Amorphous Molybdenum Disulfide Cathodes

Jacobson, Allan J.; Chianelli, Russell R.; Whittingham, M. S.

doi:10.1149/1.2128950

Cited by 72 publications

(24 citation statements)

References 2 publications

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“…Electrochemically active metal oxides/sulfides for enhancing W V . a) Potential (vs Li/Li + ) versus specific capacity of several active metal oxides and sulfides: Mo 6 S 8 , [ 32b ] amorphous MoS 2 , [ 93 ] VO 2 , [ 94 ] V 2 O 5 , [ 95 ] TiS 2 , [ 92b,96 ] RuO 2 , [ 97 ] FeS, [ 98 ] FeS 2 , [ 99 ] CuS. [ 100 ] b) Discharge–charge curves of hybrid S/FeS 2 /FeS composite in ether‐based electrolyte.…”

Section: Recent Progress On Wv Of Li–s Batterymentioning

confidence: 99%

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

et al. 2020

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ising candidates for the next generation of high energy storage system. Since proposed in the 1960s, [3] Li-S battery experienced an infancy stage in 1970-1990s, when researchers devoted to the fundamental redox reactions of sulfur in various electrolytes, [4] and a flourishing period after 2000 when high performance was achieved through sulfur/carbon (S/C) cathode and sulfurized-polyacrylonitrile (SPAN) cathode in ether-and carbonatebased electrolytes, respectively. [5] After 2009, great efforts have been made to further enahnce Li-S battery, including fabricating conductive cathode, [6] incorporating electrocatalyst, [7] modifying separator, [8] optimizing electrolyte, [9] and protecting lithium anodes. [10] The rational design of electrode structure with various carbon materials (1D, 2D, and 3D) greatly boosts the electrochemical performance of sulfur cathode. [11] Although the cycle stability is still struggling with 100 cycles, the gravimetric energy density (W G) of Li-S pouch cells has improved remarkably to promote the applications in which weight matters more than longevity. For example, Sion Power, a pioneer corporation in Li-S battery technology, has developed several prototypical Li-S cells with energy density of 350 Wh kg −1 /325 Wh L −1 for powering Airbus's Zephyr 7 drone for an 11-day nonstop flight in 2014. [12] Oxis Energy, another manufacture of Li-S battery, announced a new target of 500 Wh kg −1 in the near future after achieving 400 Wh kg −1 / 300 Wh L −1 for e-Buses, trucks, and marine applications. [13] Research institutions from China have also reported pouch Li-S cells with the energy density up to 400-600 Wh kg −1 for the potential application in unmanned aerial vehicle. [14] It is remarkable that the W G of Li-S battery has exceeded that of the best Li-ion batteries (250-300 Wh kg −1) with Ni-rich oxide cathode from Contemporary Amperex Technology Co., Ltd. (CATL), a giant manufacture of Li-ion batteries (Figure 1). With such great advantages, Li-S battery is possible to compete with commercial Li-ion batteries in specific field where high W G is the primary concern. Despite the attractive high W G , Li-S battery pales in comparison with Li-ion batteries in terms of volumetric energy density (W V). [18] Figure 1 compares W V and W G between Li-S and Li-ion batteries. With Ni-rich metal oxide as cathode, Li-ion batteries have already reached 700 Wh L −1 and can even exceed 1000 Wh L −1 for W V when coupling with high capacity Lithium-sulfur (Li-S) batteries hold the promise of the next generation energy storage system beyond state-of-the-art lithium-ion batteries. Despite the attractive gravimetric energy density (W G), the volumetric energy density (W V) still remains a great challenge for the practical application, based on the primary requirement of Small and Light for Li-S batteries. This review highlights the importance of cathode density, sulfur content, electroactivity in achieving high energy densities. In the first part, key factors are analyzed in a model on negative/positive ...

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Section: Recent Progress On Wv Of Li–s Batterymentioning

confidence: 99%

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

et al. 2020

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“…This greatly limits the cycling Coulombic efficiency and lifetime of the batteries, and sometimes can even lead to catastrophic, hazardous failure when Li filaments penetrate the separator membrane to short the batteries. [1][2][3][4][5][6][7][8] A number of strategies have been developed to address the problems associated with Li filaments. For example, one can make the battery structure more robust by employing solid electrolytes that are not easily pierced by Li dendrites, 5,6,9 and strengthen the SEI by adjusting the formulation of the liquid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Crumpled Graphene Balls Stabilized Dendrite-free Lithium Metal Anodes

Liu

Wang

et al. 2018

Joule

306

199

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With its high theoretical capacity and low electrochemical potential, Li metal itself would be the ideal anode for Li-ion batteries. However, practical use of Li anode has been hindered by its tendency for filament or dendritic growth. Here we report a highly effective scaffold based on crumpled paper ball-like graphene particles. We found that these crumpled graphene balls are suitable for constructing highperformance Li metal anodes.

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“…[47] We note that Li + intercalation in MoS 2 is not a new idea. [48][49][50] MoS 2 was seriously considered as a commercial secondary battery in the 1980's because the reversibility is extremely favorable when the lithium concentration in MoS 2 is limited to 1 mole, [50][51][52][53] usually by limiting the lower cut-off voltage window to above 0.8 V vs. Li/Li + . [54] In our previous paper, we demonstrated that mesoporous MoS 2 thin films exhibited high levels of pseudocapacitive charge storage, emphasizing the promise of this material system as a fast charging, high power, long lifetime material.…”

Section: Introductionmentioning

confidence: 99%

Pseudocapacitive Charge Storage in Thick Composite MoS₂ Nanocrystal‐Based Electrodes

Cook

Kim

Lin

et al. 2016

Advanced Energy Materials

238

145

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A synthesis methodology is demonstrated to produce MoS2 nanoparticles with an expanded atomic lamellar structure that are ideal for Faradaic‐based capacitive charge storage. While much of the work on MoS2 focuses on the high capacity conversion reaction, that process is prone to poor reversibility. The pseudocapacitive intercalation‐based charge storage reaction of MoS2 is investigated, which is extremely fast and highly reversible. A major challenge in the field of pseudocapacitive‐based energy storage is the development of thick electrodes from nanostructured materials that can sustain the fast inherent kinetics of the active nanocrystalline material. Here a composite electrode comprised of a poly(acrylic acid) binder, carbon fibers, and carbon black additives is utilized. These electrodes deliver a specific capacity of 90 mAh g−1 in less than 20 s and can be cycled 3000 times while retaining over 80% of the original capacity. Quantitative kinetic analysis indicates that over 80% of the charge storage in these MoS2 nanocrystals is pseudocapacitive. Asymmetric full cell devices utilizing a MoS2 nanocrystal‐based electrode and an activated carbon electrode achieve a maximum power density of 5.3 kW kg−1 (with 6 Wh kg−1 energy density) and a maximum energy density of 37 Wh kg−1 (with 74 W kg−1power density).

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Amorphous Molybdenum Disulfide Cathodes

Cited by 72 publications

References 2 publications

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

Crumpled Graphene Balls Stabilized Dendrite-free Lithium Metal Anodes

Pseudocapacitive Charge Storage in Thick Composite MoS₂ Nanocrystal‐Based Electrodes

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Amorphous Molybdenum Disulfide Cathodes

Cited by 72 publications

References 2 publications

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

Crumpled Graphene Balls Stabilized Dendrite-free Lithium Metal Anodes

Pseudocapacitive Charge Storage in Thick Composite MoS2 Nanocrystal‐Based Electrodes

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Pseudocapacitive Charge Storage in Thick Composite MoS₂ Nanocrystal‐Based Electrodes