Tin - based composite oxides anode materials for lithium - ion thin - film batteries have been prepared by high - erergy ball - milling method.The phase evolution,morphology and electrochemical properties of the mater...Tin - based composite oxides anode materials for lithium - ion thin - film batteries have been prepared by high - erergy ball - milling method.The phase evolution,morphology and electrochemical properties of the materials were investigated by X - ray diffraction,scanning electron microscopy,cyclic voltammetry,charge - discharge test.The re - sults show milling can cause the stannous oxide crystal losing its crystalli ne character and becoming the amor - phous structure.The particle size of the powder materials decreases with the increase of ball - milling time.The re - versible specific capacity is more than578mAh·g -1 and its capacity loss per cycle is only0.31%after being cy - cled20times,which indicates that the material prepared by this method has go od electrochemical behavior and may be a candidate for the next generation anode materials for lithiumn ion batteries.展开更多
运用电化学阻抗谱和循环伏安法研究了在1 mol/L L iPF6-EC/DEC/DMC电解液中,不同甲醇杂质含量对石墨电极性能的影响及其机制.结果表明,甲醇对石墨电极性能的影响与电解液中甲醇的含量有关;其对石墨电极性能的影响机制为甲醇在2.0 V左右...运用电化学阻抗谱和循环伏安法研究了在1 mol/L L iPF6-EC/DEC/DMC电解液中,不同甲醇杂质含量对石墨电极性能的影响及其机制.结果表明,甲醇对石墨电极性能的影响与电解液中甲醇的含量有关;其对石墨电极性能的影响机制为甲醇在2.0 V左右还原生成的甲氧基锂沉积在石墨电极表面上,形成一层初始SEI膜,影响了EC的还原分解成膜过程.展开更多
文摘Tin - based composite oxides anode materials for lithium - ion thin - film batteries have been prepared by high - erergy ball - milling method.The phase evolution,morphology and electrochemical properties of the materials were investigated by X - ray diffraction,scanning electron microscopy,cyclic voltammetry,charge - discharge test.The re - sults show milling can cause the stannous oxide crystal losing its crystalli ne character and becoming the amor - phous structure.The particle size of the powder materials decreases with the increase of ball - milling time.The re - versible specific capacity is more than578mAh·g -1 and its capacity loss per cycle is only0.31%after being cy - cled20times,which indicates that the material prepared by this method has go od electrochemical behavior and may be a candidate for the next generation anode materials for lithiumn ion batteries.
文摘运用电化学阻抗谱和循环伏安法研究了在1 mol/L L iPF6-EC/DEC/DMC电解液中,不同甲醇杂质含量对石墨电极性能的影响及其机制.结果表明,甲醇对石墨电极性能的影响与电解液中甲醇的含量有关;其对石墨电极性能的影响机制为甲醇在2.0 V左右还原生成的甲氧基锂沉积在石墨电极表面上,形成一层初始SEI膜,影响了EC的还原分解成膜过程.
