Blending two materials together to improve electrode performance has been proven an effective and practical strategy in the battery industry. Herein, we fabricate a novel n-HC/GeP₅ composite that doubles the energy density over hard carbon (HC) without sacrificing cycle stability and rate performance. The GeP₅, with high capacity (2289 mAh g⁻¹), ultra-high conductivity (2.4*10⁶ S m⁻¹) and high initial coulombic efficiency (ICE > 90%), enables it serve as an effective additive to HC at a low weight percent. By introducing 20% wt GeP₅ by mass ratio into HC, the obtained n-HC/GeP₅-20%wt composite improves the reversible capacity from 400 mAh g⁻¹ to 898 mAh g⁻¹, and improves ICE from 74% to 85%. In addition, the rate capability of n-HC/GeP₅, with 516 mAh g⁻¹ and 64% retention comparing 1C–8C, is much better than that of pure HC (273 mAh g⁻¹, 54% retention). Consequently, when tested at 1C and 8C for 550 cycles, large reversible capacity of 575 mAh g⁻¹ and 400 mAh g⁻¹ respectively can still be obtained for this n-HC/GeP₅-20% hybrid, revealing its great potential to be used in commercial battery products.

在电池行业中，将两种材料混合在一起以改善电极性能已被证明是一种有效且实用的策略。本文中，我们制造了一种新型的n-HC / GeP ₅复合材料，该复合材料在不牺牲循环稳定性和速率性能的情况下，使能量密度比硬碳（HC）翻了一番。GeP ₅具有高容量（2289 mAh g ^-1），超高电导率（2.4 * 10 ⁶  S m ^-1）和高初始库仑效率（ICE> 90％），使其成为HC的有效添加剂。低重量百分比。通过将20质量％的GeP ₅以质量比引入HC中，获得的n-HC / GeP ₅ -20％wt的复合材料将可逆容量从400 mAh g ^-1提高。至898 mAh g ^-1，并将ICE从74％提高至85％。此外，与1C-8C相比，n-HC / GeP ₅的速率能力为516 mAh g ^-1，保留率为64％，比纯HC（273 mAh g ^-1，保留率为54％）要好得多。因此，当在1C和8C下进行550次循环测试时，对于该n-HC / GeP ₅ -20％杂化物，仍可分别获得575 mAh g ^-1和400 mAh g ^-1的大可逆容量，这显示出其巨大的潜力用于商业电池产品。