Synthesis and Electrochemical Property of Carbon Coated LiFePO4 Nanoplates

doi:10.15541/jim20180120

Abstract

Abstract:

To improve the rate performance of LiFePO₄ cathode material, LiFePO₄nanoplates were synthesized via one-step glycol-based solvothermal process. Additionally, carbon was employed to coat LiFePO₄ with glucose served as carbon source. The morphologies and electrochemical properties of the as-prepared materials were characterized by XRD, BET, SEM, TEM, cyclic voltammetry, etc. Results showed that LiFePO₄nanoplates had the size of approximately 150 nm×100 nm×60 nm, displaying a short b-axis. The rate performance of LiFePO₄ nanoplates was enhanced with the increment of carbon content, and the sample containing 6.4wt% carbon (LF0.2) exhibited the most outstanding electrochemical performance, which delivered discharge capacities of 157.3 mAh/g and 132.6 mAh/g at 0.2C and 10C rates, respectively. Meanwhile, excellent cycling stability of LF0.2, 80.2% capacity retention after 500 cycles at 5C rate, was observed.

Key words: LiFePO₄, nanoplate structure, solvothermal, rate performance, cycling performance

CLC Number:

O646

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.

Figures/Tables 9

Fig. 1 XRD patterns of LiFePO4/C samples

Fig. 2 N2 adsorption-desorption isotherms of LiFePO4/C samples

Fig. 3 SEM images of LiFePO4/C samples(a) LF0; (b)LF0.05; (c)LF0.1; (d)LF0.2

Fig. 4 TEM(a), HRTEM(b) and SEAD (c) images of LF0.2 sample

Fig. 5 CV curves of all LiFePO4/C samples

Fig. 6 (a) Specific capacities of all samples at various rates; Comparison of the third charging and discharging profiles of the all samples at (b) 0.2C rate and (c) 5C rate; (d) The dependency of the middle discharge voltage on current rate in the range of 0.2C to 10C

Fig. 7 Cycling performances of LiFePO4/C samples(a) 1C; (b) 5C

Fig. 8 (a) The EIS curves and the corresponding equivalent circuit model of LiFePO4/C samples; (b) Linear fitting of Z°-ω-1/2

Table 1 The fitting values of the resistance components in the simplified equivalent circuit and the Li+ diffusion coefficients.

Samples	R_S/Ω	R_F/Ω	R_ct/Ω	D⁺_Li/(×10^-13, cm²∙s^-1)
LF0	8.1	241.8	235.2	0.067
LF0.05	3.8	35.7	95.7	5.300
LF0.1	3.5	17.6	74.1	12.000
LF0.2	2.2	9.3	62.9	41.500

References 14

[1]	IONESCU E, KLEEBE H J, RIEDEL R.Silicon-containing polymer- derived ceramic nanocomposites (PDC-NCs): preparative approaches and properties.Chem. Soc. Rev., 2012, 41(15): 5032-5052.
[2]	FENG Y, LAI S Y, YANG L,et al. Polymer-derived porous Bi2WO6/SiC (O) ceramic nanocomposites with high photodegradation efficiency towards Rhodamine B. Ceram. Int., 2018, 44(7): 8562-8569.
[3]	COLOMBO P.Conventional and novel processing methods for cellular ceramics.Philos. Trans., 2006, 364(1838): 109-124.
[4]	YAN X J, SAHIMI M, TSOTSIS T T.Fabrication of high-surface area nanoporous SiOC ceramics using preceramic polymer precursors and a sacrificial template: precursor effects.Micropor. Mesopor. Mat., 2017, 241: 338-345.
[5]	VAKIFAHMETOGLU C, COLOMBO P.A direct method for the fabrication of macro-porous SiOC ceramics from preceramic polymers.Adv. Eng. Mater., 2008, 10(3): 256-259.
[6]	DIBANDJO P, DIRE S, BABONNEAU F,et al. Influence of the polymer architecture on the high temperature behavior of SiCO glasses: a comparison between linear- and cyclic-derived precursors. J. Non-Cryst. Solids, 2010, 356(3): 132-140.
[7]	FORTUNIAK W, POSPIECH P, MIZERSKA U,et al. Generation of meso- and microporous structures by pyrolysis of polysiloxane microspheres and by HF etching of SiOC microspheres. Ceram. Int., 2018, 44(1): 374-383.
[8]	VAKIFAHMETOGLU C, PRESSER V, YEON S H,et al. Enhanced hydrogen and methane gas storage of silicon oxycarbide derived carbon. Micropor. Mesopor. Mat., 2011, 144(1): 105-112.
[9]	SORARU G D, PENA-ALONSO R, LEONI M.C-rich micro/ mesoporous Si(B)OC:in situ diffraction analysis of the HF etching process. Micropor. Mesopor. Mat., 2013, 172: 125-130.
[10]	XU T H, MA Q S, CHEN Z H.High-temperature behavior of silicon oxycarbide glasses in air environment.Ceram. Int., 2011, 37(7): 2555-2559.
[11]	SAHA A, RAJ R.Crystallization maps for SiCO amorphous ceramics.J. Am. Ceram. Soc., 2007, 90(2): 578-583.
[12]	LI J K, LU K, LIN T S,et al. Preparation of micro-/meso porous SiOC bulk ceramics. J. Am. Ceram. Soc., 2015, 98(6): 1753-1761.
[13]	WU J Q, LI Y M, CHEN L M,et al .Simple fabrication of micro/ nano-porous SiOC foam from polysiloxane. J. Mater. Chem., 2012, 22(14): 6542-6545.
[14]	LIANG T, LI Y L, SU D,et al. Silicon oxycarbide ceramics with reduced carbon by pyrolysis of polysiloxanes in water vapor. J. Eur. Ceram. Soc., 2010, 30(12): 2677-2682.

[1]	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.
[2]	FU Yukun, ZENG Min, RAO Xianfa, ZHONG Shengwen, ZHANG Huijuan, YAO Wenli. Microwave-assisted Synthesis and Co, Al Co-modification of Ni-rich LiNi_0.8Mn_0.2O₂ Materials for Li-ion Battery Electrode [J]. Journal of Inorganic Materials, 2021, 36(7): 718-724.
[3]	SUN Tuanwei,ZHU Yingjie. One-step Solvothermal Synthesis of Strontium-doped Ultralong Hydroxyapatite Nanowires [J]. Journal of Inorganic Materials, 2020, 35(6): 724-728.
[4]	Jian-Huang KE, Kai XIE, Yu HAN, Wei-Wei SUN, Shi-Qiang LUO, Jin-Feng LIU. Morphology Controlling of the High-voltage Cathode Materials with Different Co-solvents [J]. Journal of Inorganic Materials, 2019, 34(6): 618-624.
[5]	SUI Li-Li, WANG Run, ZHAO Dan, SHEN Shu-Chang, SUN Li, XU Ying-Ming, CHENG Xiao-Li, HUO Li-Hua. Construction of Hierarchical α-MoO₃ Hollow Microspheres and Its High Adsorption Performance towards Organic Dyes [J]. Journal of Inorganic Materials, 2019, 34(2): 193-200.
[6]	ZHANG Yi-Qing, LIU Li, ZHANG Shu-Juan, WAN Zheng-Rui, LIU Hong-Ying, ZHOU Li-Qun. Preparation and Dehydrogenation Property of NH₂-UIO-66 Supported RuCuMo Nanocatalyst [J]. Journal of Inorganic Materials, 2019, 34(12): 1316-1324.
[7]	WANG Chao-Fei, LU Shuang, CHEN Hui-Long, GONG Fei-Long, GONG Yu-Yin, LI Feng. One-pot Synthesis and Application in Asymmetric Supercapacitors of Mn₃O₄@RGO Nanocomposites [J]. Journal of Inorganic Materials, 2016, 31(6): 581-587.
[8]	WU Xuan-Rong, YANG Qiao-Zhen, ZHAO Yong-Xiang, LU Yan-Luo. Hydrothermal/Solvothermal Synthesis and Photocatalytic Performance of ZnS Microspheres [J]. Journal of Inorganic Materials, 2016, 31(5): 473-478.
[9]	LI Bin, LI Ying-Lian, MO Shu-Yi, CHEN Ming-Guang, WANG Dong-Sheng, LONG Fei. Synthesis of Core-shell Structure In₂Se₃/Cuse Micro/Nano-powders Followed by Coated-rapid Heating Treatment Method for Preparing CuInSe₂ Thin Films [J]. Journal of Inorganic Materials, 2016, 31(10): 1135-1140.
[10]	WEI Jie, LI Xue-Dong, WANG Hong-Zhi, ZHANG Qing-Hong, LI Yao-Gang. Nitrogen Doped Carbon Quantum Dots/Titanium Dioxide Composites for Hydrogen Evolution under Sunlight [J]. Journal of Inorganic Materials, 2015, 30(9): 925-930.
[11]	LU Qing, HUA Luo-Guang, CHEN Yi-Lin, GAO Bi-Fen, LIN Bi-Zhou. Preparation and Property of Oxygen-deficient Bi₂WO_6-_x Photocatalyst Active in Visible Light [J]. Journal of Inorganic Materials, 2015, 30(4): 413-419.
[12]	CHEN Fei-Biao, WANG Ying-Nan, WU Bo-Rong, XIONG Yun-Kui, LIAO Wei-Ling, WU Feng, SUN Zhe. Preparation and Electrochemical Performance of Activation Graphene/Sulfur Complex Cathode Material for Lithium-sulfur Batteries [J]. Journal of Inorganic Materials, 2014, 29(6): 627-632.
[13]	ZHOU Chao, FENG Qing, GAO Yan-Min. Synthesis and Characterization of Cu₂ZnSnS₄ (CZTS) Powders by Solvothermal Method [J]. Journal of Inorganic Materials, 2014, 29(5): 487-492.
[14]	QIU Cai-Xia, YUAN Zhong-Zhi, LIU Ling, CHENG Si-Jie, LIU Jin-Cheng. Preparation and Characterization of Ge⁴⁺-doping Li₄Ti₅O₁₂ Anode Material for Li-ion Battery and Its Electrochemical Properties [J]. Journal of Inorganic Materials, 2013, 28(7): 727-732.
[15]	CAO Tie-Ping, LI Yue-Jun, WANG Chang-Hua. Preparation and Photocatalytic Property of NiO/ZnO Heterostructured Nanofibers [J]. Journal of Inorganic Materials, 2013, 28(3): 295-300.

Synthesis and Electrochemical Property of Carbon Coated LiFePO₄ Nanoplates

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 14

Related Articles 15

Recommended Articles

Metrics

Comments