α-MoO3 spheres as effective polysulfides adsorbent for high sulfur content cathode in lithium-sulfur batteries

Ji, Penghui; Shang, Biao; Peng, Qimeng; Hu, Xiaoyun; Wei, Jianwei

doi:10.1016/j.jpowsour.2018.08.055

Cited by 67 publications

(29 citation statements)

References 45 publications

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“…[36,37] In addition, the amount of the carbonaceous conductive agent in the active material is ak ey feature. [38] Despite the fact that the carbon material plays ac rucial role in the mechanical and electrochemical performanceso ft he battery,f or practical applications, it has to be kept at the minimum weight% value of around 30 %, [39][40][41] to minimize the decrease in energy density and specific capacity. [42] The failure to design as uitable sulfur-carbonc omposite and production pathway, targetingt he above requirements,r epresents am ajor obstacle for the spread of Li-S storage technology.…”

Section: Introductionmentioning

confidence: 99%

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

et al. 2019

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Lithium‐sulfur batteries are the most promising candidates for next‐generation energy storage devices owing to their high theoretical specific capacity of 1675 mAh g−1 and high theoretical energy density of approximately 3500 Wh kg−1. However, the lack of cathode active materials with appropriate electrical conductivities and stability coupled with an inexpensive and industrially compatible production process has so far hindered the development of practical devices. Here, a facile preparation pathway is reported for the production of a sulfur–carbon composite active material by drying a mixture of highly conductive few‐layer graphene (FLG) flakes (produced by exploiting an innovative wet jet milling process with a yield of ≈100 % and production capability of ≈23.5 g h−1) with elemental sulfur, using ethanol as an environmentally friendly solvent. The designed sulfur–FLG composite shows excellent electrochemical results. The assembled lithium–sulfur battery exhibits a stable rate capability up to a current rate of 2C, a coulombic efficiency approaching 100 % for 300 cycles at the current rate of C/4 (420 mA g−1), and a long cycle life up to 500 cycles delivering around 600 mAh g−1 at 2C (3350 mA g−1).

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Section: Introductionmentioning

confidence: 99%

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

et al. 2019

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“…Considering the overlap of the redox potential belongs to MoO 3 and sulfur, it is worth investigating the statement of the lithiation of MoO 3 during the charge and discharge process with the LSBs voltage window (1.7–2.8 V vs Li/Li + ). [ 31 ] In situ XRD was conducted to investigate the LSB with the MO/SP/NF interlayer (Figure S4, Supporting Information). From the matched in situ XRD images and the capacity–voltage curves of the cell, there is a periodic peak variation between 34° and 44° along with the discharge/charge process of the cell.…”

Section: Resultsmentioning

confidence: 99%

In Situ Electrochemical Activation Derived Li_xMoO_y Nanorods as the Multifunctional Interlayer for Fast Kinetics Li‐S batteries

Yang

et al. 2021

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Li‐S batteries (LSBs) have attracted worldwide attention owing to their characteristics of high theoretical energy density and low cost. However, the commercial promotion of LSBs is hindered by the irreversible capacity decay and short cycling life caused by the shuttle effect of lithium‐polysulfides (LiPSs). Herein, a hybrid interlayer consisting of MoO3, conductive Ni foam, and Super P is prepared to prevent the shuttle effect and catalyze the LiPSs conversion. MoO3 with a reversible lithiation/delithiation behavior between Li0.042MoO3 and Li2MoO4 within 1.7–2.8 V versus Li/Li+ combines the Li+ insertion and LiPSs immobilization and efficiently improve the LSBs redox kinetics. Benefiting from the reversible Li+ insertion/extraction in lithium molybdate (LixMoOy) and the highly conductive Ni foam substrate, the sulfur cathode coupled with such electrochemical activation derived catalytic interlayer exhibits a high initial discharge capacity of 1100.1 mAh g−1 at a current density of 1 C with a low decay rate of 0.09% cycle−1. Good capacity retention can still be obtained even the areal sulfur loading is increased to 13.28 mg cm−2.

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“…The peak is related to the irreversible process of electrolyte decomposition at about 2.1 V. [23] The two oxidation peaks symbolizing the dealloying reaction of Na 15 Sn 4 and Na 3 Sb are locate at around 0.66 and 0.83 V. Due to the existence of activation process the oxidation peak in the first cycle and the oxidation peak in the subsequent cycles appear obvious deviation. [24] Besides, peaks at 2.6 and 2.86 appeared in the anodic scan of the first cycle, which may be related to Na + extraction from the layered structure. [25] Compared with the CV curve of SnSb in Figure S5a, the CV curves of SnSb/3D-rNGO and SnSb/3D-rGO overlapped better after the two subsequent cycles respectively.…”

Section: Resultsmentioning

confidence: 99%

The Dual Capacity Contribution Mechanism of SnSb‐Anchored Nitrogen‐Doped 3D Reduced Graphene Oxide Enhances the Performance of Sodium‐Ion Batteries

et al. 2020

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Nanoscale SnSb alloys exhibit lower expansion rates and outstanding electrochemical properties, owing to the synergy between Sn and Sb for anode materials of sodium-ion batteries. However, nanomaterials with a high surface energy tend to aggregate and form larger secondary particles, limiting their further application. Herein, SnSb nanoparticles are prepared and distributed in three-dimensional networks of N-doped reduced graphene oxide (3D-rNGO), which plays a crucial role in inhibiting the agglomeration of SnSb nanoparticles, thereby promoting the capacitive contribution of surface drive. More importantly, the three-dimensional structure has a high specific surface area and the active region introduced by N doping can contact and adsorb more sodium ions as part of the electrochemical behavior, making the SnSb/3D-rNGO anode not only contribute capacity through a diffusion process, but also provide a capacitive contribution through a surface-driven mechanism. The results of the electrochemical analysis showed that SnSb/3D-rNGO, as the anode of a sodium-ion battery, exhibits a high specific capacity of 1169.6 mAh g À 1 , a reversible capacity of 55 % at 0.1 C, and maintains a capacity of 479.3 mAh g À 1 after 200 cycles. It is suitable for energy storage precisely because of the double capacity contribution mechanism.

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α-MoO3 spheres as effective polysulfides adsorbent for high sulfur content cathode in lithium-sulfur batteries

Cited by 67 publications

References 45 publications

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

In Situ Electrochemical Activation Derived Li_xMoO_y Nanorods as the Multifunctional Interlayer for Fast Kinetics Li‐S batteries

The Dual Capacity Contribution Mechanism of SnSb‐Anchored Nitrogen‐Doped 3D Reduced Graphene Oxide Enhances the Performance of Sodium‐Ion Batteries

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α-MoO3 spheres as effective polysulfides adsorbent for high sulfur content cathode in lithium-sulfur batteries

Cited by 67 publications

References 45 publications

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

In Situ Electrochemical Activation Derived LixMoOy Nanorods as the Multifunctional Interlayer for Fast Kinetics Li‐S batteries

The Dual Capacity Contribution Mechanism of SnSb‐Anchored Nitrogen‐Doped 3D Reduced Graphene Oxide Enhances the Performance of Sodium‐Ion Batteries

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In Situ Electrochemical Activation Derived Li_xMoO_y Nanorods as the Multifunctional Interlayer for Fast Kinetics Li‐S batteries