Highly monodisperse dumbbell-like yolk-shell manganese monoxide/carbon microspheres for lithium storage and their lithiation evolution

被引：28

作者：

Chen, Junjie ^{[1
,2
]}

Yang, Ke ^{[1
]}

Yu, Huyan ^{[1
]}

Shah, Tariq ^{[1
]}

Zhang, Qiuyu ^{[1
,2
]}

Zhang, Baoliang ^{[1
,3
]}

机构：

[1] Northwestern Polytech Univ, Sch Chem & Chem Engn, Xian 710129, Peoples R China

[2] Northwestern Polytech Univ, Xian Key Lab Funct Organ Porous Mat, Xian 710072, Peoples R China

[3] Sunresins New Mat Co Ltd, Xian 710072, Peoples R China

来源：

CARBON | 2020年 / 170卷

基金：

中国国家自然科学基金;

关键词：

MnO/C microspheres; Dumbbell-like; Yolk-shell structure; Monodispersity; Lithiation evolution; HIGH-PERFORMANCE ANODE; MNO NANOPARTICLES; CARBON NANOTUBES; GRAPHENE; BATTERY; NANOSHEETS; EFFICIENT; CAPACITY;

D O I：

10.1016/j.carbon.2020.08.005

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：

Herein, a novel dumbbell-like MnO/C microspheres with the yolk-shell structure, high monodispersity and regular morphology are successfully prepared by calcining precursors MnCO3/RF microspheres under the vacuum condition. The effects of calcination temperature on morphology, carbonization degrees of carbon shells and pore properties of MnO/C microspheres are systematically investigated. Benefited from the yolk-shell structure, reasonable distribution of MnO nanocrystals and porous structure, MnO/C microspheres prepared at 550 degrees C exhibit high reversible capacity of 852.6 mAh/g at 1.32C over 500 cycles, long-term cycling stability (888.4 mAh/g at 2.64C over 400 cycles) and excellent rate performance (454.39 mAh/g at 6.60C and 253.28 mAh/g at 13.20C are remained). Furthermore, the lithiation evolution of MnO/C microspheres in the long-term cycling process at nano- and micro-scales are revealed and the LiCoO2 parallel to MnO/C full cell present a great cyclic stability. Dumbbell-like MnO/C microspheres demonstrate potential applications for next-generation Li-ion batteries as anode materials profited from superior electrochemical performance. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页码：37 / 48

页数：12

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