期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 530, 期 -, 页码 127-136出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.06.057
关键词
Ni-1,3,5-benzenetricarboxylate; Morphology tuning; Flower-like; Lithium-ion batteries
资金
- National Key R&D Program of China [2017YFB0903502]
- National Natural Science Foundation of China [51372278, U1507106, 51772332]
- Hunan Provincial Science and Technology Plan Project, China [2016TP1007, 2017TP1001]
- Hunan Provincial Natural Science Foundation of China [2018112485]
- Innovation-Driven Project of Central South University [2016CXS031]
The performance of energy storage materials is substantially dependent on their nanostructures. Herein, Ni-1,3,5-benzenetricarboxylate metal-organic frameworks (Ni-BTC MOFs) with different morphologies are controllably synthesized using a facile solvothermal method by simply adjusting the solvent and their electrochemical performance as an anode material for lithium-ion batteries is thoroughly investigated. Among the synthesized Ni-BTC MOFs with different morphologies, a hierarchical mesoporous flower-like Ni-BTC MOF (Ni-BTCEtOH) assembled from two-dimensional nanosheets shows the best electrochemical properties including a high capacity of 1085 mA h g(-1) at 100 mA (358 mA h g(-)1 at 5000 mA g(-1)), excellent cycling stability at 1000 mA g(-1) for 1000 cycles, and great rate performance, which is superior to most of the reported MOF-based anode materials for lithium-ion batteries. The outstanding electrochemical performance of Ni-BTCEtOH is originated from its unique and stable hierarchical mesoporous morphology with a high specific surface area and improved electrical/ionic conductivity. Moreover, our study demonstrates that the charge-discharge mechanism of the Ni-BTCEtOH electrode involves the insertion/extraction of Li ions to/from the organic moieties in Ni-BTCEtOH during the charge-discharge process without the direct engagement of Ni2+. This work highlights that the nanostructure design is an effective strategy to obtain promising energy storage materials. (C) 2018 Elsevier Inc. All rights reserved.
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