These improvements are achieved by constructing double‐shelled hollow nanocages decorated with a cobalt nitride catalyst. The N‐doped hollow inner carbon shell not only serves as a physiochemical absorber for LiPSs, but also improves the electrical conductivity of the electrode; significantly suppressing shuttle effect. Cobalt nitride (Co4N) nanoparticles, embedded in nitrogen‐doped carbon in the outer shell, catalyze the conversion of LiPSs, leading to decreased polarization and fast kinetics during cycling. Theoretical study of the Li intercalation energetics confirms the improved catalytic activity of the Co4N compared to metallic Co catalyst. Altogether, the electrode shows large reversible capacity (1242 mAh g−1 at 0.1 C), robust stability (capacity retention of 658 mAh g−1 at 5 C after 400 cycles), and superior cycling stability at high sulfur loading (4.5 mg cm−2).
Zixu Sun, Sudarshan Vijay, Hendrik H. Heenen, Alex Yong, Sheng Eng, Wenguang Tu, Yunxing Zhao, See Wee Koh, Pingqi Gao, Zhi Wei Seh, Karen Chan, Hong Li
ADVANCED ENERGY MATERIALS, Volume: 10 Issue: 22, Article Number: 1904010
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