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SiOC functionalization of MoS2 as a means to improve stability as sodium-ion battery anode

机译:SIOC官能化MOS2作为提高稳定性作为钠离子电池阳极的手段

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摘要

The development of feasible, scalable, and environmentally-safe electrode materials that provide stable cycling performance are critical for success of beyond lithium rechargeable batteries and supercapacitors. With respect to the sodium-ion battery (SIB) anodes constituting of transition metal dichalcogenides such as molybdenum disulfide (MoS2), poor cycle stability and fast capacity degradation, due to low electronic conductivity and dissolution of chemical species in the electrolyte, hinders use of these promising layered materials as SIB anodes. Herein we report chemical functionalization in MoS2 nanosheets with polymer-derived silicon oxycarbide or SiOC with the aim to preserve MoS2 from dissolution in the SIB organic electrolyte, without compromising its role in sodiation and desodiation processes. Our results suggest that a MoS2-SiOC composite electrode is effective in bringing improved cycle stability to sodium-ion cycling over neat MoS2 even after 100 cycles.
机译:提供稳定的循环性能的可行性,可扩展和环保电极材料的开发对于超越锂电电池和超级电容器的成功至关重要。 关于钠离子电池(SIB)阳极构成过渡金属二硫代甲基(如二硫化钼(MOS2),循环稳定性差和快速降解的较低,由于电解质中的化学物质的低电子导电性和化学物质的溶解,妨碍使用 这些有前途的分层材料作为SIB阳极。 在此我们在MOS2纳米蛋白酶中报告了具有聚合物衍生的氧化硅氧化硅或SIOC的化学官能化,其目的是将MOS2从SIB有机电解质中的溶解保持,而不会影响其在调解和退化过程中的作用。 我们的结果表明,即使在100次循环之后,MOS2-SIOC复合电极可有效地引起钠离子循环循环循环循环循环的循环稳定性。

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