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| 一步法制备锗/MXene复合材料及其作为锂离子电池负极的研究 | |
| 引用本文： | 郭丝霖,康帅,陆文强. 一步法制备锗/MXene复合材料及其作为锂离子电池负极的研究[J]. 无机材料学报, 2020, 35(1): 105-111. DOI: 10.15541/jim20190161 |
| 作者姓名： | 郭丝霖 康帅 陆文强 |
| 作者单位： | 中国科学院 重庆绿色智能技术研究院, 重庆 400714 中国科学院大学, 重庆 400714 |
| 基金项目： | 中国科学院青年创新促进会(2019374);中国科学院重庆绿色智能技术研究院青年创新基金(Y82A240H10);重庆市留学归国人员创新创业支持计划(cx2018152) |
| 摘 要： | 通过化学溶液法一步制备锗/MXene复合材料,在MXene表面均匀负载了锗金属纳米颗粒。采用SEM和TEM对Ge/MXene复合材料进行了微观形貌分析,探索了复合材料的形成过程,结果表明,Ge/MXene复合材料是二维结构形貌,其元素分布均一。用Ge/MXene复合材料制备了电极,并组装成纽扣电池进行充放电性能测试,对电池的比容量、倍率、循环稳定性能进行了系统分析。测试结果表明,Ge含量为50%时的电化学性能最佳,0.2C下第5～100圈的容量稳定在1200 m Ah/g,载量为1 mg/cm2;载量提高到2 mg/cm2时的比容量依然能达到450 m Ah/g。 |
| 关 键 词： | MXene 锗纳米颗粒 锂离子电池 负极材料 |
| 收稿时间： | 2019-04-18 |
| 修稿时间： | 2019-07-19 |
Ge Nanoparticles in MXene Sheets: One-step Synthesis and Highly Improved Electrochemical Property in Lithium-ion Batteries |
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| GUO Si-Lin,KANG Shuai,LU Wen-Qiang. Ge Nanoparticles in MXene Sheets: One-step Synthesis and Highly Improved Electrochemical Property in Lithium-ion Batteries[J]. Journal of Inorganic Materials, 2020, 35(1): 105-111. DOI: 10.15541/jim20190161 | |
| Authors: | GUO Si-Lin KANG Shuai LU Wen-Qiang |
| Affiliation: | Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China University of Chinese Academy of Sciences, Chongqing 400714, China |
| Abstract: | Ge nanoparticles were synthesized uniformly on MXene sheets via a one-step chemical solution method. Morphology of Ge/MXene was characterized by SEM and TEM. Formation process and optimized synthesis condition was analyzed carefully. Ge/MXene was used as anode for lithium-ion batteries. Their electrochemical performances, including capacity, rate and cycling stability, were tested and evaluated. Ge/MXene exhibited a greatly improved capacity of 1200 mAh/g during the first hundred cycles at 0.2C with a loading of 1 mg/cm 2. A capacity of 450 mAh/g at a higher loading of 2 mg/cm 2 was obtained after 100 cycles. The excellence in electrochemistry is attributed to the high conductivity of MXene and its accommodable interlayer space. |
| Keywords: | MXene Ge nanoparticles lithium-ion batteries anode materials |
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