Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 27, Pages 13419-13427Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta04852e
Keywords
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Funding
- National Natural Science Foundation of China [51772249, 51521061]
- Fundamental Research Funds for the Central Universities [G2017KY0308]
- National Natural Science Foundation of Shaanxi Province [2018JM5092]
- Hongkong scholar program [XJ2017012]
- State Key Laboratory of Control and Simulation of Power System and Generation Equipment (Tsinghua University) [SKLD17KM02]
- Program of Introducing Talents of Discipline to Universities [B08040]
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Two-dimensional (2D) molybdenum disulfide (MoS2) has been extensively regarded as a promising host material for lithium ion batteries due to the reversible insertion of Li+ into the layered structures. However, achieving ultrafast and durable Li+ storage has a challenge of designing largely exposed edge-oriented and kinetically favorable MoS2-based nanostructures. Herein, we report an interfacial synthesis strategy for facile construction of ultrathin MoS2/N-doped carbon nanowires (MoS2/N-C NWs) (ca. 10 m in length) with a largely expanded (002) plane of MoS2 (d = 1.03 nm, vs. bulk 0.62 nm). This hierarchical nanowire configuration composed of edge-oriented and interlayer-expanded MoS2 nanosheets can not only effectively decrease the diffusion energy barriers for Li+ intercalation and improve the number of electrochemically active sites, but also provide fast electron pathways. As an anode for LIBs, the MoS2/N-C NWs demonstrate excellent rate capabilities (600 mA h g(-1) at 5 A g(-1) and 453 mA h g(-1) at 10 A g(-1)) and long-term durability (86.7% retention at 5 A g(-1) over 500 cycles). This study demonstrates the great potential of the MoS2/N-C NWs as promising anode materials for ultrafast lithium energy storage.
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