“自上而下”方法制备少层石墨用作高容量铝离子电池正极
“Top-Down” Method Derived Few-Layer Graphite as Cathode Material for High-Capacity Aluminum-Ion Battery
作者单位E-mail
刘东海 煤基低碳能源国家重点实验室, 廊坊 065001
新奥科技发展有限公司, 廊坊 065001 
liudonghaic@enn.cn 
王俊明 煤基低碳能源国家重点实验室, 廊坊 065001
新奥科技发展有限公司, 廊坊 065001 
 
范卫超 煤基低碳能源国家重点实验室, 廊坊 065001
新奥科技发展有限公司, 廊坊 065001 
 
房金刚 煤基低碳能源国家重点实验室, 廊坊 065001
新奥科技发展有限公司, 廊坊 065001 
 
朱晓军 煤基低碳能源国家重点实验室, 廊坊 065001
新奥科技发展有限公司, 廊坊 065001 
 
孟垂舟 煤基低碳能源国家重点实验室, 廊坊 065001
新奥科技发展有限公司, 廊坊 065001
河北工业大学机械工程学院, 天津 300130 
2018108@hebut.edu.cn 
摘要: 采用“自上而下”方法制备了具有少片层、小尺寸特征且晶型结构完美的石墨材料,通过增加离子嵌入位点的方式,突破传统石墨作为正极材料的固有容量限制,提升铝离子电池的电化学储能性能。扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)等测试结果表明,该方法可以在不破坏石墨材料本身结构的前提下,有效实现对石墨片层的剥离,并且可以通过调节球磨时间的方式实现对石墨片层厚度和尺寸的调控。电化学测试结果表明,在3C的大电流密度下,以剥离的石墨材料为正极的铝离子电池放电容量可以达到93 mAh·g-1,在10C的高倍率下,放电容量仍保持在68 mAh·g-1,并显示出优异的循环性能。另外,该方法制备工艺简单、成本低廉,为促进高容量、长寿命铝离子电池的商业化应用打下了良好的基础。
关键词: 电化学  铝离子电池  石墨  正极材料  球磨  自上而下
基金项目: 河北省重点研发计划项目(No.18394405D)和国家重点基础研究发展计划(973计划)(No.2014CB249200)资助。
Abstract: A novel easily-scalable "top-down" method was used to prepare graphite cathode materials with chara-cteristics of few layers, small size and defect-free, which further increases the embedding sites of ions and breaks the inherent capacity limitation of graphite, so as to improve the electrochemical performance of aluminum ion batteries. Scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD) were used to characterize the properties of graphite materials, indicating that the proposed "top-down" method is able to realize the stripping of graphite without destroying the structure and achieve effective control of the thickness and size of graphite layer by adjusting the ball milling time. Electrochemical test results showed that the discharge capacities of G-48 reached 93 mAh·g-1 under a current density of 3C and still retained 68 mAh·g-1 under a high current density of 10C with excellent cycling performance. In addition, the preparation process is simple and low cost, which provides a good foundation for promoting the commercial application of the high-capacity and long-life aluminum ion batteries.
Keywords: electrochemistry  aluminum ion battery  graphite  cathode materials  ball-milling  top-down
投稿时间:2019-04-01 修订日期:2019-05-29
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刘东海,王俊明,范卫超,房金刚,朱晓军,孟垂舟.“自上而下”方法制备少层石墨用作高容量铝离子电池正极[J].无机化学学报,2019,35(8):1411-1418.
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