TY - JOUR
T1 - Dual-phase MoS2 as a high-performance sodium-ion battery anode
AU - Wu, Junxiong
AU - Liu, Jiapeng
AU - Cui, Jiang
AU - Yao, Shanshan
AU - Ihsan-Ul-Haq, Muhammad
AU - Mubarak, Nauman
AU - Quattrocchi, Emanuele
AU - Ciucci, Francesco
AU - Kim, Jang Kyo
N1 - Funding Information:
This project was nancially supported by the Research Grants Council (GRF Projects: 16207615, 16227016, 16204517, and 16208718) and the Innovation and Technology Commission (ITF projects ITS/001/17 and ITS/292/18FP) of Hong Kong SAR as well as the Guangzhou Science and Technology Program (No. 201807010074). The authors also appreciate the technical assistance from the Advanced Engineering Materials facilities (AEMF) and the Materials Characterization and Preparation Facilities (MCPF) of HKUST.
Publisher Copyright:
This journal is © The Royal Society of Chemistry.
PY - 2020
Y1 - 2020
N2 - The increasing cost and limited availability of lithium have prompted the development of high-performance sodium-ion batteries (SIBs) as a potential alternative to lithium-ion batteries. However, it has been a critical challenge to develop high-performance anode materials capable of storing and transporting Na+ efficiently. Amongst the various options, MoS2 has significant advantages including low cost, and a high theoretical capacity of ∼670 mA h g-1. Nevertheless, MoS2 has several issues: its electronic conductivity is low and its structure deteriorates rapidly during charge/discharge cycles, leading to a poor electrochemical performance. Here, a dual-phase MoS2 (DP-MoS2) is synthesized by combining two distinct 1T (trigonal) and 2H (hexagonal) phases to solve these challenges. Compared to the conventional 2H-MoS2 counterpart, the DP-MoS2 phase material presents a highly reversible Na+ intercalation/extraction process aided by expanded interlayer spacing along with much higher electronic conductivity and Na ion affinity. Consequently, the DP-MoS2 electrode delivers a high cyclic stability with a reversible capacity of 300 mA h g-1 after 200 cycles at 0.5 A g-1 and an excellent rate capability of ∼220 mA h g-1 at 2 A g-1. The SIBs assembled with DP-MoS2 and Na3V2(PO4)3 as the negative and positive electrodes, respectively, have a specific capacity of 210 mA h g-1 (based on the mass of DP-MoS2) at 0.5 A g-1. This performance demonstrates that DP-MoS2 has a significant potential in commercial devices. This work offers a new approach to develop metal chalcogenides for electrochemical energy storage applications.
AB - The increasing cost and limited availability of lithium have prompted the development of high-performance sodium-ion batteries (SIBs) as a potential alternative to lithium-ion batteries. However, it has been a critical challenge to develop high-performance anode materials capable of storing and transporting Na+ efficiently. Amongst the various options, MoS2 has significant advantages including low cost, and a high theoretical capacity of ∼670 mA h g-1. Nevertheless, MoS2 has several issues: its electronic conductivity is low and its structure deteriorates rapidly during charge/discharge cycles, leading to a poor electrochemical performance. Here, a dual-phase MoS2 (DP-MoS2) is synthesized by combining two distinct 1T (trigonal) and 2H (hexagonal) phases to solve these challenges. Compared to the conventional 2H-MoS2 counterpart, the DP-MoS2 phase material presents a highly reversible Na+ intercalation/extraction process aided by expanded interlayer spacing along with much higher electronic conductivity and Na ion affinity. Consequently, the DP-MoS2 electrode delivers a high cyclic stability with a reversible capacity of 300 mA h g-1 after 200 cycles at 0.5 A g-1 and an excellent rate capability of ∼220 mA h g-1 at 2 A g-1. The SIBs assembled with DP-MoS2 and Na3V2(PO4)3 as the negative and positive electrodes, respectively, have a specific capacity of 210 mA h g-1 (based on the mass of DP-MoS2) at 0.5 A g-1. This performance demonstrates that DP-MoS2 has a significant potential in commercial devices. This work offers a new approach to develop metal chalcogenides for electrochemical energy storage applications.
UR - http://www.scopus.com/inward/record.url?scp=85078662087&partnerID=8YFLogxK
U2 - 10.1039/c9ta11913b
DO - 10.1039/c9ta11913b
M3 - Article
AN - SCOPUS:85078662087
SN - 2050-7488
VL - 8
SP - 2114
EP - 2122
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 4
ER -