Nickel Hydroxide-Modified Sulfur/Carbon Composite as a High-Performance Cathode Material for Lithium Sulfur Battery

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• 作者：Xiao-Qing Niu ; Xiu-Li Wang ; Dong Xie ; Dong-Huang Wang ; Yi-Di Zhang ; Yi Li ; Ting Yu ; Jiang-Ping Tu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 5, 2015
• 年：2015
• 卷：7
• 期：30
• 页码：16715-16722
• 全文大小：531K
• ISSN：1944-8252

文摘

Tailored sulfur cathode is vital for the development of a high performance lithium鈥搒ulfur (Li鈥揝) battery. A surface modification on the sulfur/carbon composite would be an efficient strategy to enhance the cycling stability. Herein, we report a nickel hydroxide-modified sulfur/conductive carbon black composite (Ni(OH)₂@S/CCB) as the cathode material for the Li鈥揝 battery through the thermal treatment and chemical precipitation method. In this composite, the sublimed sulfur is stored in the CCB, followed by a surface modification of Ni(OH)₂ nanoparticles with size of 1鈥? nm. As a cathode for the Li鈥揝 battery, the as-prepared Ni(OH)₂@S/CCB electrode exhibits better cycle stability and higher rate discharge capacity, compared with the bare S/CCB electrode. The improved performance is largely due to the introduction of Ni(OH)₂ surface modification, which can effectively suppress the 鈥渟huttle effect鈥?of polysulfides, resulting in enhanced cycling life and higher capacity.