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富磷相磷化钼-石墨复合材料的储锂性能研究

The Lithium-Ion Storage Performance of Phosphorus-Rich Phase Molybdenum Phosphides/Graphite Composite as Anode Material for Lithium-Ion Batteries
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摘要 过渡金属磷化物因较高的理论容量和合适的嵌锂电位而成为具有吸引力的锂离子负极材料.该文结合高温固相反应和球磨法制备了富磷相磷化钼-石墨(MoP_(2)/MoP/G)复合材料,该复合材料电极表现出良好的循环稳定性和优越的倍率性能,在500 mA·g^(-1)电流密度下经300次循环后的可逆放电比容量高达625.5 mAh·g^(-1);在100和4000 mA·g^(-1)的电流密度下的平均可逆放电比容量分别为637.7和379.2 mAh·g^(-1).通过电化学阻抗谱测试进一步分析了MoP_(2)/MoP/G复合材料电极的输运动力学.研究结果表明:MoP_(2)/MoP/G复合材料可用作高循环稳定性和高倍率性能的锂离子电池负极材料. Transition metal phosphides are regarded as a promising anode material due to its high conductivity,high theoretical capacities and apposite intercalation potential range.Herein,the phosphorus-rich phase molybdenum phosphides/graphite(MoP_(2)/MoP/G)composite is synthesized by combining a simple solid state reaction route followed and ball-balling process.As expected,the MoP_(2)/MoP/G electrode delivers a highly reversible discharge capacity of 625.5 mAh·g^(-1) at 500 mA·g^(-1) after 300 cycles,and provides a high capacity of 637.7 and 379.2 mAh·g^(-1) at 100 and 4000 mA·g^(-1) with excellent cycle and rate performance.The transport kinetics of the MoP_(2)/MoP/G electrode are further analyzed and revealed by electrochemical impedance spectra(EIS)measurements.The results show that MoP_(2)/MoP/G composites can be used as anode materials for high-performance lithium-ion batteries.
作者 余萍 刘浩燃 马子鑫 姜泓历 万梓淇 朱莉华 徐玮 柳剑鹏 YU Ping;LIU Haoran;MA Zixin;JIANG Hongli;WAN Ziqi;ZHU Lihua;XU Wei;LIU Jianpeng(School of Science,East China Jiaotong University,Nanchang Jiangxi 330013,China)
出处 《江西师范大学学报(自然科学版)》 北大核心 2025年第3期235-239,259,共6页 Journal of Jiangxi Normal University(Natural Science Edition)
基金 江西省教育厅科学技术研究课题(GJJ2200670,GJJ210660) 江西省大学生创新训练计划(S202310404031) 国家级大学生创新训练计划(202310404013) 江西省研究生创新专项基金(YC2023-S522)资助项目.
关键词 锂离子电池 富磷相磷化钼 负极材料 储锂性能 lithium-ion batteries phosphorus-rich phase molybdenum phosphides anodic material lithium storage performance
作者简介 余萍(1978-),女,江西临川人,讲师,主要从事光电材料与器件研究.E-mail:38483168@qq.com;通信作者:柳剑鹏(1989-),男,江西南昌人,实验师,主要从事激光等离子体相互作用、光电功能材料与应用研究.E-mail:downlance@126.com。
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