Long-term cycling of core-shell Fe3O4-Polypyrrole composite electrodes via diffusive and capacitive lithiation

被引：12

作者：

Chu, Ruixia ^{[1
]}

Tan, Donggui ^{[2
]}

Zhang, Jie ^{[1
]}

Chen, Yanli ^{[1
,2
]}

Jiang, Heng ^{[1
,2
]}

Lin, Jie ^{[2
]}

Li, Lei ^{[2
]}

Zhang, Ying ^{[3
]}

Guo, Hang ^{[1
,3
,4
]}

机构：

[1] Pen Tung Sah Inst Micronano Sci & Technol, Xiamen, Peoples R China

[2] Xiamen Univ, Coll Mat, Xiamen, Peoples R China

[3] Xiamen Univ Malaysia, Sepang 43900, Malaysia

[4] Xiamen Univ, Shenzhen Res Inst, Shenzhen, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 835卷

基金：

中国国家自然科学基金;

关键词：

Fe3O4-PPy; Core-shell morphology; Porosity; Diffusive lithiation; Capacitive lithiation; LITHIUM-ION BATTERIES; BINDER-FREE ANODE; ELECTROCHEMICAL PERFORMANCE; FE3O4/C COMPOSITE; MICROSPHERES; NANOSPHERES; NANOFIBERS;

D O I：

10.1016/j.jallcom.2020.155192

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Core-shell Fe3O4-polypyrrole (Fe3O4-PPy) composites are synthesized by etching and polymerization to address the capacity degradation and low Coulombic efficiency (CE) of the Fe3O4 electrodes for lithium storage. When the weight content of Fe3O4 is 60%, a conformal carbon-coated Fe3O4 composite is formed, which can retain a charge capacity of 451 mAh g(-1) after 800 cycles at 2 C with a high initial CE of 74.8%. The diffusive and capacitive contribution to the capacity are evulated, demonstating the advantages of the synergistic lithiation of the Fe3O4-PPy electrodes. (C) 2020 Published by Elsevier B.V.

引用

页数：7

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