University of Wollongong Research Online Australian Institute for Innovative Materials - Papers Australian Institute for Innovative Materials 1-1-2020 Tuning Interface Bridging Between MoSe2 and Three-Dimensional Carbon Framework by Incorporation of MoC Intermediate to Boost Lithium Storage Capability Jing Chen Yilin Luo Wenchao Zhang University of Wollongong, [email protected] Yun Qiao Xinxin Cao See next page for additional authors Follow this and additional works at: https://ro.uow.edu.au/aiimpapers Part of the Engineering Commons, and the Physical Sciences and Mathematics Commons Recommended Citation Chen, Jing; Luo, Yilin; Zhang, Wenchao; Qiao, Yun; Cao, Xinxin; Xie, Xuefang; Zhou, Haoshen; Pan, Anqiang; and Liang, Shuquan, "Tuning Interface Bridging Between MoSe2 and Three-Dimensional Carbon Framework by Incorporation of MoC Intermediate to Boost Lithium Storage Capability" (2020). Australian Institute for Innovative Materials - Papers. 4288. https://ro.uow.edu.au/aiimpapers/4288 Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library: [email protected] Tuning Interface Bridging Between MoSe2 and Three-Dimensional Carbon Framework by Incorporation of MoC Intermediate to Boost Lithium Storage Capability Abstract © 2020, The Author(s). Highlights: MoSe2/MoC/C multiphase boundaries boost ionic transfer kinetics.MoSe2 (5–10 nm) with rich edge sites is uniformly coated in N-doped framework.The obtained MoSe2 nanodots achieved ultralong cycle performance in LIBs and high capacity retention in full cell. Abstract: Interface engineering has been widely explored to improve the electrochemical performances of composite electrodes, which governs the interface charge transfer, electron transportation, and structural stability. Herein, MoC is incorporated into MoSe2/C composite as an intermediate phase to alter the bridging between MoSe2- and nitrogen-doped three-dimensional (3D) carbon framework as MoSe2/MoC/ N–C connection, which greatly improve the structural stability, electronic conductivity, and interfacial charge transfer. Moreover, the incorporation of MoC into the composites inhibits the overgrowth of MoSe2 nanosheets on the 3D carbon framework, producing much smaller MoSe2 nanodots. The obtained MoSe2 nanodots with fewer layers, rich edge sites, and heteroatom doping ensure the good kinetics to promote pseudo-capacitance contributions. Employing as anode material for lithium-ion batteries, it shows ultralong cycle life (with 90% capacity retention after 5000 cycles at 2 A g−1) and excellent rate capability. Moreover, the constructed LiFePO4//MoSe2/MoC/N–C full cell exhibits over 86% capacity retention at 2 A g−1 after 300 cycles. The results demonstrate the effectiveness of the interface engineering by incorporation of MoC as interface bridging intermediate to boost the lithium storage capability, which can be extended as a potential general strategy for the interface engineering of composite materials.[Figure not available: see fulltext.] Disciplines Engineering | Physical Sciences and Mathematics Publication Details Chen, J., Luo, Y., Zhang, W., Qiao, Y., Cao, X., Xie, X., Zhou, H., Pan, A. & Liang, S. (2020). Tuning Interface Bridging Between MoSe2 and Three-Dimensional Carbon Framework by Incorporation of MoC Intermediate to Boost Lithium Storage Capability. Nano-Micro Letters, 12 (1), Authors Jing Chen, Yilin Luo, Wenchao Zhang, Yun Qiao, Xinxin Cao, Xuefang Xie, Haoshen Zhou, Anqiang Pan, and Shuquan Liang This journal article is available at Research Online: https://ro.uow.edu.au/aiimpapers/4288 ISSN 2311‑6706 e‑ISSN 2150‑5551 CN 31‑2103/TB ARTICLE https://doi.org/10.1007/s40820‑020‑00511‑4 Tuning Interface Bridging Between MoSe2 and Three‑Dimensional Carbon Framework Cite as Nano‑Micro Lett. by Incorporation of MoC Intermediate to Boost (2020) 12:171 Lithium Storage Capability Received: 19 May 2020 Accepted: 3 August 2020 1 1 3 2 1 1 © The Author(s) 2020 Jing Chen , Yilin Luo , Wenchao Zhang , Yu Qiao , Xinxin Cao , Xuefang Xie , * * Haoshen Zhou2, Anqiang Pan1,4 , Shuquan Liang1 * Anqiang Pan, [email protected]; Shuquan Liang, [email protected] 1 School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, People’s Republic of China 2 Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology, 1‑1‑1, Umezono, Tsukuba 305‑8568, Japan 3 Institute for Superconducting and Electronic Materials, School of Mechanical, Materials, Mechatronics and Biomedical Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2500, Australia 4 Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, People’s Republic of China HIGHLIGHTS • MoSe2/MoC/C multiphase boundaries boost ionic transfer kinetics. • MoSe2 (5–10 nm) with rich edge sites is uniformly coated in N‑doped framework. • The obtained MoSe2 nanodots achieved ultralong cycle performance in LIBs and high capacity retention in full cell. ABSTRACT Interface engineering has been widely explored to LIBs based on MoSe2/MoC/N-C MoC bridge MoSe2 and N-doped Carbon Li+ Li+ Li+ improve the electrochemical performances of composite electrodes, Discharge Charge + − which governs the interface charge transfer, electron transportation, and d(002) MoSe2 structural stability. Herein, MoC is incorporated into MoSe2/C compos‑ Li+ Li+ ite as an intermediate phase to alter the bridging between MoSe 2‑ and MoC nitrogen‑doped three‑dimensional (3D) carbon framework as MoSe / N-C 2 LiFePO4 MoSe2/MoC/N-C e− e− e− MoC/N–C connection, which greatly improve the structural stability, Mo Se N C electronic conductivity, and interfacial charge transfer. Moreover, the incorporation of MoC into the composites inhibits the overgrowth of MoSe2 nanosheets on the 3D carbon framework, producing much smaller MoSe2 nanodots. The obtained MoSe 2 nanodots with fewer layers, rich edge sites, and heteroatom doping ensure the good kinetics to promote pseudo‑capacitance contributions. Employing as anode material for lithium‑ion batteries, it shows ultralong cycle life (with 90% −1 capacity retention after 5000 cycles at 2 A g ) and excellent rate capability. Moreover, the constructed LiFePO 4//MoSe2/MoC/N–C full cell exhibits over 86% capacity retention at 2 A g−1 after 300 cycles. The results demonstrate the efectiveness of the interface engineering by incorporation of MoC as interface bridging intermediate to boost the lithium storage capability, which can be extended as a potential general strategy for the interface engineering of composite materials. KEYWORDS Interface engineering; Porous carbon framework; MoSe2 nanodots; MoC; Heterostructure; Battery Vol.:(0123456789) 1 3 171 Page 2 of 13 Nano‑Micro Lett. (2020) 12:171 1 Introduction Interface engineering can introduce distortions, disloca‑ tions, and lattice defects, with distinguished electronic struc‑ Transition metal dichalcogenide (TMD) materials MX2 tures, which are long‑range disorder and, hence, can lower the (M = transition metal; X = chalcogen) with lamellar struc‑ activation barrier, thus boosting reaction kinetics [5, 26, 27]. ture have received broad attentions in the felds of batteries, More recently, through interface coupling by chemical bonds, supercapacitors, catalysts, and sensors due to their large layer previous theoretical calculation and practical experiments both distance and high surface area [1–6]. Among them, transition have revealed that Mo–O–C or Mo–C bonds between carbon metal selenides (MSe2) have higher conductivity than the cor‑ and MoSe2 can efectively enhance electronic conductivity and responding sulfdes (MS 2) and oxides (MO 2). Moreover, the structure stability through the interface [28, 29]. However, the bond strength of M–Se is weaker than M–S or M–O, which portion of the chemical bonding between the active material is kinetically favorable for conversion reactions [7, 8]. Spe‑ and substrate is still too limited to stabilize structure. There‑ cifcally, molybdenum diselenide (MoSe2) possesses large fore, it is highly expected to increase the chemical bonds at the interlayer distance (0.65 nm, two times larger than that of interface or develop new strategy to improve the stability of commercial graphite) because of weak van der Waals forces composites, in particular for long‑term cycling applications. and relatively high electronic conductivity (1 × 10−3 S m −1) Introducing intermediate material to bridge the active material triggered from the narrow band gap (1.1 eV) [9–11], making it and the substrate presents to be a wise choice. Comparing to a promising electrode material for lithium‑ion batteries (LIBs). MoSe2, MoC owns intrinsic higher electrical conductivity and However, MoSe2 electrode still sufers from large volume vari‑ chemical stability [30–32]. The structural stability and charge ations, inherently low conductivity, and adverse reaction dur‑ transportation will be greatly improved by the incorporation ing cycling, which leads to severe capacity fading and inferior of MoC into the composite, which bridges MoSe 2 and carbon rate performance [8, 12–15]. substrates by MoSe2–MoC–carbon connection. To address aforementioned concerns, great eforts have been Herein, we reported the temperature‑induced one‑step focused on nano‑/microstructure design and carbon modifca‑ incorporation of MoC as an intermediate phase to bridge tion. In general, nanosized