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Synthesis of Cu2CO3(OH)2/SnO2@GO composite as novel anode material for lithium ion battery application
Chemical Physics ( IF 2.0 ) Pub Date : 2020-06-17 , DOI: 10.1016/j.chemphys.2020.110901
Shugui Quan , Xiao Chen , Huimin Wu , Jianwen Liu , Chuanqi Feng , Huakun Liu

Li-ion energy storage materials with high specific capacity and low cost have attracted much attention. Herein, a novel Cu2CO3(OH)2 composite modified with SnO2 nanowires and graphene oxide (GO) nanosheets (Cu2CO3(OH)2/SnO2@GO) termed as CC/SnO2@GO) for anode electrodes were synthesized by a solvothermal reaction. The expected compound are characterized by X ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetry (TG) techniques. The electrochemical properties for Cu2CO3(OH)2/SnO2@GO are tested by battery testing system. The results show that highly reversible capacities of 928.5 mAh g−1 at 200 mA g−1 are obtained with excellent coulombic efficiency closed to 100% after 200 cycles. Consider of strategy of synergistic effects, CC/SnO2@GO shows a low charge/discharge voltage platform (0.5–1.0 V). This material may be promising as a new candidate for high-energy anode material in lithium ion batteries.



中文翻译:

Cu 2 CO 3(OH)2 / SnO 2 @GO复合材料的合成作为锂离子电池应用的新型负极材料

高比容量,低成本的锂离子储能材料备受关注。本文中,用SnO 2纳米线和氧化石墨烯(GO)纳米片(称为CC / SnO 2 @GO的Cu 2 CO 3(OH)2 / SnO 2 @GO)改性的新型Cu 2 CO 3(OH)2复合物用于:阳极通过溶剂热反应合成。通过X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM)和热重分析(TG)技术表征期望的化合物。Cu 2 CO 3(OH)2的电化学性质/ SnO 2 @GO由电池测试系统测试。结果表明,在200mA g -1下获得了928.5mAh g -1的高度可逆容量,在200次循环后库仑效率接近100%。考虑到协同效应的策略,CC / SnO 2 @GO显示了低充电/放电电压平台(0.5–1.0 V)。这种材料有望成为锂离子电池中高能阳极材料的新候选材料。

更新日期:2020-07-01
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