硬碳因其稳定性好,来源广泛而成为钠离子电池负极材料商业化的理想选择。以废旧轮胎为原料,经过简单的除杂,在不同温度退火制得硬碳,对材料进行结构和电化学性能表征,优化最优退火温度并探究其作为钠离子电池负极材料的性能。结果表明:经1200℃煅烧的YT-1200展现出最优异的电化学性能。在电流密度为100mA/g时,首次可逆比容量达到261mAh/g,在循环200圈之后容量仍有235mAh/g。倍率性能也表现优异,在电流密度为2000mA/g时其比容量达到了206mAh/g。论证了以废旧轮胎为原料制备硬碳用于钠离子电池负极材料具备可行性。
Hard carbon is an ideal choice for the commercialization of anode materials for sodium-ion batteries(SIBs) due to its good stability and wide availability.Using waste tires as raw materials,through simple impurity removal,hard carbon was obtained by annealing at different temperatures.The structure and electrochemical properties of the material were characterized.The optimal annealing temperature was optimized,and explored its performance as a negative electrode material for SIBs.Experiments shown that YT-1200 calcined at 1200℃ exhibited the most excellent electrochemical performance.At a current density of 100mA/g,the first reversible specific capacity reached 261mAh/g,and the capacity remained 235mAh/g after 200 cycles.The rate performance was also excellent,with a specific capacity of 206mAh/g at a current density of 2000mA/g.It was demonstrated that it was feasible to prepare hard carbon from waste tires as a negative electrode material for SIBs.
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基金资助
中央高校基本科研业务费专项资金项目(2572020BU01)
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