Authors: Hong Lin, Zhiliang Guo, Qingchun Zhang, Qin Yang, Meng Wang, Yuanyuan Chen, Shiying Shen, Xijun Wei, Lixian Song, Yingze Song, Hui Pan
Published: 2024-08-08
Source: Full article
AbstractThe kinetically retarded sulfur evolution reactions and notorious lithium dendrites as the major obstacles hamper the practical implementation of lithium–sulfur batteries (LSBs). Dual metal atom catalysts as a new model are expected to show higher activity by their rational coupling. Herein, the dual‐atom catalyst with coupled Ni─Co atom pairs (Ni/Co‐DAC) is designed successfully by programmed approaches. The Ni─Co atom pairs alter the local electron structure and optimize the coordination configuration of Ni/Co‐DAC, leading to the coupling effect for promoting the interconversion of sulfur and guiding lithium plating/striping. The LSB delivers a remarkable capacity of 818 mA h g−1 at 3.0 C and a low degeneration rate of 0.053% per cycle over 500 cycles. Moreover, the LSB with a high sulfur mass loading of 6.1 mg cm−2 and lean electrolyte dosage of 6.0 µL mgS−1 shows a remarkable areal capacity of 5.7 mA h cm−2.