Journal
APPLIED SURFACE SCIENCE
Volume 584, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.152580
Keywords
Lithium-ion batteries; Si/SiOx@C composite; Bamboo leaves; Catalytic-activation carbonation
Categories
Funding
- Guangdong Key Labora-tory of Battery Safety [2019B121203008]
- Guangzhou Science and Technology Planning Project [201704030022]
- Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Prov-ince [20200105]
- Bureau of Guangdong Forestry [2020KJCX008, 201805127]
- Science and Technology Program of the State Administration for Market Regulation of China [2020MK127]
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In this study, a facile method was developed to prepare porous Si/SiOx@C composite using low-cost raw materials. The as-prepared composite exhibits high capacity and outstanding rate performance as an anode material in lithium-ion batteries, offering a new approach for the preparation of anode materials for the next generation of LIBs.
Silicon oxides are considered as one of the most attractive anode materials of the high energy-density lithium-ion batteries (LIBs) owing to their high theoretical specific capacity and abundant reserves. In this study, a facile low temperature hydrothermal activation-catalytic carbonation and mild aluminothermic process have been developed to prepare porous Si/SiOx@C composite with fresh bamboo leaves as low-price raw materials. When evaluated as an anode material in LIBs, the as-prepared hierarchical porous Si/SiOx@C composite achieves a high capacity of 1075 mAh g-1 after 350 cycles under the current density of 200 mA g-1. Moreover, the good dispersion of the Si/SiOx matrix in porous carbon guarantees outstanding rate performances of the electrodes. When the current density increases to 1000 mA g-1, the considerable specific capacity of 470 mAh g-1 can be obtained after 450 cycles. This strategy opens a new avenue for economical and low-technology demanding preparation of multifunctional biomass-based anode materials for the next generation LIBs.
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