Molybdenum disulfide(MoS2)was loaded on biocarbon using waste camellia dregs(CDs)as the carbon source,which was further coated with dopamine hydrochloride to construct biocarbon/MoS2 electrode composites.The electroch...Molybdenum disulfide(MoS2)was loaded on biocarbon using waste camellia dregs(CDs)as the carbon source,which was further coated with dopamine hydrochloride to construct biocarbon/MoS2 electrode composites.The electrochemical lithium storage performance of the composites with different MoS2 contents was investigated.SEM results demonstrated that the composite had a three-dimensional foam-like structure with MoS2 as the interlayer.XRD and HRTEM tests revealed that MoS2 interlayer spacing in the composite was expanded.XPS analysis showed that new Mo—N bonds were formed in the active material.The electrochemical tests showed that the composite with a MoS2 content of 63%had a high initial specific capacity of 1434 mA·h/g at a current density of 100 mA/g.After a long cycle at a high current,it also showed good cycling stability and the capacity retention was nearly 100%.In addition,it had good lithium ion deintercalation ability in the electrochemical kinetics test.展开更多
为了研究苯丙氨酸的电化学储锂活性,首先借助傅立叶红外光谱(FTIR)和扫描电镜(SEM)对苯丙氨酸的微观结构及形貌进行了表征,然后将其用作锂离子电池负极活性材料,并通过恒流充/放电、循环伏安(CV)和交流阻抗(AC)技术研究了其电化学脱/嵌...为了研究苯丙氨酸的电化学储锂活性,首先借助傅立叶红外光谱(FTIR)和扫描电镜(SEM)对苯丙氨酸的微观结构及形貌进行了表征,然后将其用作锂离子电池负极活性材料,并通过恒流充/放电、循环伏安(CV)和交流阻抗(AC)技术研究了其电化学脱/嵌锂性能。结果表明:苯丙氨酸负极材料在0.1 C循环充/放电50次后,可逆放电比容量为55.2 m Ah·g-1;同时表现了良好的倍率性能,表明有机苯丙氨酸作为锂离子电池负极活性材料的良好可行性。展开更多
基金The authors are grateful for the financial supports from the National Natural Science Foundation of China(50702020,81171461)the Natural Science Foundation of Hunan Province,China(2017JJ2040)the Young Teacher Promotion Fund by Hunan University,China,the Fundamental Research Funds of the Central Universities,China.
文摘Molybdenum disulfide(MoS2)was loaded on biocarbon using waste camellia dregs(CDs)as the carbon source,which was further coated with dopamine hydrochloride to construct biocarbon/MoS2 electrode composites.The electrochemical lithium storage performance of the composites with different MoS2 contents was investigated.SEM results demonstrated that the composite had a three-dimensional foam-like structure with MoS2 as the interlayer.XRD and HRTEM tests revealed that MoS2 interlayer spacing in the composite was expanded.XPS analysis showed that new Mo—N bonds were formed in the active material.The electrochemical tests showed that the composite with a MoS2 content of 63%had a high initial specific capacity of 1434 mA·h/g at a current density of 100 mA/g.After a long cycle at a high current,it also showed good cycling stability and the capacity retention was nearly 100%.In addition,it had good lithium ion deintercalation ability in the electrochemical kinetics test.
文摘为了研究苯丙氨酸的电化学储锂活性,首先借助傅立叶红外光谱(FTIR)和扫描电镜(SEM)对苯丙氨酸的微观结构及形貌进行了表征,然后将其用作锂离子电池负极活性材料,并通过恒流充/放电、循环伏安(CV)和交流阻抗(AC)技术研究了其电化学脱/嵌锂性能。结果表明:苯丙氨酸负极材料在0.1 C循环充/放电50次后,可逆放电比容量为55.2 m Ah·g-1;同时表现了良好的倍率性能,表明有机苯丙氨酸作为锂离子电池负极活性材料的良好可行性。
