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首页> 外文期刊>Journal of power sources >Electrochemical performance of Na2Ti3O7/C negative electrode in ionic liquid electrolyte for sodium secondary batteries
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Electrochemical performance of Na2Ti3O7/C negative electrode in ionic liquid electrolyte for sodium secondary batteries

机译:Na2Ti3O7 / C负极在钠二次电池离子液体电解质中的电化学性能

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摘要

In this study, carbon-coated Na2Ti3O7 (Na2Ti3O7/C) is synthesized by a solid-state reaction method, and its charge-discharge characteristics as a negative electrode material in an ionic liquid electrolyte, Na [FSA]-[C(3)C(1)pyrr][FSA] (FSA = bis(fluorosulfonyl)amide; C(3)C(1)pyrr = N-methyl-N-propylpyrrolidinium), are investigated at 363 K. The Na2Ti3O7/C negative electrode shows an initial discharge capacity of 215 mAh (g-Na2Ti3O7/C)(-1) at a current rate of 20 mA (g-Na2Ti3O7/C)(-1) in the voltage range 0.01-2.5 V. The high discharge capacity of the Na2Ti3O7/C negative electrode is attributed to the high operation temperature in the Na[FSA]-[C(3)C(1)pyrr][FSA] ionic liquid electrolyte. Although high discharge capacity is achieved, the Na2Ti3O7/C negative electrode shows relatively poor cycle performance because of the irreversible insertion of some Na ions and the formation of cracks. (C) 2017 Elsevier B.V. All rights reserved.
机译:在这项研究中,通过固相反应法合成了碳包覆的Na2Ti3O7(Na2Ti3O7 / C),并作为离子液体电解质Na [FSA]-[C(3)中的负极材料,其充放电特性C(1)pyrr] [FSA](FSA =双(氟磺酰基)酰胺; C(3)C(1)pyrr = N-甲基-N-丙基吡咯烷鎓),在363 K下进行了研究。Na2Ti3O7/ C负极显示在0.01-2.5 V电压范围内,电流率为20 mA(g-Na2Ti3O7 / C)(-1)时,初始放电容量为215 mAh(g-Na2Ti3O7 / C)(-1)。 Na2Ti3O7 / C负极归因于Na [FSA]-[C(3)C(1)pyrr] [FSA]离子液体电解质的较高工作温度。尽管实现了高放电容量,但由于某些Na离子的不可逆插入和裂纹的形成,Na2Ti3O7 / C负极显示出相对较差的循环性能。 (C)2017 Elsevier B.V.保留所有权利。

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