The monoclinic GeP with large capacity, low plateau, and high initial coulombic efficiency (ICE) has been proved to be alternative anode for Li-ion batteries. However, the heavy use of Ge raw material with its high price, hinders its further development. Herein, the Zn atom is proposed for substitution into GeP and replaces part of the Ge owing to its low price, suitable plateau, and similar radius. Interestingly, a novel Ge_1−xZn_xP solid solution with a wide range tunable region (0.143 < x < 0.6) is achieved, reducing the heavy use of Ge and cutting the GeP price down. More intriguingly, such Ge_1−xZn_xP possesses a new phase, different from monoclinic GeP, which is first verified to be a cubic system in F-43m. Compared to semi-conducting GeP, this cubic Ge_1−xZn_xP phase possesses metallic conductivity, thus enabling a better rate performance than monoclinic GeP (e.g., 881 vs 283 mAh g⁻¹ at 2000 mA g⁻¹), while keeping the great advantages of large capacity, low plateau, and high ICE of GeP as well. Consequently, the assembled LiCoO₂//Ge_1−xZn_xP full cell exhibits large capacity over 1000 mAh g⁻¹. This unique phase control strategy by atomic substitution can be easily extended to manipulate electrochemical behaviors of other multi-phase materials toward advanced energy storage.

中文翻译：

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通过 Zn 取代触发 GeP 从单斜晶系到立方晶系的相变，形成用于锂离子电池的高倍率 Ge1−xZnxP 固溶体阳极

具有大容量、低平台和高初始库仑效率 (ICE) 的单斜晶系 GeP 已被证明是锂离子电池的替代阳极。然而，大量使用锗原料且价格昂贵，阻碍了其进一步发展。在此，由于Zn原子价格低廉、平台合适、半径相似，建议将Zn原子取代到GeP中并取代部分Ge。有趣的是，实现了具有宽范围可调区域 (0.143 < x < 0.6)的新型 Ge _1−x Zn _x P 固溶体  ，减少了 Ge 的大量使用并降低了 GeP 价格。更有趣的是，这样的 Ge _1−x Zn _xP 具有不同于单斜晶系 GeP 的新相，它在 F-43m 中首次被验证为立方晶系。与半导体 GeP 相比，这种立方 Ge _1−x Zn _x P 相具有金属导电性，因此比单斜 GeP 具有更好的倍率性能（例如，881 vs 283 mAh g ^-1在 2000 mA g ^-1），同时保持以及GeP的大容量、低平台、高ICE的巨大优势。因此，组装的 LiCoO ₂ //Ge _1−x Zn _x P 全电池表现出超过 1000 mAh g ^{−1的大容量}. 这种通过原子取代的独特相控制策略可以很容易地扩展到操纵其他多相材料的电化学行为以实现高级储能。