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首页> 外文期刊>Metallurgical and Materials Transactions, E. Materials for Energy Systems >A Novel Multiphase Sn-Sb-Cu Alloy Electrodeposited on 3D Interconnected Microporous Cu Current Collector as Negative Electrode for Lithium Ion Battery
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A Novel Multiphase Sn-Sb-Cu Alloy Electrodeposited on 3D Interconnected Microporous Cu Current Collector as Negative Electrode for Lithium Ion Battery

机译：在三维互连的微孔Cu集电体上电沉积的新型多相Sn-Sb-Cu合金作为锂离子电池的负电极

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摘要

We report a novel, active-active-inactive-type tin-antimony-copper alloy with dendritic morphology electrodeposited on 3D interconnected microporous copper foam (-70 μm pore diameter) as a promising high specific capacity anode for Li-ion batteries. The multiphase composition, SnSb and Cu_6Sn_5 "reactant" intermetallics embedded in Sn "matrix," alleviates the volumetric stress generated during cycling by lithiating at different step potentials (0.84, 0.66, 0.57, 0.42, 0.39, and 0.38 to 0.33 V vs Li/Li~+). Copper foam successfully acts as a stress buffer preventing both pulverization and delamination. This combination of properties in tin-antimony-copper anode on copper foam results in 2nd cycle discharge capacity of 723 mAh/ g, superior rate capability, and stable cycle retention with a capacity loss of 16 pct in the last 70 cycles at a rate of 400 mA/g (0.5 C) while preserving its structural integrity in comparison to tin-antimony-copper anode deposited on a planar copper foil as a current collector.
机译：我们在三维互连的微孔铜泡沫（-70μm孔径）上以三维互连的微孔铜泡沫（-70μm孔径）电沉积的新颖，活性活性活性型锡锑 - 铜合金作为锂离子电池的高度比容量阳极。嵌入在Sn“矩阵中的多相组合物，SNOSB和Cu_6SN_5”反应物“金属间金属间质量通过在不同的步长电位（0.84,0.66,0.57,0.42,0.39和0.38至0.33V与Li / 0.33V VS Li / Li / Li / Li / Li / Li /李〜+）。铜泡沫成功用作压力缓冲液，防止粉碎和分层。这种在铜泡沫上的锡锑 - 铜阳极中的性质的组合导致第二循环放电容量为723mAh / g，优异的速率能力和稳定的循环保留，并且在最后70个周期中的容量损失为16 pct以速度400 mA / g（0.5 c），同时保持其结构完整性与沉积在平面铜箔上的锡锑铜阳极作为集电器。

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