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- Title
Hypercrosslinked Polymerization Enabled N‐Doped Carbon Confined Fe<sub>2</sub>O<sub>3</sub> Facilitating Li Polysulfides Interface Conversion for Li–S Batteries.
- Authors
Lu, Yun; Qin, Jin‐Lei; Shen, Tao; Yu, Yu‐Feng; Chen, Ke; Hu, Ye‐Zhou; Liang, Jia‐Ning; Gong, Ming‐Xing; Zhang, Jing‐Jing; Wang, De‐Li
- Abstract
Facilitating phase conversion efficiency of Li polysulfides to Li2S and restraining the dissolution of Li polysulfides are critical for stable lithium–sulfur (Li–S) batteries. Herein, an in situ formed sulfiphilic superfine Fe2O3 nanocrystals confined in lithiophilic N‐doped microporous carbon (Fe2O3/N‐MC) is derived from one‐step hypercrosslinked polymerization. Uniquely, the dual active sites (Fe2O3 and N) in Fe2O3/N‐MC tend to form "FeS, LiO or LiN" bonding, and then synchronically enhancing the chemisorption and interface conversion ability of Li polysulfides. As a result, 80 wt% S is loaded on Fe2O3/N‐MC and the hybrid cathode delivers high mass capacity (730 mA h g‐1) and excellent cycling stability (87.1% capacity retention over 1000 cycles at 5.0 C). Especially, the cathode also exhibits a high reversible areal capacity of 3.69 mA h cm‐2 at a high areal loading (5.1 mg cm‐2) and a lean electrolyte/sulfur (E/S) ratio (7.5 µL mg‐1) over 500 cycles. This work is anticipated to deepen the comprehension of complex Li polysulfides interphase conversion processes and afford new thoughts for designing new host materials.
- Subjects
LITHIUM sulfur batteries; POLYSULFIDES; POLYMERIZATION; CARBON; CHEMISORPTION; FERRIC oxide
- Publication
Advanced Energy Materials, 2021, Vol 11, Issue 42, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202101780