Lithium ion battery applications of molybdenum disulfide (MoS<sub>2</sub>) nanocomposites

Stephenson, Tyler; Li, Zhi; Olsen, Brian C.; Mitlin, David

doi:10.1039/c3ee42591f

Cited by 1,253 publications

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References 268 publications

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“…Subsequently, the original layered structure cannot be recovered. 7 The different shapes of the initial discharge curve and 10th or 50th discharge curve are reflective of this permanent structural change (as well as the formation of an SEI layer).Most importantly, we found that MoS2 nanosheet electrodes suffer from poor cycling stability. For example, at the specific current of 0.1 A/g, its discharge capacity initiates at >500 mAh/g, but gradually drops to 190 mAh/g over 50 cycles (Fig.…”

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confidence: 71%

“…While a range of materials, including silicon, have been envisaged as future LIB anode materials, 4 of particular interest are 2-dimensional (2D) nanomaterials 5 such as graphene 6 and MoS2. 7 Over the last decade, 2D nano-materials have generated much excitement in the nanomaterials science community. [8][9][10] They come in many types including graphene, transition metal dichalcogenides (TMDs) and transition metal oxides (TMOs).…”

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confidence: 99%

“…7,18,19 One common approach has been the production of composites of MoS2 and a conductive additive with the aim of enhancing the rate capability.…”

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Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS₂/Nanotube Composite Lithium Ion Battery Electrodes

et al. 2016

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Advances in lithium ion batteries would facilitate technological developments inareas from electrical vehicles to mobile communications. While 2-dimensional systems like MoS2 are promising electrode materials due to their potentially high capacity, their poor ratecapability and low cycle-stability are severe handicaps. Here we study the electrical, mechanical and lithium storage properties of solution-processed MoS2/carbon nanotube anodes.Nanotube addition gives up to ×10 10 and ×40 increases in electrical conductivity and mechanical toughness respectively. The increased conductivity results in up to a ×100 capacity enhancement to ~1200 mAh/g (~3000 mAh/cm 3 ) at 0.1 A/g, while the improved toughness significantly boosts cycle stability. Composites with 20 wt% nanotubes combined high reversible capacity with excellent cycling stability (e.g. ~950 mAh/g after 500 cycles at 2 A/g) and high-rate capability (~600 mAh/g at 20 A/g). The conductivity, toughness and capacity scaled with nanotube content according to percolation theory while the stability increased sharply at the mechanical percolation threshold. We believe the improvements in conductivity and toughness obtained after addition of nanotubes can be transferred to other electrode materials such as silicon nanoparticles.Keywords: percolating, network, anode, mechanical 2 In recent years, lithium ion batteries (LIBs) have become the most common rechargeable power sources for portable electronic devices and electric vehicles. 1, 2 Nevertheless, they still suffer from several problems; their energy and especially power densities have not fulfilled their ultimate potential while their safety record is not unblemished. 3 A significant problem is that graphite, the dominant anode material used in LIBs, is limited by a relatively low theoretical capacity of 372 mAh/g. 4 As such, the development of the next-generation of LIBs, is expected to see the replacement of graphite-based anodes with alternative materials having higher capacity at similarly low cost. While a range of materials, including silicon, have been envisaged as future LIB anode materials, 4 of particular interest are 2-dimensional (2D) nanomaterials 5 such as graphene 6 and MoS2. 7 Over the last decade, 2D nano-materials have generated much excitement in the nanomaterials science community. [8][9][10] They come in many types including graphene, transition metal dichalcogenides (TMDs) and transition metal oxides (TMOs). These materials consist of covalently bonded monolayers which can stack via van der Waals interactions to form layered crystals. 8,9 Such 2D nanomaterials are often found as nanosheets with lateral size ranging from 10s of nm to microns and thickness of ~nm. 9 These materials have shown potential for applications 5 in both energy generation 11 and storage. 12 In the context of LIBs, exfoliated TMDs have received significant attention as prospective anode materials. 13,14 While bulk MoS2 was proposed 15 as a Li ion battery electrode material as early as 1980 due to its hi...

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Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS₂/Nanotube Composite Lithium Ion Battery Electrodes

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“…11 The stable structure of MoS 2 thus prevents the common pulverization problem observed in charge storage devices. 12 Nevertheless, the drawbacks of large irreversible capacity in the first cycle, fast capacity fading and inferior rate capability have thus far impeded the widespread application of MoS 2 -based anodes of LIBs. 8 MoS 2 has also received increasing interest as the catalyst in hydrogen evolution reaction (HER) owing to its chemical stability, relatively low cost and high photocatalytic/electrocatalytic property.…”

Section: Introductionmentioning

confidence: 99%

“…14 To resolve these issues, various carbonaceous materials, including carbon nanotubes, activated carbon and graphene, have been employed to support the MoS 2 nanostructures. 6,12 These conductive hosts not only improve electronic conductivity but also reduce lithium-ion diffusion length and increase the electrochemical and electrocatalytic efficiency of the MoS 2 nanostructure. 12 For example, MoS 2 /graphene nanocomposites, 15 hierarchical MoS x /carbon nanotube nanocomposites, 1 MoS 2 /three-dimensional graphene (3D) networks, 16 and honeycomb-like MoS 2 on 3D graphene foam were reported to have a high reversible capacity and long cycle stability for LIBs.…”

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confidence: 99%

MoS2-coated vertical graphene nanosheet for high-performance rechargeable lithium-ion batteries and hydrogen production

et al. 2016

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Hybrid nanostructures composed of vertical graphene nanosheet (VGNS) and MoS 2 nano-leaves are synthesized by the chemical vapor deposition method followed by a solvothermal process. The unique three-dimensional nanostructures of MoS 2 /VGNS arranged in a vertically aligned manner can be easily constructed on various substrates, including Ni foam and graphite paper. Compared with MoS 2 /carbon black, MoS 2 /VGNS nanocomposites grown on Ni foam exhibit enhanced electrochemical performance as the anode material of lithium-ion batteries, delivering a specific capacity of 1277 mAh g − 1 at a current density of 100 mA g − 1 and a high first-cycle coulombic efficiency of 76.6%. Moreover, the MoS 2 /VGNS nanostructures also retain a capacity of 1109 mAh g − 1 after 100 cycles at a current density of 200 mA g − 1 , suggesting excellent cycling stability. In addition, when the MoS 2 /VGNS nanocomposites grown on graphite paper are applied in the hydrogen evolution reaction, a small Tafel slope of 41.3 mV dec − 1 and a large double-layer capacitance of 7.96 mF cm − 2 are obtained, which are among the best values achievable by MoS 2 -based hybrid structures. These results demonstrate the potential applications of MoS 2 /VGNS hybrid materials for energy conversion and storage and may open up a new avenue for the development of vertically aligned, multifunctional nanoarchitectures.

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Mo‐Based Anode Materials for Alkali Metal Ion Batteries

Guan

Zhao

et al. 2019

Advanced Battery Materials

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Lithium ion battery applications of molybdenum disulfide (MoS₂) nanocomposites

Cited by 1,253 publications

References 268 publications

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS₂/Nanotube Composite Lithium Ion Battery Electrodes

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS₂/Nanotube Composite Lithium Ion Battery Electrodes

MoS2-coated vertical graphene nanosheet for high-performance rechargeable lithium-ion batteries and hydrogen production

Mo‐Based Anode Materials for Alkali Metal Ion Batteries

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Lithium ion battery applications of molybdenum disulfide (MoS2) nanocomposites

Cited by 1,253 publications

References 268 publications

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS2/Nanotube Composite Lithium Ion Battery Electrodes

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS2/Nanotube Composite Lithium Ion Battery Electrodes

MoS2-coated vertical graphene nanosheet for high-performance rechargeable lithium-ion batteries and hydrogen production

Mo‐Based Anode Materials for Alkali Metal Ion Batteries

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Lithium ion battery applications of molybdenum disulfide (MoS₂) nanocomposites

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS₂/Nanotube Composite Lithium Ion Battery Electrodes

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS₂/Nanotube Composite Lithium Ion Battery Electrodes