结合磷酸铁锂纳米化,并利用碳纳米管良好的导电性和大长径比等优良特性,采用喷雾干燥方法制备出碳纳米管原位复合磷酸铁锂正极材料。碳纳米管在材料合成过程中均匀分散在活性物质中,形成连续贯通的三维导电网络,这种结构可显著提高磷酸铁锂正极材料的电子导电性和锂离子的扩散速率。所得材料具有良好的大电流放电特性,在50 C 充放电时,比容量达到99 mAh/ g；同时该材料也具有优异的循环性能,在10 C 大电流充放电的情况下,450次循环后容量保持率仍大于90%。
A hybrid cathode material for high rate lithium ion batteries was prepared by ball-milling and spray-drying a slurry con-taining LiFePO 4 nanoparticles, glucose and carbon nanotubes (CNTs) in water, followed by pyrolysis at 600 ℃ for 6 h under a gas mixture of 5% H2 in Ar. CNTs with a large aspect ratio form a continuous conductive network connecting the LiFePO4 nanoparticles and amorphous carbon, which significantly reduces the electrical resistance of the cathode. The hybrid material can deliver a specific capacity of 99 mAh/ g at a 50 C charge/ discharge rate. An excellent cycling performance was also demonstrated, with a capacity loss of less than 10% after 450 cycles at a 10 C rate.
参考文献
| [1] | G. Arnold;J. Garche;R. Hemmer;S. Stroebele;C. Vogler;M. Wohlfahrt-Mehrens .Fine-particle lithium iron phosphate LiFePO_4 synthesized by a new low-cost aqueous precipitation technique[J].Journal of Power Sources,2003(119/121):247-251. |
| [2] | Delacourt C;Poizot P;Levasseur S et al.Size effects on car-bon-free LiFePO4 powders[J].Electrochemical and Solid State Letters,2006,9(07):A352-A355. |
| [3] | PIERRE GIBOT;MONTSE CASAS-CABANAS;LYDIA LAFFONT .Room-temperature single-phase Li insertion/extraction in nanoscale Li_xFePO4[J].Nature materials,2008(9):741-747. |
| [4] | D.-H. Kim;J. Kim .Synthesis of LiFePO_4 Nanoparticles in Polyol Medium and Their Electrochemical Properties[J].Electrochemical and solid-state letters,2006(9):A439-A442. |
| [5] | Jae-Kwang Kim;Jae-Won Choi;Gouri Cheruvally .A modified mechanical activation synthesis for carbon-coated LiFePO_4 cathode in lithium batteries[J].Materials Letters,2007(18):3822-3825. |
| [6] | Kuppan Saravanan;M. V. Reddy;Palani Balaya .Storage performance of LiFePO4 nanoplates[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2009(5):605-610. |
| [7] | Belharouak I;Johnson C;Amine K .Synthesis and electrochemical analysis of vapor-deposited carbon-coated LiFePO4[J].Electrochemistry communications,2005(10):983-988. |
| [8] | Reginald E. Rogers;Garry M. Clarke;Olivia N. Matthew;Matthew J. Ganter;Roberta A. DiLeo;Jason W. Staub;Michael W. Forney;Brian J. Landi .Impact of microwave synthesis conditions on the rechargeable capacity of LiCoPO_4 for lithium ion batteries[J].Journal of Applied Electrochemistry,2013(3):271-278. |
| [9] | Muxina Konarova;Izumi Taniguchi .Preparation of carbon coated LiFePO4 by a combination of spray pyrolysis with planetary ball-milling followed by heat treatment and their electrochemical properties[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2009(1/2):111-116. |
| [10] | Cheng-Zhang Lu;George Ting-Kuo Fey;Hsien-Ming Kao .Study of LiFePO_4 cathode materials coated with high surface area carbon[J].Journal of Power Sources,2009(1):155-162. |
| [11] | Shin H C;Cho W I;Jang H .Electrochemical properties of car-bon-coated LiFePO4 cathode using graphite,carbon black,and acetylene black[J].Electrochimica Acta,2006,52(04):1472-1476. |
| [12] | Zaghib K;Mauger A;Gendron F;Julien CM .Surface effects on the physical and electrochemical properties of thin LiFePO4 particles[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(2):462-469. |
| [13] | Chung S Y;Bloking J T;Chiang Y M .Electronically conduc-tive phospho-olivines as lithium storage electrodes[J].Nat Ma-ter,2002,1(02):123-128. |
| [14] | M.Saiful Islam;Daniel J.Driscoll;Craig A.J.Fisher;Peter R.Slater .Atomic-Scale Investigation of Defects,Dopants,and Lithium Transport in the LiFePO4 Olivine-Type Battery Material[J].Chemistry of Materials,2005(20):5085-5092. |
| [15] | P. Subramanya Herle;B. Ellis;N. Coombs;L. F. Nazar .Nano-network electronic conduction in iron and nickel olivine phosphates[J].Nature materials,2004(3):147-152. |
| [16] | Chang Liu;Feng Li;Lai-Peng Ma;Hui-Ming Cheng .Advanced Materials for Energy Storage[J].Advanced Materials,2010(8):E28-E62. |
| [17] | Sunhye Lim;Chong S. Yoon;Jaephil Cho .Synthesis of Nanowire and Hollow LiFePO4 Cathodes for High-Performance Lithium Batteries[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(14):4560-4564. |
| [18] | Charles R. Sides;Fausto Croce;Vaneica Y. Young .A High-Rate, Nanocomposite LiFePO_4/Carbon Cathode[J].Electrochemical and solid-state letters,2005(9):A484-A487. |
| [19] | J. Yang;J.J. Xu .Nonaqueous Sol-Gel Synthesis of High-Performance LiFePO_4[J].Electrochemical and solid-state letters,2004(12):A515-A518. |
| [20] | Sylvain Franger;Frederic Le Cras;Carole Bourbon;Helene Rouault .Comparison between different LiFePO_4 synthesis routes and their influence on its physico-chemical properties[J].Journal of Power Sources,2003(119/121):252-257. |
| [21] | Shiraishi K;Dokko K;Kanamura K .Formation of impurities on phospho-olivine LiFePO4 during hydrothermal synthesis[J].Journal of Power Sources,2005,146(1-2):555-558. |
| [22] | Gang Yang;Hongmei Ji;Haidong Liu;Kaifu Huo;Jijiang Fu;Paul K. Chu .Fast Preparation of LiFePO_4 Nanoparticles for Lithium Batteries by Microwave-Assisted Hydrothermal Method[J].Journal of nanoscience and nanotechnology,2010(2):980-986. |
| [23] | Huang YH;Park KS;Goodenough JB .Improving lithium batteries by tethering carbon-coated LiFePO4 to polypyrrole[J].Journal of the Electrochemical Society,2006(12):A2282-A2286. |
| [24] | Synthesis of carbon-coated LiFePO_4 nanoparticles with high rate performance in lithium secondary batteries[J].Journal of Power Sources,2010(11):3661. |
| [25] | George Ting-Kuo Fey;Yun Geng Chen;Hsien-Ming Kao .Electrochemical properties of LiFePO_4 prepared via ball-milling[J].Journal of Power Sources,2009(1):169-178. |
| [26] | Zhaohui Chen;J. R. Dahn .Reducing Carbon in LiFePO_4/C Composite Electrodes to Maximize Specific Energy, Volumetric Energy, and Tap Density[J].Journal of the Electrochemical Society,2002(9):A1184-A1189. |
| [27] | Endo M.;Nishimura K.;Fujino T.;Miyashita K.;Kim C. .Recent development of carbon materials for Li ion batteries[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(2):183-197. |
| [28] | En Mei Jin;Bo Jin;Kyung-Hee Park;Hal-Bon Gu;Gye-Choon Park;Ki-Won Kim .Electrochemical Characteristics of Lithium Iron Phosphate with Multi-Walled Carbon Nanotube for Lithium Polymer Batteries[J].Journal of nanoscience and nanotechnology,2008(10):5057-5061. |
| [29] | Li, XL;Kang, FY;Bai, XD;Shen, W .A novel network composite cathode of LiFePO4/multiwalled carbon nanotubes with high rate capability for lithium ion batteries[J].Electrochemistry communications,2007(4):663-666. |
| [30] | Jin B;Jin EM;Park KH;Gu HB .Electrochemical properties of LiFePO4-multiwalled carbon nanotubes composite cathode materials for lithium polymer battery[J].Electrochemistry communications,2008(10):1537-1540. |
| [31] | Xinlu Li;Feiyu Kang;Wanci Shen .Multiwalled carbon nanotubes as a conducting additive in a LiNi_(0.7)Co_(0.3)O_2 cathode for rechargeable lithium batteries[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(7):1334-1336. |
| [32] | Xinlu Li;Feiyu Kang;Wanci Shen .A Comparative Investigation on Multiwalled Carbon Nanotubes and Carbon Black as Conducting Additive in LiNi_(0.7)Co_(0.3)O_2[J].Electrochemical and solid-state letters,2006(3):A126-A129. |
| [33] | Zhang H X;Feng C;Zhai Y C et al.Cross-stacked carbon nanotube sheets uniformly loaded with SnO2 nanoparticles:A novel binder-free and high-capacity anode material for Lithium-ion batteries[J].Advanced Materials,2009,21(22):2299-2304. |
| [34] | Chen W X;Lee J Y;Liu Z L .The nanocomposites of carbon nanotube with Sb and SnSb0.5 as Li-ion battery anodes[J].CARBON,2003,41(05):959-966. |
| [35] | Shu-Fa Zheng;Jin-Song Hu;Liang-Shu Zhong .Introducing Dual Functional CNT Networks into CuO Nanomicrospheres toward Superior Electrode Materials for Lithium-Ion Batteries[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(11):3617-3622. |
| [36] | Xing Li;Meizhen Qu;Yongjian Huai;Zuolong Yu .Preparation and electrochemical performance of Li_4Ti_5O_(12)/carbon/carbon nano-tubes for lithium ion battery[J].Electrochimica Acta,2010(8):2978-2982. |
| [37] | Cao F F;Guo Y G;Zheng S F et al.Symbiotic coaxial nano-cables:Facile synthesis and an Eefficient and elegant morpho-logical solution to the Lithium storage problem[J].Chem Ma-ter,2010,22(05):1908-1914. |
| [38] | J. S. Sakamoto;B. Dunn .Vanadium Oxide-Carbon Nanotube Composite Electrodes for Use in Secondary Lithium Batteries[J].Journal of the Electrochemical Society,2002(1):A26-A30. |
| [39] | Kaoru Dokko;Mohamed Mohamedi;Minoru Umeda .Kinetic Study of Li-Ion Extraction and Insertion at LiMn_2O_4 Single Particle Electrodes Using Potential Step and Impedance Methods[J].Journal of the Electrochemical Society,2003(4):A425-A429. |
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