Penne‐Like MoS₂/Carbon Nanocomposite as Anode for Sodium‐Ion‐Based Dual‐Ion Battery

Abstract

The dual-ion battery (DIB) system has attracted great attention owing to its merits of low cost, high energy, and environmental friendliness. However, the DIBs based on sodium-ion electrolytes are seldom reported due to the lack of appropriate anode materials for reversible Na insertion/extraction. Herein, a new sodium-ion based DIB named as MoS /C-G DIB using penne-like MoS /C nanotube as anode and expanded graphite as cathode is constructed and optimized for the first time. The hierarchical MoS /C nanotube provides expanded (002) interlayer spacing of 2H-MoS , which facilitates fast Na insertion/extraction reaction kinetics, thus contributing to improved DIB performance. The MoS /C-G DIB delivers a reversible capacity of 65 mA h g at 2 C in the voltage window of 1.0-4.0 V, with good cycling performance for 200 cycles and 85% capacity retention, indicating the feasibility of potential applications for sodium-ion based DIBs.

Strategies towards Low‐Cost Dual‐Ion Batteries with High Performance

“…As discussed above, the coated carbon layer exhibits good conductivity, which is helpful to reduce the charge transfer resistance. Zhu et al . developed a so‐called “penne‐like” MoS 2 /C nanocomposite as anode for Na‐ion based DIB.…”

Sodium‐Ion Hybrid Battery Combining an Anion‐Intercalation Cathode with an Adsorption‐Type Anode for Enhanced Rate and Cycling Performance

“…Exploiting rechargeable battery technologies with enhanced performance as well as low cost and environmental friendliness has become a global and urgent demand since the explosive growth of portable electronic devices, electric vehicles as well as large‐scale energy storage . Meanwhile, the limited and uneven distribution of lithium resource has stimulated extensive investigations of energy storage devices based on other abundant metal ions, such as Na + , K + , Al 3+ ,, etc. Among them, sodium‐ion batteries (SIBs) have attracted increased attention owing to the merits of low potential (−2.71 V vs. standard hydrogen electrode (SHE)), high natural abundance, low cost, and similar electrochemical properties to lithium .…”

“…Nevertheless, the larger size of Na + (0.98 Å) than Li + (0.69 Å) results in sluggish diffusion kinetics and the following unsatisfied rate capability and cycling performance. While many efforts have been focused on designing appropriate electrode cathode or anode materials with optimized structures to solve the above issues, new battery construction design could also be another suitable strategy.…”

Strategien für kostengünstige und leistungsstarke Dual‐Ionen‐Batterien

“…Aus Lit. mit Genehmigung von Wiley‐VCH, Copyright 2018. g) SEM‐ und h) TEM‐Aufnahmen von (MoS 2 /F)@MoS 2 @C, i) Detail eines HRTEM‐Bilds und schematische Darstellung von (MoS 2 /F)@MoS 2 @C. Aus Lit. mit Genehmigung von Elsevier, Copyright 2018.…”