Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 29, Pages 12129-12138Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202004048
Keywords
batteries; cathode hosts; lithium-sulfur batteries; molybdenum nitride; sandwich structures
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Funding
- National Key R&D Program of China [2016YFB0901600]
- National Natural Science Foundation of China [U1830113, 51772313, 21975276, 51802334]
- Key Program of the Chinese Academy of Sciences [KFZD-SW-320]
- China Postdoctoral Science Foundation [2019M652155]
- Open Fund of the State Key Laboratory on Integrated Optoelectronics [IOSKL2017KF08M]
- Shanghai Science and Technology Committee [16DZ2270100]
- Ningbo 3315 program
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Herein, we propose the construction of a sandwich-structured host filled with continuous 2D catalysis-conduction interfaces. This MoN-C-MoN trilayer architecture causes the strong conformal adsorption of S/Li2Sx and its high-efficiency conversion on the two-sided nitride polar surfaces, which are supplied with high-flux electron transfer from the buried carbon interlayer. The 3D self-assembly of these 2D sandwich structures further reinforces the interconnection of conductive and catalytic networks. The maximized exposure of adsorptive/catalytic planes endows the MoN-C@S electrode with excellent cycling stability and high rate performance even under high S loading and low host surface area. The high conductivity of this trilayer texture does not compromise the capacity retention after the S content is increased. Such a job-synergistic mode between catalytic and conductive functions guarantees the homogeneous deposition of S/Li2Sx, and avoids thick and devitalized accumulation (electrode passivation) even after high-rate and long-term cycling.
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