Hierarchical MoS<sub>2</sub>/Polyaniline Nanowires with Excellent Electrochemical Performance for Lithium‐Ion Batteries

Yang, Lichun; Wang, Sinong; Mao, J.; Deng, Junwen; Gao, Qingsheng; Tang, Yi; Schmidt, Oliver G.

doi:10.1002/adma.201203999

Cited by 591 publications

(405 citation statements)

References 42 publications

Supporting

Mentioning

390

Contrasting

Unclassified

Order By: Relevance

“…[20][21][22][23][24][25][26][27][28] Similar approaches involve mixing MoS2 with polyaniline nanowires 29 or carbon nanotubes. 19,[30][31][32] However, the composite electrodes described above remain far from optimised as LIB electrodes.…”

mentioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

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...

show abstract

mentioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

show abstract

“…28,31,32 However, controlling the synthesis of MoS 2 nanosheets as a cocatalyst remains a serious challenge, and most of the available 3D heterostructures are prepared by two or more steps. 17,28,33,34 Hence, developing a simple, controllable general approach to synthesize 3D MoS 2 -based heterostructures is of considerable interest for cocatalyst applications.…”

Section: Introductionmentioning

confidence: 99%

Layer-controlled growth of MoS2 on self-assembled flower-like Bi2S3 for enhanced photocatalysis under visible light irradiation

et al. 2016

View full text Add to dashboard Cite

Metal sulfide semiconductors, such as molybdenum disulfide (MoS 2 ) and bismuth trisulphide (Bi 2 S 3 ), are of considerable interest for their excellent applications in photocatalysis and in many other fields. However, the controllable synthesis of MoS 2 /Bi 2 S 3 hybrid nanostructures remains a challenge. In this study, we report a unique sacrificial templating strategy for preparing layer-controlled MoS 2 on three-dimensional (3D) Bi 2 S 3 micro-flowers. For this approach, Bi 2 S 3 was utilized as a sacrificial template to regulate the ion exchange, and the dosage of molybdenum was adjusted to tune the dynamic formation, thus converting the MoS 2 nanosheets on the Bi 2 S 3 micro-flowers from monolayer to multilayer. Such a 3D flower-like hybrid nanostructure enables MoS 2 /Bi 2 S 3 to exhibit adsorption-promoted photocatalysis under visible light irradiation, especially for the excellent photodegradation of low-concentration organic pollutants, for example, azo dye and atrazine. The observed superiority of the 3D MoS 2 /Bi 2 S 3 was mainly attributed to the increased mass transfer, robust light-harvesting capacity, improved charge separation, lower oxygen-activation barrier and enhanced active oxygen yield. Our findings are of interest for the development of novel S-based photocatalysts and provide a new opportunity to efficiently remove low-concentration refractory pollutants.

show abstract

“…MoS 2 , a kind of TMDs with the similar layered structure as graphite, allows reversible Li + intercalation/extraction and it possesses an ultrahigh theoretical specific capacity of 670 mA h g -1 (based on 4 mol of Li + insertion). It is usually much higher than that of graphene (usually in the range of 200 to 500 mA h g −1 ) [24,29], which makes MoS 2 the most popular next-generation materials in LIBs [20]. Chen et al [24] introduced Fe 3 O 4 nanoparticles into MoS 2 nanosheets to achieve superior electrochemical performance (Figs 1a and b).…”

Section: Lithium Ion Batteriesmentioning

confidence: 99%

“…Meanwhile, larger interlayer spacing, high theoretical specific capacity and power density make them very suitable in stretchable energy storage devices [16,17]. Induced by their excellent mechanical properties [18,19], the NB2DMs have been investigated in several flexible applications, such as batteries [20], SCs [21], photodetectors [22], etc.…”

Section: Introductionmentioning

confidence: 99%

Newborn 2D materials for flexible energy conversion and storage

et al. 2016

View full text Add to dashboard Cite

Newborntwo-dimensional materials (NB2DMs) beyond graphene such as transition metal dichalcogenides (TMDs) exhibit excellent optoelectronic and mechanical properties as well as high theoretical specific capacity, which make them become the promising building blocks of flexible energy devices related to energy conversion and storage. Compared to graphene with zero band gap or traditional friable materials such as Si, these NB2DMs are more suitable to construct flexible devices as active layers of optoelectronic devices or as active materials for batteries. The present review focuses on the recent advances in bendable energy devices based on NB2DMs, including batteries, supercapacitors (SCs), solar cells, photodetectors and nanogenerators (NGs). The NB2DMs pave a new way to construct next-generation flexible energy devices with improved performance and we believe that those devices will be seen in our daily life and change our lifestyle in the immediate future.

show abstract

Hierarchical MoS₂/Polyaniline Nanowires with Excellent Electrochemical Performance for Lithium‐Ion Batteries

Cited by 591 publications

References 42 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

Layer-controlled growth of MoS2 on self-assembled flower-like Bi2S3 for enhanced photocatalysis under visible light irradiation

Newborn 2D materials for flexible energy conversion and storage

Contact Info

Product

Resources

About

Hierarchical MoS2/Polyaniline Nanowires with Excellent Electrochemical Performance for Lithium‐Ion Batteries

Cited by 591 publications

References 42 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

Layer-controlled growth of MoS2 on self-assembled flower-like Bi2S3 for enhanced photocatalysis under visible light irradiation

Newborn 2D materials for flexible energy conversion and storage

Contact Info

Product

Resources

About

Hierarchical MoS₂/Polyaniline Nanowires with Excellent Electrochemical Performance for Lithium‐Ion Batteries

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