JOURNAL OF ALLOYS AND COMPOUNDS | 卷:858 |
A rod-on-tube CoMoO4@hydrogel composite as lithium-ion battery anode with high capacity and stable rate-performance | |
Article | |
Peng, Zhen1,2  Zhang, Haikuo3  Ali, Imran3  Li, Jinjin3  Ding, Yingyi2  Deng, Lin2  Han, Tianli2  Zhu, Hong4  Zeng, Xiangbing4  Cheng, Dong1  Cheng, Lei1  Liu, Jinyun2  | |
[1] Chaohu Univ, Coll Chem & Mat Engn, Engn Technol Res Ctr Preparat & Applicat Ind Cera, Hefei 238000, Anhui, Peoples R China | |
[2] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Lab Mol Based Mat, Key Lab Funct Mol Solids,Minist Educ, Wuhu 241000, Anhui, Peoples R China | |
[3] Shanghai Jiao Tong Univ, Dept Micronanoelect, Key Lab Thin Film & Microfabricat, Minist Educ, Shanghai 200240, Peoples R China | |
[4] Chery New Energy Vehicle Co Ltd, Div Power Battery Syst Res, Wuhu 241000, Anhui, Peoples R China | |
关键词: Secondary battery; binary Transition metal oxide; hierarchical Structure; Energy storage; Capacity; | |
DOI : 10.1016/j.jallcom.2020.157648 | |
来源: Elsevier | |
【 摘 要 】
Hierarchical materials have been considered promising for secondary battery electrodes owing to their capability of accommodating volumetric change of active materials and providing short pathways for rapid transportation of ions and electrons. Herein, we present a rod-on-tube composite consisting of cobalt molybdate (CoMoO4) nanotubes coating with polyaniline (PANI) hydrogel nanorods, which exhibits a high electrochemical performance as Li-ion battery anode. The hierarchical CoMoO4@PANI is prepared through in-situ polymerizing PANI nanorods on the CoMoO4 nanotubes. The rod-on-tube structure could alleviate the volumetric change of CoMoO4 during lithiation-delithiation, and improve conductivity for electron transfer. When cycling at 0.5 A g(-1), the presented CoMoO4@PANI anodes exhibit a large capacity of 805 mAh g(-1) after 150 cycles along with a Coulombic efficiency of 99%, which are both exceeding those of the pristine CoMoO4. A well-recoverable rate-performance is achieved. Furthermore, the density of state (DOS) and band gap of the CoMoO4@PANI and pristine CoMoO4 are also investigated by using density functional theory (DFT) calculations. (C) 2020 Elsevier B.V. All rights reserved.
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