Lithium-sulfur (Li-S) batteries with high energy density are promising next-generation battery systems, but the limited power density, short cycle life and safety concerns caused by uncontrollable loss of active sulfur and severe growth of lithium dendrites impede their further development and broad applications. Herein, to address these issues, we report an ultra-durable composite gel electrolyte (u-CGE) that is capable of simultaneously stabilizing lithium metal anode and sulfur cathode. The u-CGE matrix is achieved via integrating zein protein nanofibers on super flexible nitrogen-doped carbon nanofabric leading to super mechanical durability and excellent electrolyte wettability/uptake. The resulting u-CGEs show high ionic conductivity (2.1 × 10^-3 S/cm), Li-ion transfer number (0.68), and excellent interfacial compatibility. Furthermore, benefiting from pyrrolic/pyridinic nitrogen (e.g. 15 wt%) on carbon structure and polar groups of zein protein nanofibers, the u-CGE effectively suppresses the growth of lithium dendrite and loss of active sulfur. As a result, long-lived (600 hrs) symmetric Li/Li cells with the u-CGEs display stable performance even at high current rates. More significantly, armed with the resulting u-CGE, the Li-S battery exhibits excellent rate stability (953 mAh/g at 2 A/g), in addition to the dramatically enhanced capacity and cycling stability.

具有高能量密度的锂硫（Li-S）电池是有前途的下一代电池系统，但由于无法控制的活性硫损失和锂枝晶的严重生长而导致的功率密度有限，循环寿命短和安全性问题阻碍了它们的进一步发展。和广泛的应用。在本文中，为了解决这些问题，我们报告了一种超耐用的复合凝胶电解质（u-CGE），它能够同时稳定锂金属阳极和硫阴极。u-CGE基质是通过将玉米醇溶蛋白蛋白纳米纤维整合在超柔韧的氮掺杂碳纳米纤维上而实现的，从而带来超强的机械耐久性和出色的电解质可湿性/吸收性。生成的u-CGE具有高离子电导率（2.1×10 ^-3S / cm），锂离子转移数（0.68）和出色的界面相容性。此外，u-CGE得益于玉米蛋白纳米纤维的碳结构和极性基团上的吡咯/吡啶氮（例如15 wt％），有效抑制了锂枝晶的生长和活性硫的损失。结果，即使在高电流速率下，具有u-CGE的长寿命（600小时）对称Li / Li电池也显示出稳定的性能。更重要的是，配备了最终的u-CGE的Li-S电池除了具有显着增强的容量和循环稳定性外，还具有出色的速率稳定性（在2 A / g时为953 mAh / g）。