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Octagonal Flower‐like CuO/C/NF Nanocomposite as a Self‐Supporting Anode for High‐Performance Lithium‐Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-09-15 , DOI: 10.1002/celc.202000957 Ruili Zhang 1 , Xuehong Li 2 , Liping Ni 3 , Panpan Li 4 , Anjian Xie 1 , Yuhua Shen 5 , Li Lao 6
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-09-15 , DOI: 10.1002/celc.202000957 Ruili Zhang 1 , Xuehong Li 2 , Liping Ni 3 , Panpan Li 4 , Anjian Xie 1 , Yuhua Shen 5 , Li Lao 6
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At present, the high theoretical specific capacity CuO‐based anodes are considered as a potential host for lithium‐ion batteries (LIBs). Unfortunately, the intrinsic poor conductivity of metal oxide and the huge volume expansion during the cycling caused serve capacity fading and unsatisfactory cycling stability. Here, a porous free‐standing octagonal flower‐like copper oxide (CuO)/carbon(C)/nickel foam (NF) multilevel structure is synthesized. The design of carbon‐coated ensures excellent mechanical strength, chemical stability and conductivity of nanocomposite, which effectively prevent the collapse and corrosion of the active material during cycle. In addition, 3D interconnected structure shortened the transmission distance of electrons and Li+, improving the ability of fast charge and discharge. The CuO/C/NF electrode exhibits high performance in cycling as the anode material for LIBs. The initial charge/discharge specific capacity of the octagonal flower‐like CuO/C/NF electrode is 871.1 mA h g−1 and 916.06 mA h g−1 at 0.5 A g−1, respectively. It achieves an outstanding discharge specific capacity of 505 mA h g−1 at 2 A g−1 after 800 cycles. This work combines CuO with a conductive matrix (carbon) and a 3D porous NF, effectively enhancing the electrochemical properties of CuO, which is of certain significance to the further research.
中文翻译：
八角形花状CuO / C / NF纳米复合材料可作为高性能锂离子电池的自支撑阳极
目前，高理论比容量的基于CuO的阳极被认为是锂离子电池（LIB）的潜在宿主。不幸的是，金属氧化物固有的差的导电性以及在循环过程中的巨大体积膨胀导致服务容量衰减和不令人满意的循环稳定性。在此，合成了多孔的独立式八边形花状氧化铜（CuO）/碳（C）/镍泡沫（NF）多级结构。碳涂层的设计可确保出色的机械强度，化学稳定性和纳米复合材料的电导率，从而有效防止活性物质在循环过程中崩溃和腐蚀。此外，3D互连结构缩短了电子和Li +的传输距离，提高了快速充放电的能力。作为LIB的负极材料，CuO / C / NF电极在循环中表现出很高的性能。八角形花状CuO / C / NF电极在0.5 A g -1时的初始充电/放电比容量分别为871.1 mA h g -1和916.06 mA h g -1。经过800次循环后，在2 A g -1下达到了505 mA h g -1的出色放电比容量。这项工作将CuO与导电基质（碳）和3D多孔NF结合在一起，有效地增强了CuO的电化学性能，这对进一步研究具有一定的意义。
更新日期：2020-10-12
中文翻译：
八角形花状CuO / C / NF纳米复合材料可作为高性能锂离子电池的自支撑阳极
目前，高理论比容量的基于CuO的阳极被认为是锂离子电池（LIB）的潜在宿主。不幸的是，金属氧化物固有的差的导电性以及在循环过程中的巨大体积膨胀导致服务容量衰减和不令人满意的循环稳定性。在此，合成了多孔的独立式八边形花状氧化铜（CuO）/碳（C）/镍泡沫（NF）多级结构。碳涂层的设计可确保出色的机械强度，化学稳定性和纳米复合材料的电导率，从而有效防止活性物质在循环过程中崩溃和腐蚀。此外，3D互连结构缩短了电子和Li +的传输距离，提高了快速充放电的能力。作为LIB的负极材料，CuO / C / NF电极在循环中表现出很高的性能。八角形花状CuO / C / NF电极在0.5 A g -1时的初始充电/放电比容量分别为871.1 mA h g -1和916.06 mA h g -1。经过800次循环后，在2 A g -1下达到了505 mA h g -1的出色放电比容量。这项工作将CuO与导电基质（碳）和3D多孔NF结合在一起，有效地增强了CuO的电化学性能，这对进一步研究具有一定的意义。
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