The uncontrollable dendrite growth is the most critical barrier that hinders the practical applications of Li metal anodes. Herein, a novel lithiophilic and mixed ion/electron conductive current collector is constructed via a facile in-situ activation process of nickel sulfide on the Nickel foam (NF). Such current collector exhibits excellent lithiophilicity, high Li diffusion coefficient and electron conductivity due to its unique vertical-aligned and interconnected arrays consisting of lithium sulfide and nickel on NF skeleton. Especially, the mixed ion/electron conductive arrays not only effectively regulate the ionic flux and electric field, but also provide continuous pathways for the fast transportation of both the Li and electron. As a result, the growth of Li dendrites is suppressed. Moreover, full cells with low Negative/positive (N/P) ratio exhibit superior cycling stability, high-capacity retention and outstanding rate performance. Typically, full cells pairing with LiFePO (LFP) cathodes with a N/P ratio of 6.3 show long-term cycling for over 700 and 350 cycles at high rates of 5C and 10C, delivering ultrahigh capacity retentions of over 95.7% and 86.4%, respectively. Even with an ultralow N/P ratio of 1.2 with LFP loading of 2.45 mAh cm, the full cell still shows excellent cycling stability for over 130 cycles. This work sheds new light on the development of dendrite-free Li metal anodes for high-performance Li metal batteries with lithiophilic and ion/electron dual-regulated current collector.

中文翻译：

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原位构建亲锂离子/电子双调节集流体用于高稳定性锂金属电池

不可控的枝晶生长是阻碍锂金属负极实际应用的最关键障碍。在此，通过硫化镍在泡沫镍（NF）上的简单原位活化过程构建了一种新型亲锂和混合离子/电子导电集流体。这种集流体由于其独特的由NF骨架上的硫化锂和镍组成的垂直排列和互连阵列而表现出优异的亲锂性、高锂扩散系数和电子传导性。特别是，混合离子/电子导电阵列不仅有效地调节离子通量和电场，而且还为锂和电子的快速传输提供连续的路径。结果，锂枝晶的生长受到抑制。此外，具有低负/正（N/P）比的全电池表现出优异的循环稳定性、高容量保持率和出色的倍率性能。通常，与 N/P 比为 6.3 的 LiFePO (LFP) 阴极配对的全电池在 5C 和 10C 高倍率下表现出超过 700 和 350 次循环的长期循环，提供超过 95.7% 和 86.4% 的超高容量保持率，分别。即使具有 1.2 的超低 N/P 比和 2.45 mAh cm 的 LFP 负载，全电池在超过 130 个循环中仍然表现出出色的循环稳定性。这项工作为开发具有亲锂和离子/电子双调节集流体的高性能锂金属电池的无枝晶锂金属负极提供了新的思路。