Novel N-doped carbon encapsulation of nanoFe3O4 to improve electrochemical properties of lithium ion battery

被引：1

作者：

Xu, Lu ^{[1
]}

Sun, Wanzhou ^{[1
]}

Zhu, Aiping ^{[1
]}

机构：

[1] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2022年 / 26卷 / 10期

关键词：

Fe3O4; nanomaterials; N-Doped carbon; PANI; Composite materials; Lithium ion battery; METAL-ORGANIC FRAMEWORK; HIGH-PERFORMANCE ANODE; COATED FE3O4; HOLLOW SPHERES; STORAGE; NANOPARTICLES; NANOSPHERES; SHELL; NANOCRYSTALS; POLYANILINE;

D O I：

10.1007/s10008-022-05217-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

To solve the volume expansion problem of Fe3O4 nanoparticles (nmFe(3)O(4)), a facile, green, and industrializable preparation of N-doped carbon-encapsulated nmFe(3)O(4) (nmFe(3)O(4)@N-doped C) is designed. This nmFe(3)O(4)@N-doped C is prepared through pyrolysis in nitrogen atmosphere of nmFe(3)O(4) encapsulated by polyaniline (PANI@nmFe(3)O(4)) which is obtained through oxidative polymerization of aniline on the surface of nmFe(3)O(4). In comparison with the capacity (113 mAh g(-1) at 0.1C) of nmFe(3)O(4), the nmFe(3)O(4)@N-doped C electrode exhibits a high reversible capacity of 400 mAh g(-1) after 500 cycles. Even at 4C, the nmFe(3)O(4)@N-doped C electrode presents 160 mAh g(-1) capacity, which is much higher than 30 mAh g(-1) of the nmFe(3)O(4) electrode. The results suggest that the N-doped carbon shell layer obtained from PANI is effective to inhibit volume expansion of nmFe(3)O(4) core and maintain the electron and ion transport channels after long cycles.

引用

页码：2133 / 2142

页数：10

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