期刊
RARE METALS
卷 39, 期 9, 页码 1082-1091出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-020-01464-8
关键词
Spindle-like CoCO3; Reduced graphene oxide; Precipitant-free synthesis; Hybrid anodes; Lithium-ion batteries
资金
- National Natural Science Foundation of China [51772127, 51772131]
- Taishan Scholars [ts201712050]
- Major Program of Shandong Province Natural Science Foundation [ZR2018ZB0317]
- Natural Science Doctoral Foundation of Shandong Province [ZR2019BEM038]
- Natural Science Doctoral Foundation of the University of Jinan [XBS1830]
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong
Recently, CoCO(3)has attracted enormous attention as anodes for lithium-ion batteries (LIBs), benefiting from its high theoretical capacity and simple synthesis. However, the modest electronic conductivity and structural instability over cycling hinder its wider applications. To well address the intrinsic issues, we explored a precipitant-free hydrothermal methodology for mass production of spindle-like CoCO3/reduced graphene oxide (S-CoCO3/rGO) toward advanced LIBs as a hybrid anode. The dimethylformamide plays a significant role of two birds (i.e., solvent and precipitant) with one stone in the formation of the S-CoCO3/rGO, greatly improving its practical applicability. The purposeful introduction of rGO nanosheets as a two-dimensional flexible conductive network enhances the conductivity and stability of the S-CoCO3. It is the structural and compositional merits for LIBs that endow the S-CoCO3/rGO with remarkable lithium-storage performance in terms of enhanced interfacial storage capacity, high-rate reversible capacities (803 mAh center dot g(-1)at 2.0 A center dot g(-1)) and long-duration capacity retention of 82.1% over 2000 consecutive cycles at 2.0 A center dot g(-1). More significantly, the simple yet efficient avenue here promises enormous commercial prospect of the S-CoCO3/rGO in next-generation LIBs.
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