Salt-Templating Protocol To Realize Few-Layered Ultrasmall MoS2 Nanosheets Inlayed into Carbon Frameworks for Superior Lithium-Ion Batteries

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• 作者：Dayong Ren ; Yanjie Hu ; Haibo Jiang ; Zongnan Deng ; Saha Petr ; Hao Jiang ; Chunzhong Li
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：1148-1153
• 全文大小：374K
• ISSN：2168-0485

文摘

The preparation of few-layered ultrasmall MoS₂ nanosheets inlayed into carbon frameworks is challenging to date. Herein, we realize the synthesis of such meaningful nanohybrids (labeled as MoS₂/CFs hybrids) by a simple salt-templating protocol, where NaCl particles are chosen as a sacrificial template to grow MoS₂ crystals on the surface during the glucose carbonization, which meanwhile effectively inhibits their growth and stacking. In regard to electrochemical energy storage and conversion, the resulting MoS₂/CFs hybrids are beneficial for providing substantial and accessible electroactive sites as well as rapid electrons/ions transfer. The present hybrids, when applied as lithium-ion batteries anode materials, exhibit a remarkably enhanced reversible specific capacity as high as 1083.5 mAh g^–1 at 200 mA g^–1 with fast charge/discharge capability (465.4 mAh g^–1 at 6400 mA g^–1), which is much higher than the exfoliated MoS₂ nanosheets (only 97.6 mAh g^–1 at 6400 mA g^–1) and the commercial graphite. More impressively, our MoS₂/CFs hybrids simultaneously possess a superior cycle life with negligible capacity loss after 400 cycles at 1600 mA g^–1. In addition to the excellent lithium ion storage, our MoS₂/CFs hybrids may concurrently exhibit some intriguing properties for applications in other energy-related fields.