A nanorod FeP@phosphorus-doped carbon composite for high-performance lithium -ion batteries

作者:Lin, C(Lin, Cheng)^[1,2];Hu, RZ(Hu, Renzong)^[1,2];Liu, J(Liu, Jun)^[1,2];Yang, LC(Yang, Lichun)^[1,2];Liu, JW(Liu, Jiangwen)^[1,2];Ouyang, LZ(Ouyang, Liuzhang)^[1,2,3];Zhu, M(Zhu, Min)^[1,2]

An iron phosphide (FeP) nanorods and phosphorus-doped carbon (P-C) composite (nanorod-FeP@P-C) has been successfully fabricated through a two-step strategy, that is, initial synthesis of Fe2P4O12@P-C precursor by polymerization and carbonization under argon atmosphere, followed by formation of FeP nanorods by reducing the Fe2P4O12 precursor with H-2. The nanorod-FeP@P-C material shows high specific surface area (255.21 m(2) g (1)) and the pore size distribution covers a broad range centered at 10 nm, indicating mesoporosity. Due to the synergistic effect of the nanorod structure improving the kinetics of Li+ insertion/extraction and the phosphorus-doped carbon enhancing material conductivity and alleviating volume change of the active material during charge discharge, nanorod-FeP@P-C shows excellent electrochemical performance as an anode in Li-ion batteries for both half- and full cells. For the half-cell, the nanorod-FeP@P-C composite delivers a Li-ion storage capacity of 714 mA h g(-1) at a current density of 100 mA g(-1). After cycling at 2 A g(-1) for 800 cycles, a capacity of 625 mA h g(-1) is remained. When the current density increases to 5 A g(-1), a capacity of 420 mA h g(-1) is retained, indicating superior rate capability. For the full cell, a nanorod-FeP L.IMnCoNiO2 battery exhibits stable reversible capacities of 367 mA h g(-1) (after 100 cycles) and 326 mA h g(-1) (after 300 cycles) at current densities of 200 and 500 mA g(-1), respectively. The work described here provides a promising anode material for Li-ion batteries, and the preparation route can be viewed as a reference for the synthesis of transition metal phosphides. (C) 2018 Elsevier B.V. All rights reserved.

作者关键词:Iron phosphide;Phosphorous-doped carbon;Phytic acid;Lithiumion battery

KeyWords Plus:NICKEL PHOSPHIDE NANOPARTICLES;HYDROGEN EVOLUTION REACTION;REDUCED GRAPHENE OXIDE;ANODE MATERIALS;HIGH-CAPACITY;ELECTROCHEMICAL PERFORMANCE;RECHARGEABLE BATTERIES;OXYGEN REDUCTION;METAL PHOSPHIDE;RATE CAPABILITY

通讯作者地址:Ouyang, LZ (通讯作者)

South China Univ Technol, Sch Mat Sci & Engn,Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China.

地址:

	[ 1 ] South China Univ Technol, Sch Mat Sci & Engn,Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China
	[ 2 ] South China Univ Technol, China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Guangdong, Peoples R China
	[ 3 ] South China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

电子邮件地址:meouyang@scut.edu.cn

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研究方向:Chemistry; Materials Science; Metallurgy & Metallurgical Engineering

Web of Science 类别:Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering