Crosslinking-derived MnO/carbon hybrid with ultrasmall nanoparticles for increasing lithium storage capacity during cycling

被引：87

作者：

Kang, Danmiao ^{[1
]}

Liu, Qinglei ^{[1
]}

Si, Rui ^{[2
]}

Gu, Jiajun ^{[1
]}

Zhang, Wang ^{[1
]}

Zhang, Di ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[2] Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, 239 Zhangheng Rd, Shanghai 201204, Peoples R China

来源：

CARBON | 2016年 / 99卷

基金：

高等学校博士学科点专项科研基金;

关键词：

MANGANESE-DIOXIDE ELECTRODE; MNO2/ZN AQUEOUS BATTERY; CALCIUM-ALGINATE GELS; ANODE MATERIALS; ELECTROCHEMICAL PERFORMANCE; MNO NANOPARTICLES; GRAPHENE; NANOCOMPOSITES; COMPOSITE; XPS;

D O I：

10.1016/j.carbon.2015.11.068

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：

MnO/C hybrid with ultra-small MnO nanoparticles (5.2 nm) embedded in porous carbon is fabricated and applied as the anode material for lithium ion batteries. The MnO/C hybrid electrode exhibits excellent specific capacity of 820 mAh g(-1) at a current density of 100 mA g(-1) and also outstanding rate performance with specific capacity of 483 mAh g(-1) at a current density of 5000 mA g(-1). After cycling for 1000 times at 1000 mA g(-1), the specific capacity increases to 1625 mAh g(-1). The TEM photos show that the particles are broken into 2 nm particles after cycling. We also apply XAFS to detect the final state of the Mn in the hybrid electrodes and find that smaller MnO particles are oxidized to a mixture of Mn2O3 and MnO2. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：138 / 147

页数：10

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[1] Valence-band x-ray photoelectron spectroscopic studies of manganese and its oxides interpreted by cluster and band structure calculations [J].