Scalable synthesis of VN quantum dots encapsulated in ultralarge pillared N-doped mesoporous carbon microsheets for superior potassium storage

Wu, Haoyang; Yu, Qiyao; Lao, Cheng‐Yen; Qin, Mingli; Wang, Wei; Liu, Zhiwei; Cheng, Ming; Wang, Leying; Jia, Baorui; Qu, Xuanhui

doi:10.1016/j.ensm.2018.09.025

Cited by 74 publications

(42 citation statements)

References 48 publications

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“…Where 5wt% fluoroethylene carbonates (FEC) are added to the aforementioned electrolytes,the resultant electrolytes are called KFSI-EPF and KPF-EPF. [29] Thes elected area electron diffraction (SAED) pattern of NCS@RGO-2 ( Figure 1d inset) presents clear diffraction rings that are indicative of ap olycrystalline structure.E lemental mapping of NCS@RGO-2 shows that nickel, cobalt, and sulfur elements are evenly distributed on the NCS/C microrods,indicating that the NCS quantum dots are uniformly distributed within the microrods (Figure 1e). With the introduction of RGO,the NCS/C microrods were wrapped uniformly in RGO to form NCS@RGO-2 ( Figure 1b).…”

Section: Resultsmentioning

confidence: 99%

“…Theq uantum dot structure of NCS provides ample reactive sites,w hich can accelerate the potassium-ion transport rate during the potassiation-depotassiation process. [29] Thes elected area electron diffraction (SAED) pattern of NCS@RGO-2 (Figure 1d inset) presents clear diffraction rings that are indicative of ap olycrystalline structure.E lemental mapping of NCS@RGO-2 shows that nickel, cobalt, and sulfur elements are evenly distributed on the NCS/C microrods,indicating that the NCS quantum dots are uniformly distributed within the microrods (Figure 1e).…”

Section: Resultsmentioning

confidence: 99%

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A Robust Solid Electrolyte Interphase Layer Augments the Ion Storage Capacity of Bimetallic‐Sulfide‐Containing Potassium‐Ion Batteries

et al. 2019

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Metal-organic framework-derived NiCo 2.5 S 4 microrods wrapped in reduced graphene oxide (NCS@RGO) were synthesized for potassium-ion storage.Upon coordination with organic potassium salts,N CS@RGO exhibits an ultrahigh initial reversible specific capacity (602 mAh g À1 at 50 mA g À1 ) and ultralong cycle life (a reversible specific capacity of 495 mAh g À1 at 200 mA g À1 after 1900 cycles over 314 days). Furthermore,t he battery demonstrates ah igh initial Coulombic efficiency of 78 %, outperforming most sulfides reported previously.A dvanced ex situ characterization techniques,i ncluding atomic force microscopy, were used for evaluation and the results indicate that the organic potassium salt-containing electrolyte helps to form thin and robust solid electrolyte interphase layers,w hichr educe the formation of byproducts during the potassiation-depotassiation process and enhance the mechanical stability of electrodes.T he excellent conductivity of the RGO in the composites,a nd the robust interface between the electrodes and electrolytes,i mbue the electrode with useful properties;i ncluding,u ltrafast potassium-ion storage with areversible specific capacity of 402 mAh g À1 even at 2Ag À1 .

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A Robust Solid Electrolyte Interphase Layer Augments the Ion Storage Capacity of Bimetallic‐Sulfide‐Containing Potassium‐Ion Batteries

et al. 2019

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“…The capacitive process including physical adsorption/desorption of electrolyte ions and fast surface redox reactions (capacitive contributions), and the diffusion process is kinetic sluggish redox reactions controlled by the diffusion of electrolyte ion (diffusion-controlled contributions). This method is suitable for batteries due to the narrow range of sweep rates and is widely used in many articles [47][48][49]. For supercapacitors, however, on account of the large range of sweep rate, this method is not appropriate.…”

Section: Electrochemical Analysismentioning

confidence: 99%

NiSe2/Ni(OH)2 Heterojunction Composite through Epitaxial-like Strategy as High-Rate Battery-Type Electrode Material

Mei

Huang

et al. 2020

Nano-Micro Lett.

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“…have been explored as anodes for SIBs previously, [ 101,102 ] and vanadium nitride (VN) can provide outstanding theoretical capacity of 1238 mA h g −1 , associated with the three electron transfer. Strategies such as template method using hard carbon as substrate, [ 103 ] quantum dots encapsulated, [ 104,105 ] carbon fiber loading method, [ 106 ] etc. have been adapted to shape better morphologies.…”

Section: Non‐alkali‐ion Containing Vanadium‐based Composites For Sodimentioning

confidence: 99%

Designing Advanced Vanadium‐Based Materials to Achieve Electrochemically Active Multielectron Reactions in Sodium/Potassium‐Ion Batteries

Chen¹,

Liu

et al. 2020

Advanced Energy Materials

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Next‐generation sodium‐ion batteries (SIBs) and potassium‐ion batteries (PIBs) are considered to be promising alternatives to replace current lithium‐ion batteries due to the high abundance of sodium and potassium resources. New energetic vanadium‐based compounds that undergoes multielectron reactions and demonstrate good sodium/potassium storage capability, provide new solutions for high‐performance SIBs/PIBs in terms of high energy/power density and long‐time cyclability. So far, desirable rich redox centers (V2+‐V5+), consolidated frameworks, and the high theoretical capacities of vanadium‐based compounds have been widely explored for practical applications. Rational materials design utilizing vanadium multiredox centers and the fundamental understanding of their charge‐transfer processes and mechanisms are critical in the development of high‐performance battery systems. The scientific importance and basic design strategies for high performance V‐based anode/cathode materials, structure‐function properties and state‐of‐the‐art understanding of V‐based electrode materials are herein classified and highlighted alongside their design strategies. The important role of the valence electron layer of vanadium, and the scientific advances of vanadium partitions in other electrochemical behaviors are also summarized in detail. Finally, relevant strategies and perspectives discussed in this review provide practical guidance to explore the undiscovered potentials of multi‐electron reaction relationships of not only V‐based composites, but also other types of electrode materials.

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Scalable synthesis of VN quantum dots encapsulated in ultralarge pillared N-doped mesoporous carbon microsheets for superior potassium storage

Cited by 74 publications

References 48 publications

A Robust Solid Electrolyte Interphase Layer Augments the Ion Storage Capacity of Bimetallic‐Sulfide‐Containing Potassium‐Ion Batteries

A Robust Solid Electrolyte Interphase Layer Augments the Ion Storage Capacity of Bimetallic‐Sulfide‐Containing Potassium‐Ion Batteries

NiSe2/Ni(OH)2 Heterojunction Composite through Epitaxial-like Strategy as High-Rate Battery-Type Electrode Material

Designing Advanced Vanadium‐Based Materials to Achieve Electrochemically Active Multielectron Reactions in Sodium/Potassium‐Ion Batteries

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