Application For High Performance Lithium-ion Batteries[J].Journal of Power Sources,2008(2):717-723. |
| [4] | 李建华,洪若瑜,罗国华,郑莹,李洪钟,尉东光.碳纳米管承载纳米Fe3O4颗粒的制备[J].新型炭材料,2010(03):192-198. |
| [5] | Piao, YZ;Kim, HS;Sung, YE;Hyeon, T .Facile scalable synthesis of magnetite nanocrystals embedded in carbon matrix as superior anode materials for lithium-ion batteries[J].Chemical communications,2010(1):118-120. |
| [6] | Guangmin Zhou;Da-Wei Wang;Feng Li .Graphene-Wrapped Fe3O4 Anode Material with Improved Reversible Capacity and Cyclic Stability for Lithium Ion Batteries[J].Chemistry of Materials: A Publication of the American Chemistry Society,2010(18):5306-5313. |
| [7] | Baojun Li;Huaqiang Cao;Jin Shao .Superparamagnetic Fe3O4 nanocrystals@graphene composites for energy storage devices[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2011(13):5069-5075. |
| [8] | Wei-Ming Zhang;Xing-Long Wu;Jin-Song Hu;Yu-Guo Guo;Li-Jun Wan .Carbon Coated Fe_3o_4 Nanospindles As A Superior Anode Material For Lithium-ion Batteries[J].Advanced functional materials,2008(24):3941-3946. |
| [9] | Ting Zhu;Jun Song Chen;Xiong Wen (David) Lou .Glucose-Assisted One-Pot Synthesis of FeOOH Nanorods and Their Transformation to Fe3O4@Carbon Nanorods for Application in Lithium Ion Batteries[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2011(19):9814-9820. |
| [10] | Shuangling Jin;Honggui Deng;Donghui Long;Xiaojun Liu;Liang Zhan;Xiaoyi Liang;Wenming Qiao;Licheng Ling .Facile synthesis of hierarchically structured Fe_3O_4/carbon micro-flowers and their application to lithium-ion battery anodes[J].Journal of Power Sources,2011(8):3887-3893. |
| [11] | King'Ondu, C.K.;Iyer, A.;Njagi, E.C.;Opembe, N.;Genuino, H.;Huang, H.;Ristau, R.A.;Suib, S.L. .Light-assisted synthesis of metal oxide heirarchical structures and their catalytic applications[J].Journal of the American Chemical Society,2011(12):4186-4189. |
| [12] | Wei J J;Yang Z J;Yang Y Z .Fabrication of three dimensional CeO2 hierarchical structures:Precursor template synthesis,for-mation mechanism and properties[J].CRYSTENGCOMM,2011,13(07):2418-2424. |
| [13] | Bin Liu;Hua Chun Zeng .Symmetric and Asymmetric Ostwald Ripening in the Fabrication of Homogeneous Core-Shell Semiconductors[J].Small,2005(5):566-571. |
| [14] | Fu, XB;Feng, JY;Wang, H;Ng, KM .Morphological and structural evolution of alpha-MnO2 nanorods synthesized via an aqueous route through MnO4-/Mn2+ reaction[J].Journal of Solid State Chemistry,2010(4):883-889. |
| [15] | Sun P;Zhao W;Cao Y et al.Porous SnO2 hierarchical nanoshe-ets:hydrothermal preparation,growth mechanism,and gas sensing properties[J].CRYSTENGCOMM,2011,13(11):3718-3724. |
| [16] | Feng J J;Liao Q C;Wang A J et al.Mannite supported hy-drothermal synthesis of hollow flower-like ZnO structures for photocatalytic applications[J].CRYSTENGCOMM,2011,13(12):4202-4210. |
| [17] | Zhou L;Wang W Z;Zhang L S et al.Single-crystalline Bi-VO4 microtubes with square cross-sections:microstructure,growth mechanism,and photocatalytic property[J].J Phys Chem C,2007,111(37):13659-13664. |
| [18] | Qingtao Wang;Xiaobo Wang;Wenjing Lou .Ionothermal synthesis of bismuth sulfide nanostructures and their electrochemical hydrogen storage behavior[J].New Journal of Chemistry,2010(9):1930-1935. |
| [19] | Li BX;Rong GX;Xie Y;Huang LF;Feng CQ .Low-temperature synthesis of alpha-MnO2 hollow urchins and their application in rechargeable Li+ batteries[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2006(16):6404-6410. |
| [20] | Qiao R;Zhang XL;Qiu R;Kim JC;Kang YS .Morphological Transformation of Co(OH)(2) Microspheres from Solid to Flowerlike Hollow Core-Shell Structures[J].Chemistry: A European journal,2009(8):1886-1892. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%