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Preparation of cobalt sulfide@reduced graphene oxide nanocomposites with outstanding electrochemical behavior for lithium-ion batteries
RSC Advances ( IF 3.9 ) Pub Date : 2020-4-2 , DOI: 10.1039/d0ra01351j Junhai Wang 1 , Yongxing Zhang 2 , Jun Wang 3 , Lvlv Gao 3 , Zinan Jiang 3 , Haibo Ren 3 , Jiarui Huang 3
RSC Advances ( IF 3.9 ) Pub Date : 2020-4-2 , DOI: 10.1039/d0ra01351j Junhai Wang 1 , Yongxing Zhang 2 , Jun Wang 3 , Lvlv Gao 3 , Zinan Jiang 3 , Haibo Ren 3 , Jiarui Huang 3
Affiliation
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Cobalt sulfide@reduced graphene oxide composites were prepared through a simple solvothermal method. The cobalt sulfide@reduced graphene oxide composites are composed of cobalt sulfide nanoparticles uniformly attached on both sides of reduced graphene oxide. Some favorable electrochemical performances in specific capacity, cycling performance, and rate capability are achieved using the porous nanocomposites as an anode for lithium-ion batteries. In a half-cell, it exhibits a high specific capacity of 1253.9 mA h g−1 at 500 mA g−1 after 100 cycles. A full cell consists of the cobalt sulfide@reduced graphene oxide nanocomposite anode and a commercial LiCoO2 cathode, and is able to hold a high capacity of 574.7 mA h g−1 at 200 mA g−1 after 200 cycles. The reduced graphene oxide plays a key role in enhancing the electrical conductivity of the electrode materials; and it effectively prevents the cobalt sulfide nanoparticles from dropping off the electrode and buffers the volume variation during the discharge–charge process. The cobalt sulfide@reduced graphene oxide nanocomposites present great potential to be a promising anode material for lithium-ion batteries.
中文翻译：
具有优异锂离子电池电化学性能的硫化钴@还原氧化石墨烯纳米复合材料的制备
通过简单的溶剂热法制备了硫化钴@还原氧化石墨烯复合材料。硫化钴@还原氧化石墨烯复合材料由均匀附着在还原氧化石墨烯两侧的硫化钴纳米颗粒组成。使用多孔纳米复合材料作为锂离子电池的阳极，在比容量、循环性能和倍率性能方面实现了一些有利的电化学性能。在半电池中，100次循环后，它在500 mA g -1下表现出1253.9 mA hg -1的高比容量。全电池由硫化钴@还原氧化石墨烯纳米复合材料阳极和商用LiCoO 2阴极组成，在200 mA g -1下循环200次后能够保持574.7 mA hg -1的高容量。还原的氧化石墨烯对于增强电极材料的导电性起着关键作用；有效防止硫化钴纳米颗粒从电极上脱落，缓冲充放电过程中的体积变化。硫化钴@还原氧化石墨烯纳米复合材料具有成为锂离子电池负极材料的巨大潜力。
更新日期：2020-04-02
中文翻译：
具有优异锂离子电池电化学性能的硫化钴@还原氧化石墨烯纳米复合材料的制备
通过简单的溶剂热法制备了硫化钴@还原氧化石墨烯复合材料。硫化钴@还原氧化石墨烯复合材料由均匀附着在还原氧化石墨烯两侧的硫化钴纳米颗粒组成。使用多孔纳米复合材料作为锂离子电池的阳极，在比容量、循环性能和倍率性能方面实现了一些有利的电化学性能。在半电池中，100次循环后，它在500 mA g -1下表现出1253.9 mA hg -1的高比容量。全电池由硫化钴@还原氧化石墨烯纳米复合材料阳极和商用LiCoO 2阴极组成，在200 mA g -1下循环200次后能够保持574.7 mA hg -1的高容量。还原的氧化石墨烯对于增强电极材料的导电性起着关键作用；有效防止硫化钴纳米颗粒从电极上脱落，缓冲充放电过程中的体积变化。硫化钴@还原氧化石墨烯纳米复合材料具有成为锂离子电池负极材料的巨大潜力。
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