A nanocomposite of MoO3 coated with PPy as an anode material for aqueous sodium rechargeable batteries with excellent electrochemical performance

Liu, Y.; Zhang, B.H.; Xiao, S.Y.; Liu, L.L.; Wen, Zubiao; Wu, Yuping

doi:10.1016/j.electacta.2013.11.077

Cited by 123 publications

(53 citation statements)

References 44 publications

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“…Liu et al showed that coating α-MoO 3 with polypyrrole vastly improved the cycling stability of the material by preventing the dissolution of molybdenum ions. 27,31 In addition, although the PPy coating would be expected to be in the neutral state at the redox potentials of α-MoO 3 and thusly provide no enhancement of electronic conductivity, a decrease in charge transfer resistance was reported but no potential mechanism was offered. Similarly, Tang et al showed that coating a composite of V 2 O 5 and multiwalled carbon nanotubes with polypyrrole improved the cycling performance of the material by preventing the dissolution of vanadium ions.…”

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confidence: 99%

“…One method that has proven useful in the stabilization of aqueous electrode materials is the coating of active material with an electronically conducting or functionalized/conjugated polymer material that is stable in the electrolyte and will serve to protect the active material. 14,27,[31][32][33] Conjugated polymers are linear molecules with partially filled valence or conduction bands. Often based on a series of alternating double and single bonds, which leads to a network of sp 2 -hybridized bonds with the pz-orbitals of the carbon atoms overlapping, leading to the delocalization of charge carriers along the backbone of the polymer chain.…”

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Using Polypyrrole Coating to Improve Cycling Stability of NaTi₂(PO₄)₃as an Aqueous Na-Ion Anode

Mohamed

Sansone

Kuei

et al. 2015

J. Electrochem. Soc.

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Aqueous alkali -ion batteries offer an economical method for large-scale energy storage demanded by current sources of renewable energy. Although NASICON-type NaTi 2 (PO 4 ) 3 is an attractive anode material with high capacity and a low redox potential allowing for high voltage cells, it suffers from considerable capacity fade when cycled slowly and deeply. In this work polypyrrole has been introduced as a coating for NaTi 2 (PO 4 ) 3 through a high-energy ballmilling process. When an excessive coating was applied, no redox reactions from the NaTi 2 (PO 4 ) 3 were visible due to the poor Na + diffusion through the polypyrrole. However, the as-coated composites containing 5 wt% polypyrrole showed much better capacity retention compared to the uncoated material, retaining 57% of the initial discharge capacity after 50 cycles compared to the uncoated material, which retained only 10% of the initial discharge capacity. It is concluded that coating NaTi 2 (PO 4 ) 3 with conducting polymers can be an effective strategy for promoting battery lifetime. Large-scale energy storage is needed for the deployment of gridtied and distributed renewable energy sources such as solar installations and wind farms, which rely on power generation that is inherently intermittent. For this kind of storage, the single most important performance attribute is the amortized cost of stored electricity over the life of the energy storage device; as such long life and robustness through thousands of use cycles are critical attributes.1,2 As such, we have sought to develop low cost, easy to manufacture battery chemistries that are composed of benign materials and have the necessary long-term stability. Neutral pH aqueous based battery systems are well suited for this purpose. The higher conductivity of aqueous electrolytes allows for thicker electrodes, low cost electrolyte salts such as Li 2 SO 4 and Na 2 SO 4 can be used in place of LiPF 6 , and nonwoven cellulose separators can be used in place of more expensive porous polyolefins. ,9-11,15,19-27 as anode materials. While a significant amount of research has been carried out on the failure mechanism of cathode materials, little has been done to elucidate the anode material role in battery failure in aqueous electrolytes. Furthermore, there are some cathode systems that have exhibited many thousands of stable cycles without loss in function, 8,28 while materials at useful anode potentials tend to lose function rapidly. 23,29 Of particular interest are the sodium super ionic conductor (NA-SICON) titanium phosphates due to their high ionic conductivities, relative low cost of production, and chemical stability. 11,24,25 In particular, NaTi 2 (PO 4 ) 3 with a theoretical capacity of 133 mAh/g and the ability to replace lithium salts with sodium equivalents should offer a cost-effective alternative to the lithium equivalent. However, this material commonly exhibits significant capacity fade, especially when cycled deeply/slowly, and the phenomena responsible for this loss in function remains p...

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Using Polypyrrole Coating to Improve Cycling Stability of NaTi₂(PO₄)₃as an Aqueous Na-Ion Anode

Mohamed

Sansone

Kuei

et al. 2015

J. Electrochem. Soc.

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“…[55,58,68,84,88] For example, to overcomep oor electronic conductivitya nd huge areal expansion, Sreedhara et al prepared ultrathinM oO 3 nanosheets throught he directo xidationo f few-layered MoS 2 . [92] Upon assembly with the Na 0.35 MnO 2 cathode, the full cell delivers an energy density of 20 Wh kg À1 at 80 Wkg À1 and 18 Wh kg À1 at 2.6 kW kg À1 in a 0.5 m aqueous solution of Na 2 SO 4 ,t hus revealing excellent rate performance similar to that of supercapacitors. In addition, an exfoliated a-MoO 3 composite with rGO deliversaspecific capacity of 0.75 Ah g À1 with full cycling stabilityo ver 100 cycles.…”

Section: Molybdenum Oxides For Sibsmentioning

confidence: 98%

Recent Progress on Molybdenum Oxides for Rechargeable Batteries

et al. 2019

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bility during the reaction, andl ow electronic conductivity (ca. 10 À5 Scm À1 ). [28,29] Reduced molybdenum oxides,i ncluding MoO 2 and MoO x (2 < x < 3), with intrinsic oxygen vacancies, comparedwith pure MoO 3 ,can greatly increase the conductivity,a nd have been studied as attractive electrode materials. [30,31] Unfortunately,a s-fabricated batteries based on MoO 2 or MoO x electrodes still suffer from poor cycling stability and low recharge efficiency.T herefore, much effort has been invested over the past few years to pursuet he high energy efficiency, high cycling stability,a nd prominentr ate capability of molybdenum oxide-based electrodes for rechargeable batteries.Herein, we presentabrief summary of recent progress in the use of molybdenum oxides, including MoO 3 and MoO 2 ,a s well their composites, as electrodes for rechargeable batteries, such as LIBs, SIBs, Li-S batteries, Li-O 2 batteries, and other novel battery systems. The charge-storage mechanisms, fabrication of the electrode structures, and electrochemical performances, combined with their relationships, are mainlyd iscussed. This Minireview focuseso nc urrently developed strategies to improvet he energy-storage performances of the electrodes, through morphology modification,d efect engineering, and synergistic effects of hybrid electrodes, and thus, to optimize the electrochemical properties of the batteries. Finally, perspectives on MoO 3 -a nd MoO 2 -based compounds for the future development of rechargeable batteries are also presented.

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“…[5][6][7][8] In the past few years, variousmaterials have been investigated as anode materials for SIBs, including hard carbon, [9,10] alloybased materials, [11,12] oxides, [13,14] sulfides, [15,16] selenides [17,18] and phosphides. [19,20] Particularly,l ots of metal oxides have been reported to have sodium storagep roperties, such as Fe 2 O 3 , [21] Co 3 O 4 , [22] TiO 2 , [23] MoO 3 [24] and SnO 2 , [25] which provide us some information about electrochemical reactionm echanism of metal oxides and their possibility to be used as anodes for SIBs. As at ransition metal oxide, manganese dioxideh as been extensively investigated as supercapacitor electrode and ap romising potential anode material for LIBs due to its high theoretical lithium storage capacity (1230mAhg À1 ), low operating voltage and natural abundance.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Nanostructured MnO₂ as Anode Materials for Sodium‐Ion Batteries

Zhang

Zhao

2016

ChemNanoMat

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Nanostructured MnO2 (including nanorods and nanoflowers) has been synthesized by a simple two‐step hydrothermal method and thermal treatment. When employed as anode materials for sodium‐ion batteries, MnO2 nanorods and nanoflowers demonstrate high initial sodium ion storage capacities of 427.4 and 487.8 mA h g−1, respectively, at a current density of 50 mA g−1. Compared with MnO2 nanorods, MnO2 nanoflowers achieved a much better electrochemical performance including good rate capability (103.3 mA h g−1 at 800 mA g−1 after 100 cycles) and superior cyclability (133.6 mA h g−1 at 400 mA g−1 after 1000 cycles). The good performance can be ascribed to the nanocrystalline nature and the three‐dimensional hierarchical architecture of MnO2 nanoflowers, which promotes the contact between MnO2 and electrolyte and shortens the electronic sodium ion pathway in the charge and discharge processes.

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A nanocomposite of MoO3 coated with PPy as an anode material for aqueous sodium rechargeable batteries with excellent electrochemical performance

Cited by 123 publications

References 44 publications

Using Polypyrrole Coating to Improve Cycling Stability of NaTi₂(PO₄)₃as an Aqueous Na-Ion Anode

Using Polypyrrole Coating to Improve Cycling Stability of NaTi₂(PO₄)₃as an Aqueous Na-Ion Anode

Recent Progress on Molybdenum Oxides for Rechargeable Batteries

Facile Synthesis of Nanostructured MnO₂ as Anode Materials for Sodium‐Ion Batteries

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A nanocomposite of MoO3 coated with PPy as an anode material for aqueous sodium rechargeable batteries with excellent electrochemical performance

Cited by 123 publications

References 44 publications

Using Polypyrrole Coating to Improve Cycling Stability of NaTi2(PO4)3as an Aqueous Na-Ion Anode

Using Polypyrrole Coating to Improve Cycling Stability of NaTi2(PO4)3as an Aqueous Na-Ion Anode

Recent Progress on Molybdenum Oxides for Rechargeable Batteries

Facile Synthesis of Nanostructured MnO2 as Anode Materials for Sodium‐Ion Batteries

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Using Polypyrrole Coating to Improve Cycling Stability of NaTi₂(PO₄)₃as an Aqueous Na-Ion Anode

Using Polypyrrole Coating to Improve Cycling Stability of NaTi₂(PO₄)₃as an Aqueous Na-Ion Anode

Facile Synthesis of Nanostructured MnO₂ as Anode Materials for Sodium‐Ion Batteries