Electrochemical Characterizations and Structure of Li0.99Na0.01FePO4/C as Cathode Material for Li-ion Battery

doi:10.3724/SP.J.1077.2011.00625

Abstract

Abstract: In order to improve the rate performance of lithium iron phosphate, Na⁺ doped LiFePO₄/C cathode materials were prepared by carbothermal reduction technology. Samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transfer infrared spectroscopy (FT-IR), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Their electrochemical performances were investigated by galvanostatic charge/discharge in terms of cycling performance and rate capability. The results show that the samples have well regulated olivine type structures without any impurity peaks. Na-doping improves the conductivity and the Li+ diffusion rate of composite materials and decreases the polarization of electrode, and enhances the cycling performance and rate capability effectively. Compared with LiFePO₄/C, Li_0.99Na_0.01FePO₄/C exhibits good electrode properties with discharge capacities of 147.6, 126.4 and 105.1 mAh/g at 0.5C, 2.0C and 5C rates, respectively. In addition, it has excellent cycle stability at different rates and good performance.

Key words: lithium ion battery, cathode material, LiFePO₄

CLC Number:

TQ911

LONG Yun-Fei, WANG Fan, LV Xiao-Yan, YANG Ke-Di, WEN Yan-Xuan. Electrochemical Characterizations and Structure of Li_0.99Na_0.01FePO₄/C as Cathode Material for Li-ion Battery[J]. Journal of Inorganic Materials, 2011, 26(6): 625-630.

References

[1] Padhi A K, Nanjundaswamy K S, Goodenough J B. Phospho- olivines as positive-electrode materials for rechargeable lithium batteries. Journal of the Electrochemical Society, 1997, 144(4): 1188-1194.

[2] Yamada A, Hosoya M, Chung S C, et al. Olivine-type cathodes: achievements and problems. Journal of Power Sources, 2003, 119-121(S1): 232-238.

[3] Akira K, Shinya S, Masaru M. High-rate properties of LiFePO4/carbon composites as cathode materials for lithium-ion batteries. Ceramics International, 2008, 34(4): 863-866.

[4] 何雨石, 廖小珍, 马紫峰, 等(HE Yu-Shi, et al). LiFePO4/C复合正极材料的制备及其电化学性能研究. 稀有金属材料与工程(Rare Metal Mat. Eng.), 2007, 36(9): 1644-1648.

[5] Wang G X, Yang S L, Bewlay S L, et al. Electrochemical properties of carbon coated LiFePO4 cathode materials. Journal of Power Sources, 2005, 146(1/2): 521-524.

[6] Croce F, Epifanio A D, Hassoun J, et al. A novel concept for the synthesis of an improved LiFePO4 lithium battery cathode. Electrochem. Solid State Lett. , 2002, 5(3): 47-50.

[7] Park K S, Son J T, Chung H T, et al. Surface modification by silver coating for imp roving electrochemical p roperties of LiFePO4. Solid State Commun. , 2004, 129(5): 311-313.

[8] Chung S Y, Bloking J T, Chiang Y M. Electronically conductive phosphor-olivines as lithium storage electrodes. Nature Materials, 2002, 1(2): A123-A128.

[9] 任兆刚, 瞿美臻, 于作龙(REN Zhao-Gang, et al). LiFeP0.95B0.05O4-δ/C的制备及电化学性能研究. 无机材料学报(Journal of Inorganic Materials), 2010, 25(3): 230-234.

[10] 王恩通, 刘根庆, 任引哲. 锂离子电池正极材料LiFePO4 在Fe位掺杂的研究进展. 化学研究, 2007, 18(1): 93-97.

[11] 杨勇, 张忠如, 朱昌宝. 基于磷位掺杂的磷酸铁锂正极材料及其制备方法.申请号: 200710008713.2, 2007.03.16.

[12] 张中太, 罗绍华, 唐子龙, 等. 氧位掺杂型磷酸铁锂粉体的制备方法.申请号: 200510112562.6, 2005.10.11.

[13] Ouyang C Y, Wang D Y, Shi S Q, et al. First principles study on NaxLi1-xFePO4 as cathode material for rechargeable lithium batteries. Chinese Physics Letters, 2006, 23(1): 61-64.

[14] Nuquist R A. Infrared spectra of inorganic compounds (3800-45cm-1). New York: Academic Press, 1997.

[15] Bi H L, Allal I N, Yacoub I A, et al. Thermal physical and spectroscopic investigations of P2O5-A2MoO4-A2O (A=Li, Na) glasses. Phys. Chem. Glasses, 1999, 40(4): 229-234.

[16] Xu J W, Gilsond F R, Butler I S. FT-Raman and high-pressure FT-infrared spectroscopic investigation of monocalcium phosphatemonohydrate: Ca(H2PO4)2·H2O. Spectrochimica Acta, 1998, 54(12): 1869-1878.

[17] 韩恩山, 冯智辉, 魏子海, 等. 共沉淀法合成磷酸铁锂掺碳复合正极材料. 无机盐工业, 2008, 40(1): 22-25.

[18] 杨威, 曹传堂, 曹传宝. 共沉淀法制备锂离子电池正极材料LiFePO4及其性能研究. 材料工程, 2005, (6): 36-40.

Electrochemical Characterizations and Structure of Li_0.99Na_0.01FePO₄/C as Cathode Material for Li-ion Battery

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	CHENG Jie, ZHOU Yue, LUO Xintao, GAO Meiting, LUO Sifei, CAI Danmin, WU Xueyin, ZHU Licai, YUAN Zhongzhi. Construction and Electrochemical Properties of Yolk-shell Structured FeF₃·0.33H₂O@N-doped Graphene Nanoboxes [J]. Journal of Inorganic Materials, 2024, 39(3): 299-305.
[2]	HU Mengfei, HUANG Liping, LI He, ZHANG Guojun, WU Houzheng. Research Progress on Hard Carbon Anode for Li/Na-ion Batteries [J]. Journal of Inorganic Materials, 2024, 39(1): 32-44.
[3]	KONG Guoqiang, LENG Mingzhe, ZHOU Zhanrong, XIA Chi, SHEN Xiaofang. Sb Doped O3 Type Na_0.9Ni_0.5Mn_0.3Ti_0.2O₂ Cathode Material for Na-ion Battery [J]. Journal of Inorganic Materials, 2023, 38(6): 656-662.
[4]	YANG Zhuo, LU Yong, ZHAO Qing, CHEN Jun. X-ray Diffraction Rietveld Refinement and Its Application in Cathode Materials for Lithium-ion Batteries [J]. Journal of Inorganic Materials, 2023, 38(6): 589-605.
[5]	LI Tao, CAO Pengfei, HU Litao, XIA Yong, CHEN Yi, LIU Yuejun, SUN Aokui. NH₄⁺ Assisted Interlayer-expansion of MoS₂: Preparation and Its Zinc Storage Performance [J]. Journal of Inorganic Materials, 2023, 38(1): 79-86.
[6]	WANG Yang, FAN Guangxin, LIU Pei, YIN Jinpei, LIU Baozhong, ZHU Linjian, LUO Chengguo. Microscopic Mechanism of K⁺ Doping on Performance of Lithium Manganese Cathode for Li-ion Battery [J]. Journal of Inorganic Materials, 2022, 37(9): 1023-1029.
[7]	LI Wenbo, HUANG Minsong, LI Yueming, LI Chilin. CoS₂ as Cathode Material for Magnesium Batteries with Dual-salt Electrolytes [J]. Journal of Inorganic Materials, 2022, 37(2): 173-181.
[8]	ZHAN Jing,XU Changfan,LONG Yiyu,LI Qihou. Bi₂Mn₄O₁₀: Preparation by Polyacrylamide Gel Method and Electrochemical Performance [J]. Journal of Inorganic Materials, 2020, 35(7): 827-833.
[9]	WANG Wu-Lian, ZHANG Jun, WANG Qiu-Shi, CHEN Liang, LIU Zhao-Ping. High-quality Fe₄[Fe(CN)₆]₃ Nanocubes: Synthesis and Electrochemical Performance as Cathode Material for Aqueous Sodium-ion Battery [J]. Journal of Inorganic Materials, 2019, 34(12): 1301-1308.
[10]	WANG Jia-Hu, WANG Wen-Xin, DU Peng, HU Fang-Dong, JIANG Xiao-Lei, YANG Jian. Synthesis of Na₃V₂(PO₄)₂F₃@V₂O_5-_x as Cathode Material for Sodium-ion Battery [J]. Journal of Inorganic Materials, 2019, 34(10): 1097-1102.
[11]	LEE Sai-Xi, WANG Xue-Yin, GU Qing-Wen, XIA Yong-Gao, LIU Zhao-Ping, HE Jie. Tuning Electrochemical Performance through Non-stoichiometric Compositions in High-voltage Spinel Cathode Materials [J]. Journal of Inorganic Materials, 2018, 33(9): 993-1000.
[12]	LUO Ling-Hong, HU Jia-Xing, CHENG Liang, XU Xu, WU Ye-Fan, LIN You-Chen. Performance of the Composite Cathode Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-_δ-Ce_0.9Gd_0.1O_2-_δ for Medium-low Temperature Solid Oxide Fuel Cell [J]. Journal of Inorganic Materials, 2018, 33(4): 441-446.
[13]	CAI Jian-Xin, LI Zhi-Peng, LI Wei, ZHAO Peng-Fei, YANG Zhen-Yu, YU Ji. Synthesis and Electrochemical Performance of Fe₂O₃ Nanofibers as Anode Materials for LIBs [J]. Journal of Inorganic Materials, 2018, 33(3): 301-306.
[14]	LI Ling, LI Yun-Jiao, XU Bin, LU Wei-Sheng, SU Qian-Ye, CHEN Yong-Xiang, LI Lin. LiNi_xCo_yMn_1-_x_-_yO₂ Cathode Material Synthesized through Construction of E-pH Diagram and Its Electrochemical Performance [J]. Journal of Inorganic Materials, 2018, 33(3): 320-324.
[15]	WANG Qi, PENG Da-Chun, MA Qian, HE Yue-De, LIU Hong-Bo. Synthesis and Electrochemical Property of Carbon Coated LiFePO₄ Nanoplates [J]. Journal of Inorganic Materials, 2018, 33(12): 1349-1354.