Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 549, Issue -, Pages 225-235Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.04.076
Keywords
Heterogeneous dual-carbon shells; Silicon monoxide; Anode; Porous composite; Lithium-ion batteries
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Funding
- Sichuan Undergraduate Training Program for Innovation and Entrepreneurship [201810638084]
- Sichuan Science and Technology Program [2017JY0015]
- Education Department Foundation of Sichuan Province [17TD0036]
- Basal Research Funds of China West Normal University [17B004]
- Natural Science Foundation of China [51374175]
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To develop low-cost, high-capacity and long-life anode materials for lithium-ion batteries, glucose-C and F-doped C coated SiO composites with adjustable pore structure (p-SiO@gl-C@F-doped C) are synthesized by facile and scalable methods. The combination of the heterogeneous dual-carbon shells and porous structure significantly promotes the reaction kinetics of the electrode, effectively suppresses and buffers the volume expansion of SiO, and largely enhances the stability of solid electrolyte interface of the electrode. In a half cell, the optimized p-SiO@gl-C@F-doped C (7:3) composite shows a stable discharge capacity of 785 mAh g(-1) at a current density of 200 mA g(-1). The discharge capacity is maintained at 772 mAh g(-1) after 200 cycles. At a current density of 400 mA g(-1), the electrode shows a discharge capacity of 633 mAh g(-1) after 500 cycles, with a capacity degradation of similar to 0.0096% per cycle from the 2nd cycle to the 500th cycle. The full cell which is composed of the commercial LiFePO4 as a cathode and the optimized composite as an anode, exhibits high capacity and good cycling stability. (C) 2019 Elsevier Inc. All rights reserved.
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