کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6469508 | 1423974 | 2017 | 4 صفحه PDF | دانلود رایگان |
- Rubidium and cesium ions are used as electrolyte additives for sodium-ion battery.
- Rb+ and Cs+ ions modify the solid electrolyte interphase.
- The performance of Na/HC(hard carbon) is improved by addition of Rb+ and Cs+ ions.
In this work, rubidium and cesium ions are studied as electrolyte additives for sodium-ion batteries. It is shown that adding small amount of Rb+ and Cs+ into the electrolyte significantly modifies the chemical composition of solid electrolyte interphase (SEI) on hard carbon (HC) surfaces, which results in a significant increase in the ionic conductivity and stability of the SEI. The results of this work show that a 0.05Â M addition in the form of MPF6 (MÂ =Â Rb or Cs) can increase the capacity retention of the Na/HC cells to 95.3% and 97.1% by the Rb+ and Cs+ ions, respectively, from 80.6% of the control cell after 100Â cycles.
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Journal: Electrochemistry Communications - Volume 83, October 2017, Pages 20-23