Engineering Vertical Aligned MoS₂ on Graphene Sheet Towards Thin Film Lithium Ion Battery

详细信息    查看全文

• 作者：Jianjiang He^a ; ^b ; Chuanjian Zhang^a ; Huiping Du^a ; Shengliang Zhang^a ; Pu Hu^a ; Zhonghua Zhang^a ; Yulei Ma^a ; Changshui Huang^a ; ^{huangcs@qibebt.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Guanglei Cui^a
• 关键词：Vertical aligned MoS2 ; graphene ; lithium ion batteries ; CVD method ; thin film
• 刊名：Electrochimica Acta
• 出版年：2015
• 出版时间：1 October 2015
• 年：2015
• 卷：178
• 期：Complete
• 页码：476-483
• 全文大小：2843 K

文摘

Ultrathin MoS₂ nanosheets vertically aligned on the single layer graphene sheet (MoS₂-NS/G) were synthesized by a simple CVD method. It is found that the single layer graphene plays important roles not only in the synthesis process but also in the electrochemical performance. The favorable vertical design can offer remarkable advantages such as fast electron transport/collect ion and ion diffusion, reduced charge-transfer resistance, and facile accommodation of the strains caused by lithium intercalation and deintercalation. The MoS₂-NS/G was calculated to show the highest capacity of 620 mAh g⁻¹ in these electrodes at a large current density of 4 A g⁻¹ for 1000 cycles. It also delivers a good long-life cycling performance at high capacity of 1040 mAh g⁻¹. Additionally, the excellent rate performance of MoS₂-NS/G may be due to the heterostructure of graphene and MoS₂. It is also found that the charge storage of MoS₂ contains capacitive process. Because electrons can directly transport from the current collector to the electrolyte along MoS₂ basal planes, the need for carbon black and binder is eliminated. It is believed that the MoS₂-NS/G also has immense potential for applications in supercapacitor.