- Title
- Synthesis of high reversibility anode composite materials using T-Nb₂O₅ and coal-based graphite for lithium-ion battery applications
- Creator
- Qu, Xiaoxiao; Liu, Yuhao; Li, Binbin; Xing, Baolin; Huang, Guangxu; Zhang, Chuanxiang; Hong, Suck Won; Yu, Jianglong; Cao, Yijun
- Relation
- Energy and Fuels Vol. 34, Issue 3, p. 3887-3894
- Publisher Link
- http://dx.doi.org/10.1021/acs.energyfuels.9b04106
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2020
- Description
- Nb₂O₅, as a potential electrochemical material, has been studied extensively due to its superior volumetric stability and safety. In the paper, we report a novel method for the synthesis of a T-Nb₂O₅/coal-based graphite (CBG) composite via a solvothermal method combined with calcination to overcome the limited low level of the ionic diffusivity and electric conductivity of Nb₂O₅. The homogeneous distribution of the Nb₂O₅ nanoparticles on the coal-based graphite surface can suppress the accumulation of Nb₂O₅ and reduce the internal resistance. As an anode material for Li-ion batteries, the T-Nb₂O₅/CBG–2 composite presents a high capacity, outstanding cyclic stability, and superior reversibility. The newly developed composite of T-Nb₂O₅/CBG–2 indicates an initial specific capacity of 378 and 661 mAh g–1 at 0.02 A g–1 in the charge/discharge process. At a current density of 0.2 A g–1, the T-Nb₂O₅/CBG–2 composite materials can maintain a stable capacity of 216 mAh g–1 after 100 cycles. Moreover, after the current density has returned to 0.02 A g–1, it is possible to recover a large capacity of 416 mAh g–1, which represents the excellent reversibility of T-Nb₂O₅/CBG-2.
- Subject
- composites; carbon; electrodes; anode materials; transition metals; SDG 7; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1461875
- Identifier
- uon:46324
- Identifier
- ISSN:0887-0624
- Language
- eng
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