现代化工

现代化工 ›› 2020, Vol. 40 ›› Issue (4) : 158-162,166. DOI: 10.16606/j.cnki.issn0253-4320.2020.04.034

科研与开发

二硫化钼/石墨烯复合电极的制备及其电化学储钠性能研究

王彩虹, 张永锋

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Synthesis of MoS₂/RGO composite electrode and study on its electrochemical performance for sodium storage

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Received		Published
2019-06-20		2020-04-20
Issue Date	Revised Date
2020-04-17	2019-06-20

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摘要

二硫化钼（MoS₂）是一种稳定、安全、廉价的钠离子电池负极材料，但是二硫化钼的本征电导率较低，限制了钠离子电池的比容量和倍率性能。利用一步水热法制备了二硫化钼和还原石墨烯（MoS₂/RGO）复合体系，并用于钠离子电池负极材料中。还原石墨烯不仅能增强复合材料的导电性，而且能够提高MoS₂的结构稳定性，从而提升钠离子电池的比容量和循环稳定性。电化学测试结果表明，在1 A/g的电流密度下循环250次后，MoS₂/RGO复合电极的比容量仍然高达509 mA·h/g。

Abstract

Molybdenum disulfide (MoS₂) represents a stable,safe,and low-cost anode material for sodium-ion batteries (SIBs),which has great application prospects.However,the specific capacity and rate capability of SIBs are limited due to low intrinsic electrical conductivity of molybdenum disulfide.MoS₂/RGO composite is synthesized by a novel one-step hydrothermal method and is used as anode material for SIBs.Furthermore,RGO can enhance the electrical conductivity of the composite and improve the structural stability of MoS₂,thus improving specific capacity and cycle stability of SIBs.Electrochemical tests suggest that the specific capacity of MoS₂/RGO composite electrode has maintained as high as 509 mA·h·g^-1 after 250 cycles at 1 A·g^-1.