One-step preparation of layered molybdenum disulfide/multi-walled carbon nanotube composites for enhanced performance supercapacitor

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• 作者：Ke-Jing Huang ; ^{kejinghuang11@163.com" class="auth_mail} ; Lan Wang ; Ji-Zong Zhang ; Ling-Ling Wang ; Yan-Ping Mo
• 关键词：Molybdenum disulfide ; Multi-walled carbon nanotube ; Electrode materials ; Supercapacitor
• 刊名：Energy
• 出版年：1 April, 2014
• 年：2014
• 卷：67
• 期：Complete
• 页码：234-240
• 全文大小：1893 K

文摘

We report a simple strategy to prepare novel 2-dimensional graphene analog MoS₂/MWCNT (molybdenum disulfide/multi-walled carbon nanotube) composites as electrode material for supercapacitor. The MoS₂/MWCNT composites exhibit superior electrochemical performance to pure MWCNT and MoS₂. The composite shows a high specific capacitance of 452.7聽F聽g^鈭? at a current density of 1聽A聽g^鈭?, as compared to 69.2聽F聽g^鈭? for MWCNT and 149.6聽F聽g^鈭? for MoS₂. In addition, the cycling measurements show that the MoS₂/MWCNT composites maintain a specific capacitance of 412.2聽F聽g^鈭? at 1聽A聽g^鈭? after 1000 cycles corresponding to a reduction of capacitance of about 4.2%. The enhancement in supercapacitor is believed to be due to the layered MoS₂/MWCNT conductive network which promotes not only efficient charge transport and facilitates the electrolyte diffusion, but also prevents effectively the volume expansion/contraction and aggregation of electroactive materials during charge-discharge process.