Metal chalcogenides for potassium storage

Zhou, Jingwen; Liu, Ye; Zhang, Shilin; Zhou, Tengfei; Guo, Zaiping

doi:10.1002/inf2.12101

Cited by 178 publications

(108 citation statements)

References 152 publications

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“…Given the low cost and easy availability, carbon materials have been investigated, however, their theoretical specific capacity (278 mAh•g -1 ) remains unsatisfactory according to the formation of one-stage KC8 in graphite structure via the intercalation chemistry [10][11][12]. In contrast, materials involved in the conversion or alloying chemistry for K + storage are anticipated to provide much higher capacity, such as transition metal dichalcogenides (TMDs) [13,14] and phosphides (TMPs) [15,16]. TMDs have been receiving extensive attention owing to their potential advantages of layered structures with large interlayer spacing, which is favorable for ions diffusion and conversion kinetics [17].…”

Section: Introductionmentioning

confidence: 99%

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Han

et al. 2020

Nano Res.

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Potassium-ion batteries (PIBs) hold great promise as alternatives to lithium ion batteries in post-lithium age, while face challenges of slow reaction kinetics induced by the inherent characteristics of large-size K +. We herein show that creating sufficient exposed edges in MoS 2 via constructing ordered mesoporous architecture greatly favors for improved kinetics as well as increased reactive sites for K storage. The engineered MoS 2 with edge-enriched planes (EE-MoS 2) is featured by three-dimensional bicontinuous frameworks with ordered mesopores of ~ 5.0 nm surrounded by thin wall of ~ 9.0 nm. Importantly, EE-MoS 2 permits exposure of enormous edge planes at pore walls, renders its intrinsic layer spacing more accessible for K + and accelerates conversion kinetics, thus realizing enhanced capacity and high rate capability. Impressively, EE-MoS 2 displays a high reversible charge capacity of 506 mAh•g −1 at 0.05 A•g −1 , superior cycling capacities of 321 mAh•g −1 at 1.0 A•g −1 after 200 cycles and a capacity of 250 mAh•g −1 at 2.0 A•g −1 , outperforming edge-deficient MoS 2 with nonporous bulk structure. This work enlightens the nanoarchitecture design with abundant edges for improving electrochemical properties and provides a paradigm for exploring high-performance PIBs.

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Section: Introductionmentioning

confidence: 99%

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Han

et al. 2020

Nano Res.

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“…The potassium insertion reaction mechanism could be given as follows [Eq. (6)]: [123]

true normalM_{x} normalC_{y} + y z normalK^{+} + y z e^{-} \Leftrightarrow x normalM \cdot \cdot \cdot y normalK_{z} normalC

…”

Section: Anode Materials For Kicsmentioning

confidence: 99%

Emerging Potassium‐ion Hybrid Capacitors

Liu

Chang

et al. 2020

ChemSusChem

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As a new type of capacitor–battery hybrid energy storage device, metal‐ion capacitors have attracted widespread attention because of their high‐power density while ensuring energy density and long lifespan. Potassium‐ion capacitors (KICs) featuring the merits of abundant potassium resources, lower standard electrode potential, and low cost have been considered as potential alternatives to lithium‐/sodium‐ion capacitors. However, KICs still face issues including unsatisfactory reaction kinetics, low energy density, and poor lifetime owing to the large radius of the potassium ion. In this Review, the importance of emerging potassium‐ion capacitor is addressed. The Review offers a brief discussion of the fundamental working principle of KICs, along with an overview of recent advances and achievements of a variety of electrode materials for dual carbon and non‐dual carbon KICs. Furthermore, electrolyte chemistry, binders as well as electrode/electrolyte interface, are summarized. Finally, existing challenges and perspectives on further development of KICs are also presented.

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“…In ordinary, the via van der Waals bonded MoS 2 layers show a large interlayer distance of 0.62 nm (i. e., the distance between the two intermediate MoS 2 layers = 0.31 nm), permitting the intercalation and transport of various ions, especially the alkaline ions. [90] The application of MoS 2 as electrode materials of LIBs, [91] sodium ion batteries, [92] and potassium ion batteries [93] has been widely reported. However, the reversible Zn 2 + intercalation into MoS 2 is more difficult, due to the large size of hydrated Zn 2 + (0.55 nm), the strong Coulombic ionlattice interaction, and the low inherent conductivity of this material.…”

Section: Sulfidesmentioning

confidence: 99%

Rechargeable Aqueous Zinc‐Ion Batteries with Mild Electrolytes: A Comprehensive Review

Kang

Cui

Zhang

et al. 2020

Batteries & Supercaps

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Prof. Jiang's research focuses on energy storage devices, including lithium, sodium, and zinc ion batteries, which are supported by NSFC and major basic research projects of Shandong natural science foundations. Figure 1. a) Diagram of potential-pH value (Pourbaix diagram) of Zn in aqueous solutions. Reproduced with permission from Ref. [25]. Copyright 2015, Wiley-VCH. b) Discharge mechanism of a ZnÀ MnO 2 alkaline battery depicting main side reactions on both electrodes. Reproduced with permission from Ref. [16]. Copyright 2004, American Chemical Society. c) In situ images of electro-plated zinc deposits in a 0.3 cm s À 1 flowing KOH aqueous electrolyte at deposition potential of À 2.55 V. The red parts highlight new Zn deposits growing during the time intervals. Reproduced with permission from Ref. [27].

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Metal chalcogenides for potassium storage

Cited by 178 publications

References 152 publications

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Emerging Potassium‐ion Hybrid Capacitors

Rechargeable Aqueous Zinc‐Ion Batteries with Mild Electrolytes: A Comprehensive Review

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