| Green design of Cobalt dopant on Silica /Oxygen-Cobalt nanocomposite modified by Nitrogen doped Carbon nanocubes as a selective electrode for Lithium-Ion battery application |
| کد مقاله : 1103-CNF |
| نویسندگان |
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محمد مسلمی ورکی1، سهیلا جوادیان *2، مدیر اجرایی3 1دانشگاه تربیت مدرس 2انحمن 3استادیار |
| چکیده مقاله |
| In 21st century, rapid economic growth, unlimited industrial development, excessive use of fossil fuel and increasing human population have led to a serious alteration of the global environment, which has become a matter of concern. To ensure true sustainability for future generations and for the protection of earth’s environment, there is a worldwide search for alternative renewable energy resources that are non-polluting, eco-friendly, as well as has high efficiency to fulfill the energy demand. Along with highly trending renewable resources like solar power and wind energy, high performance rechargeable Li-ion batteries (LIBs) also have gained worldwide recognition as an efficient and long-term energy conversion and storage device for electric vehicles and grid applications. Thus, much effort has been devoted to developing more advanced and high-performing, next-generation Li-ion batteries. These could be the most advantageous secondary batteries with high specific energy and energy density, long cycle life as well as a significantly safe and environment friendly energy storage device. Graphite is the most common commercial anode material for lithium-ion batteries, however, its use in numerous ever-emerging applications including electric vehicles and large-scale sustainability energy storage system is limited by the low theoretical capacity (372 mAh g−1) and disappointing rate performance. Recently, Silica (SiO2) has garnered attention for use as an anode in lithium-ion batteries. Silica has a high specific capacity (the theoretical capacity: 1965 mAh g-1), low working potential (0.4 V vs. Li/Li+), good cycle stability, earth-abundant, low-cost processing and good environmental compatibility. However, the high expansion and shrinkage of the Silica volume during lithiation/delithiation (100%), low initial coulombic efficiency (52.38%), electrical conductivity (>10–1 S m−1), and solid electrolyte interphase formation resulted in damage to the electrode structure and caused a decrease in Silica performance as an anode for a lithium-ion battery. To address the issues relating to Silica anode, an inverted strategy is proposed to design the Silica nanoparticles@Carbon nanocubes in this work. The Silica@ Cobalt metal-organic frameworks (Co-MOF) as precursor is initially prepared by a simple liquid phase method of Zeolitic imidizolate framework-67 (ZIF-67) coatings on Silica nanoparticles. Carbon nanocubes coated and nitrogen-doped are then obtained by calcination in inert atmosphere. When this composites had been reduced at 600 °C and been used as an anode material in a lithium-ion battery, it showed high initial discharge capacity of 1021.61 mAh g−1 with Coulombic efficiency of 70.52% at the current density of 0.1 A g−1. Even at a high current density of 0.3 A g−1 for 100 cycles, it still maintains a specific capacity of 511.33 mA h g−1, indicating excellent electrochemical performance. This work presents a green approach for fabricating high-performance SiO2@C anodes from sustainable feedstocks, with significant application potential in LIBs. |
| کلیدواژه ها |
| Lithium-ion battery, Anode material, 〖SiO〗_2/ C anode, Metal-organic framework, Electrochemical performance |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |