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Facile hydrothermal treatment route of reed straw-derived hard carbon for high performance sodium ion battery
作者:Wang Jing, Yan Lei, Ren Qingjuan, Fan Linlin, Zhang Fuming, Zhi-qiang Shi
關鍵字:Hydrothermal treatment, Anode, Electrochemical behavior,Hard carbon, Sodium ion battery
論文來源:期刊
具體來源:Electrochimica Acta
發表時間:2018年
Although hard carbon is deemed to be the most potential industrialized sodium-ion batteries anode material, there are still some problems need to be solved. In this study, a waste biomass of reed straw is pretreated by using a new strategy-hydrothermal treatment instead of pickling and successfully transformed to hard carbon materials through subsequent carbonization process. The reed straw carbonized at 1300 degrees C exhibits an impressively high reversible capacity of 372.0 mAh g(-1) with excellent initial coulombic efficiency of 77.03% and outstanding cycling stability. Significantly, the sodiumstorage mechanism in our electrodes is mainly summarized into two models. Moreover, we find the interlayer spacing of graphite-like nanocrystal ofobtained hard carbon influences the sodium ion diffusion ability, thereby affecting the rate performance. Our work offers a simple and eco-friendly way for converting biomass to highly capacity carbon as well as a towardly anode material for sodium-ion batteries, which will open up new avenues of other biomass carbon materials with promising applications.
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