Journal
ELECTROCHIMICA ACTA
Volume 291, Issue -, Pages 188-196Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.08.136
Keywords
Hydrothermal treatment; Anode; Electrochemical behavior; Hard carbon; Sodium ion battery
Categories
Funding
- National Natural Science Foundation of China [51603147]
- Tianjin application foundation and advanced technology research plan project [15ZCZDGX00270, 14RCHZGX00859]
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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 sodium storage mechanism in our electrodes is mainly summarized into two models. Moreover, we find the interlayer spacing of graphite-like nanocrystal of obtained 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. (C) 2018 Elsevier Ltd. All rights reserved.
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