Tin Dioxide/Graphene Composite for Sodium-Ion-Based Dual-Ion-Batteries
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    Abstract:

    The dual-ion battery (DIB) system has attracted great attention owing to its merits of low cost, high energy, and environmental friendliness. However, the DIB based on sodium-ion electrolytes is seldom reported due to the lack of appropriate anode materials for reversible sodium-ion insertion/extraction. Herein, a new sodium-ion based DIB named as SnO2/GF//EG DIB using composite of SnO2 loading on graphene as anode and expanded graphite as cathode is constructed and optimized for the first time. The flexible graphene provides a robust porous structure and proper pore size to accommodate the large volume change of SnO2 nanoparticles, and the continuous graphene network of electrode material also provides better electrical conductivity and more effective lithium ion diffusion path. The material shows excellent cycling stability with high reversible specific capacity (69.9% capacity retention, ca. 279 mAhg-1 after 300 cycles at 1 Ag-1, capacity remains at around 97.4 mAhg-1, 88.5 mAhg-1, 75.5 mAhg-1, 70.4 mAhg-1 and 67.2 mAhg-1 at current densities of 200 mAg-1, 500 mAg-1, 1 000 mAg-1, 1 500 mAg-1 and 2 000 mAg-1, respectively). In a word, we study the electrochemical performance of Tin dioxide composite in the sodium ion based dual ion battery for the first time and the battery with excellent rate capability and cycling stability.

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ZHANG Miao, ZHOU Xiaoyan, TANG Yongbing. Tin Dioxide/Graphene Composite for Sodium-Ion-Based Dual-Ion-Batteries[J]. Journal of Integration Technology,2019,8(2):53-65

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  • Online: March 20,2019
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