2D interspace confined growth of ultrathin MoS_(2)-intercalated graphite hetero-layers for high-rate Li/K storage
作者机构：Department of Applied ChemistryUniversity of Science and Technology ofChinciy Hefei 230026China Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China College of Chemical EngineeringNingbo PolytechnicNingbo 315800China Ningbo Veken Battery Co.LtdNingbo 315800China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2021年第14卷第4期
页 面：1061-1068页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学]
基 金：the National Natural Science Foundation of China(Nos.21701163,21671181,21831006,22075268) Anhui Provincial Natural Science Foundation(No.1808085QB25)
主 题：interspace-confined MoS_(2)-intercalated graphite hetero-layers Li^(+)storage potassium ion battery
摘 要：Herein,a two-dimensional(2D)interspace-confined synthetic strategy is developed for producing MoS_(2)intercalated graphite(G-MoS_(2))hetero-layers composite through sulfuring the pre-synthesized stage-1 MoCI5-graphite intercalation compound(M0 CI5-GIC).The in situ grown MoS_(2)nanosheets(3-7 layers)are evenly encapsulated in graphite layers with intimate interface thus forming layer-by-layer MoS_(2)-intercalated graphite *** this structure,the unique merits of MoS_(2)and graphite components are integrated,such as high capacity contribution of MoS_(2)and the flexibility of graphite ***,the tight interfacial interaction between hetero-layers optimizes the potential of conductive graphite layers as matrix for MoS_(2).As a result,the G-MoS_(2)exhibits a high reversible Li+storage of 344 mAh·g^(-1)even at 10 A·g^(-1)and a capacity of 539.9 mAh·g^(-1)after 1,500 cycles at 5 A·g^(-1).As for potassium ion battery,G-MoS_(2)delivers a reversible capacity of 377.0 mAh·g^(-1)at 0.1 A·g^(-1)and 141.2 mAh·g^(-1)even at 2 A·g^(-1).Detailed experiments and density functional theory calculation demonstrate the existence of hetero-layers enhances the diffusion rates of Li^(+)and K^(+).This graphite interspace-confined synthetic methodology would provide new ideas for preparing function-integrated materials in energy storage and conversion,catalysis or other fields.
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