无机材料学报 ›› 2020, Vol. 35 ›› Issue (1): 105-111.DOI: 10.15541/jim20190161
所属专题: MAX相和MXene材料; 2020年能源材料论文精选(一) :金属离子电池&燃料电池; MXene材料专辑(2020~2021); 【虚拟专辑】锂离子电池(2020~2021)
收稿日期:
2019-04-18
修回日期:
2019-07-19
出版日期:
2020-01-20
网络出版日期:
2019-09-12
作者简介:
郭丝霖(1995-), 女, 硕士研究生. E-mail:guosilin@cigit.ac.cn
基金资助:
GUO Si-Lin1,2,KANG Shuai1,2(),LU Wen-Qiang1,2
Received:
2019-04-18
Revised:
2019-07-19
Published:
2020-01-20
Online:
2019-09-12
About author:
GUO Si-Lin (1995-), female, Master candidate. E-mail:guosilin@cigit.ac.cn
Supported by:
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 mAh/g, 载量为1 mg/cm 2; 载量提高到2 mg/cm 2时的比容量依然能达到450 mAh/g。
中图分类号:
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.
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.
图3 Ge/MXene 形貌分析(a~c)Ge/MXene的TEM照片; (b)低倍TEM照片, 图中的箭头指向明显的MXene片层; (c)高倍TEM照片, Ge颗粒被薄层碳包裹; (d)Ge/MXene的HADDF照片, 以及(e)C、(f)Ti和(g)Ge的EDS面分布图
Fig. 3 Morphology with analysis of Ge/MXene (a-c) TEM image of Ge/MXene; (b) Low magnification TEM image, the arrows points to typical MXene layers; (c) High magnification TEM image and thin carbon layer around Ge nanoparticle; (d) HADDF image of Ge/MXene; EDS mappings of (e) C, (f) Ti and (g) Ge
图4 不同退火时间制备的Ge/MXene的(a)XRD图谱和(b~f)TEM照片
Fig. 4 XRD patterns (a) of Ge/MXene with different annealing time and their TEM images (b-c) 0.5 h; (d-e) 1.5 h; (f) 3 h. Peaks marked with solid circles are from MXene and with cross are from Ge
图5 (a)Ge/MXene在不同倍率下的充放电曲线; 不同Ge含量的(b)倍率性能和 (c)交流阻抗图谱; 不同Ge含量的循环稳定性能(d)50wt%和(e)75wt%
Fig. 5 (a) Charge-discharge curves of Ge/MXene at different rate; (b) Rate performance, (c) EIS curves, and cycling performance of Ge/MXene with different Ge content ((d) 50wt% and (e) 75wt%)
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