title: Carbon-Stabilized Interlayer-Expanded Few-Layer MoSe2Nanosheets for Sodium Ion Batteries with Enhanced Rate Capability and Cycling Performance.
abstract: Sodium ion batteries (SIBs) have been considered as a promising alternative to lithium ion batteries, owing to the abundant reserve and low-cost accessibility of the sodium source. To date, the pursuit of high-performance anode materials remains a great challenge for the SIBs. In this work, carbon-stabilized interlayer-expanded few-layer MoSe2nanosheets (MoSe2@C) have been fabricated by an oleic acid (OA) functionalized synthesis-polydopamine (PDA) stabilization-carbonization strategy, and their structural, morphological, and electrochemical properties have been carefully characterized and compared with the carbon-free MoSe2. When evaluated as anode for sodium ion half batteries, the MoSe2@C exhibits a remarkably enhanced rate capability of 367 mA h g-1at 5 A g-1, a high reversible discharge capacity of 445 mA h g-1at 1 A g-1, and a long-term cycling stability over 100 cycles. To further explore the potential applications, the MoSe2@C is assembled into sodium ion full batteries with Na3V2(PO4)3(NVP) as cathode materials, showing an impressively high reversible capacity of 421 mA h g-1at 0.2 A g-1after 100 cycles. Such results are primarily attributed to the unique carbon-stabilized interlayer-expanded few-layer MoSe2nanosheets structure, which facilitates the permeation of electrolyte into the inner of MoSe2nanosheets, promoting charge transfer efficiency among MoSe2nanosheets, and accommodating the volume change from discharge-charge cycling.
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Yongchao
authors.initials: Y
authors.lastname: Tang
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Zongbin
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Yuwei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Dong
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Xuzhen
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology , Dalian116024, P. R. China.
authors.forename: Jieshan
authors.initials: J
authors.lastname: Qiu
keywords: carbon stabilization; expanded interlayer spacing; few-layer MoSe2 nanosheets; oleic acid functionalization; sodium ion batteries