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Lithiophilic Cu‐CuO‐Ni Hybrid Structure: Advanced Current Collectors Toward Stable Lithium Metal Anodes
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-12 , DOI: 10.1002/adma.201705830 Shuilin Wu 1, 2 , Zhenyu Zhang 2 , Minhuan Lan 2, 3 , Shaoran Yang 1 , Junye Cheng 2 , Junjie Cai 1 , Jianhua Shen 2 , Ying Zhu 1 , Kaili Zhang 1 , Wenjun Zhang 2
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-12 , DOI: 10.1002/adma.201705830 Shuilin Wu 1, 2 , Zhenyu Zhang 2 , Minhuan Lan 2, 3 , Shaoran Yang 1 , Junye Cheng 2 , Junjie Cai 1 , Jianhua Shen 2 , Ying Zhu 1 , Kaili Zhang 1 , Wenjun Zhang 2
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Metallic lithium (Li) is a promising anode material for next‐generation rechargeable batteries. However, the dendrite growth of Li and repeated formation of solid electrolyte interface during Li plating and stripping result in low Coulombic efficiency, internal short circuits, and capacity decay, hampering its practical application. In the development of stable Li metal anode, the current collector is recognized as a critical component to regulate Li plating. In this work, a lithiophilic Cu‐CuO‐Ni hybrid structure is synthesized as a current collector for Li metal anodes. The low overpotential of CuO for Li nucleation and the uniform Li+ ion flux induced by the formation of Cu nanowire arrays enable effective suppression of the growth of Li dendrites. Moreover, the surface Cu layer can act as a protective layer to enhance structural durability of the hybrid structure in long‐term running. As a result, the Cu‐CuO‐Ni hybrid structure achieves a Coulombic efficiency above 95% for more than 250 cycles at a current density of 1 mA cm−2 and 580 h (290 cycles) stable repeated Li plating and stripping in a symmetric cell.
中文翻译：
Lithiophilic Cu‐CuO‐Ni杂化结构：先进的集电器可实现稳定的锂金属阳极
金属锂（Li）是下一代可充电电池的有希望的负极材料。然而，Li的枝晶生长和在电镀和剥离过程中重复形成固体电解质界面导致库仑效率低，内部短路和容量衰减，从而妨碍了其实际应用。在开发稳定的锂金属阳极中，集电器被认为是调节锂电镀的关键组分。在这项工作中，合成了一种亲锂的Cu-CuO-Ni杂化结构作为锂金属阳极的集电器。Cu形成Li核的低过电位和均匀的Li +由铜纳米线阵列的形成引起的离子通量能够有效抑制锂树枝状晶体的生长。此外，表面铜层可以充当保护层，以增强长期运行中混合结构的结构耐久性。结果，Cu-CuO-Ni杂化结构在1 mA cm -2的电流密度和580 h（290个循环）下，经过250个循环后，库仑效率达到95％以上，并稳定地重复进行对称的Li镀覆和剥离细胞。
更新日期：2018-01-12
中文翻译：
Lithiophilic Cu‐CuO‐Ni杂化结构：先进的集电器可实现稳定的锂金属阳极
金属锂（Li）是下一代可充电电池的有希望的负极材料。然而，Li的枝晶生长和在电镀和剥离过程中重复形成固体电解质界面导致库仑效率低，内部短路和容量衰减，从而妨碍了其实际应用。在开发稳定的锂金属阳极中，集电器被认为是调节锂电镀的关键组分。在这项工作中，合成了一种亲锂的Cu-CuO-Ni杂化结构作为锂金属阳极的集电器。Cu形成Li核的低过电位和均匀的Li +由铜纳米线阵列的形成引起的离子通量能够有效抑制锂树枝状晶体的生长。此外，表面铜层可以充当保护层，以增强长期运行中混合结构的结构耐久性。结果，Cu-CuO-Ni杂化结构在1 mA cm -2的电流密度和580 h（290个循环）下，经过250个循环后，库仑效率达到95％以上，并稳定地重复进行对称的Li镀覆和剥离细胞。
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