Highly reversible potassium-ion intercalation in tungsten disulfide

Zhang, Ruding; Bao, Jingze; Pan, Yilong; Sun, Chuan‐Fu

doi:10.1039/c8sc04350g

Cited by 81 publications

(67 citation statements)

References 42 publications

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“…Batteries, especially lithium‐ion batteries (LIBs), are an ideal choice owing to their widespread application in consumer electronics and electric vehicles . However, the debate as to whether lithium resources can meet the growing demand has intensified owing to its low and complicated geographical availability in the Earth's crust . Therefore, cost‐effective alternatives, such as Na and K‐ion batteries (NIBs and KIBs, respectively), have emerged owing to their abundance in the Earth's crust and in oceans.…”

Section: Introductionmentioning

confidence: 99%

CuO Nanoplates for High‐Performance Potassium‐Ion Batteries

Cao

Liu

et al. 2019

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Potassium‐ion batteries (KIBs) are promising alternatives to lithium‐ion batteries because of the abundance and low cost of K. However, an important challenge faced by KIBs is the search for high‐capacity materials that can hold large‐diameter K ions. Herein, copper oxide (CuO) nanoplates are synthesized as high‐performance anode materials for KIBs. CuO nanoplates with a thickness of ≈20 nm afford a large electrode–electrolyte contact interface and short K+ ion diffusion distance. As a consequence, a reversible capacity of 342.5 mAh g−1 is delivered by the as‐prepared CuO nanoplate electrode at 0.2 A g−1. Even after 100 cycles at a high current density of 1.0 A g−1, the capacity of the electrode remains over 206 mAh g−1, which is among the best values for KIB anodes reported in the literature. Moreover, a conversion reaction occurs at the CuO anode. Cu nanoparticles form during the first potassiation process and reoxidize to Cu2O during the depotassiation process. Thereafter, the conversion reaction proceeds between the as‐formed Cu2O and Cu, yielding a reversible theoretical capacity of 374 mAh g−1. Considering their low cost, easy preparation, and environmental benignity, CuO nanoplates are promising KIB anode materials.

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Section: Introductionmentioning

confidence: 99%

CuO Nanoplates for High‐Performance Potassium‐Ion Batteries

Cao

Liu

et al. 2019

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“…Because of the unique SEI formed in highly concentrated KFSI/glyme electrolytes, enhanced cycling ability of perylene‐3,4,9,10‐tetracarboxylic dianhydride, Bi−Sb alloy, and graphite electrodes has been achieved. Similar behavior was also observed for WS 2 and bismuth electrodes in highly concentrated KTFSI/tetraglyme electrolytes …”

Section: Introductionmentioning

confidence: 99%

“…Alternative electrolytes with a new combination of salts and solvents, including high-salt-concentration electrolytes have been reported to improve the stability of K-based cells. [8][9][10][11][12][13][14][15][16][17][18] Among them, highly concentrated glyme-based electrolytes are the most versatile ones. For example, Xiao et al reported the highly concentrated KFSI 0.5 : glyme enabling reversible potassium plating/stripping with an efficiency of 99 %, thanks to the formation of an inorganic compound-rich, solid electrolyte interphase (SEI) on potassium metal.…”

Section: Introductionmentioning

confidence: 99%

“…Similar behavior was also observed for WS 2 and bismuth electrodes in highly concentrated KTFSI/tetraglyme electrolytes. [8,14] So far, the investigation has focused on negative electrode materials. [19,20] In fact, numerous anode materials with high stability, capacity, and rate performance have been developed, such as carbonaceous materials, [21,22] transitional-metal dichalcogenides, [23][24][25] alloy materials, [26,27] phosphides, [11,28] and organic compounds.…”

Section: Introductionmentioning

confidence: 99%

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Highly Concentrated KTFSI : Glyme Electrolytes for K/Bilayered‐V₂O₅ Batteries

Liu

Elia

Gao

et al. 2020

Batteries & Supercaps

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Highly concentrated glyme‐based electrolytes are friendly to a series of negative electrodes for potassium‐based batteries, including potassium metal. However, their compatibility with positive electrodes has been rarely explored. In this work, the influence of the molar fraction of potassium bis(trifluoromethanesulfonyl)imide dissolved in glyme on the cycling ability of K/bilayered‐V2O5 batteries has been investigated. At high salt concentration, the interaction between K+ ions with the glyme is strengthened, leading to a limited number of free glyme molecules. Therefore, the anodic decomposition of the electrolyte solvent, as well as the dissolution of the Al current collectors, is effectively suppressed, resulting in the improved cycling ability of the K/bilayered‐V2O5 cells. In these cells, the positive electrode active material exhibits reversible capacities of 93 and 57 mAh g−1 at specific current densities of 50 and 1000 mA g−1, respectively. After 200 charge‐discharge cycles at 500 mA g−1, the cell retains 94 % of the initial capacity. The promising rate performance and capacity retention demonstrate the importance of proper electrolyte engineering for the K/bilayered‐V2O5 batteries, and the good compatibility of highly concentrated glyme‐based electrolytes with positive electrode materials for potassium batteries.

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“…It is because of the abundance of potassium resource, the nontoxic nature, and its low cost . However, the development of PIB is not without limitation because of the lack of suitable electrode materials that can reversibly store the relatively large size K‐ions . In this study, we prepared the ultrathin rhenium diselenide (ReSe 2 ) nanosheets that could be evenly anchored on the reduced graphene oxide (rGO) nanoflakes by a facile hydrothermal method.…”

mentioning

confidence: 99%

Rhenium Diselenide Anchored on Reduced Graphene Oxide as Anode with Cyclic Stability for Potassium‐Ion Battery

Yang

et al. 2019

Physica Rapid Research Ltrs

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An effective route is developed to fabricate ultrathin rhenium diselenide (ReSe2) nanosheets anchored on reduced graphene oxide (rGO) nanoflakes (ReSe2@rGO). When the ReSe2@rGO is used as an anode material in the potassium‐ion batteries (PIBs), the graphene offers a conductive matrix to buffer the volume alteration during repeated K+ insertion/extraction cycles. The stable interfacial connection between ReSe2 and graphene greatly promotes the integration of the active ReSe2 nanosheets, preventing their agglomeration. At the same time, these ultrathin nanosheets shorten the ion/electron diffusion path, leading to stable cyclic performance. As a result, the ReSe2@rGO anode enhances the electrochemical performance of the as‐synthesized PIB with a high specific capacity of over 250 mAh g−1 at a current density of 500 mA g−1 even after 200 cycles. Excellent rate performance and lengthy cyclic performance with 150 mAh g−1 at 2 A g−1 are also observed even after 500 cycles.

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Highly reversible potassium-ion intercalation in tungsten disulfide

Abstract: 0.62 K+ readily (de)intercalates in WS2 with well-defined voltage plateaus, an intrinsically safe operation potential, and ultrahigh reversibility.

Cited by 81 publications

References 42 publications

CuO Nanoplates for High‐Performance Potassium‐Ion Batteries

CuO Nanoplates for High‐Performance Potassium‐Ion Batteries

Highly Concentrated KTFSI : Glyme Electrolytes for K/Bilayered‐V₂O₅ Batteries

Rhenium Diselenide Anchored on Reduced Graphene Oxide as Anode with Cyclic Stability for Potassium‐Ion Battery

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Highly reversible potassium-ion intercalation in tungsten disulfide

Abstract: 0.62 K+ readily (de)intercalates in WS2 with well-defined voltage plateaus, an intrinsically safe operation potential, and ultrahigh reversibility.

Cited by 81 publications

References 42 publications

CuO Nanoplates for High‐Performance Potassium‐Ion Batteries

CuO Nanoplates for High‐Performance Potassium‐Ion Batteries

Highly Concentrated KTFSI : Glyme Electrolytes for K/Bilayered‐V2O5 Batteries

Rhenium Diselenide Anchored on Reduced Graphene Oxide as Anode with Cyclic Stability for Potassium‐Ion Battery

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Product

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Highly Concentrated KTFSI : Glyme Electrolytes for K/Bilayered‐V₂O₅ Batteries