Preparation of Sb nanoparticles in molten salt and their potassium storage performance and mechanism

Yi, Zheng; Lin, Ning; Zhang, Wanqun; Wang, Weiwei; Zhu, Yongchun; Qian, Yitai

doi:10.1039/c8nr03829e

Cited by 136 publications

(100 citation statements)

References 33 publications

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“…We also assembled a full cell by using an S/N‐CNFAs‐based anode and a potassium prussian blue (KPB)‐based cathode . As shown in Figure c and Figures S9–S11 (Supporting Information), the face‐centered cubic KPB displayed a capacity of 65 mA h g −1 over 65 cycles at 200 mA g −1 as cathode in a half cell . In the voltage range of 2.0–4.2 V, the full cell delivered a first discharge capacity of 198 mA h g −1 (based on the anode mass) at 200 mA g −1 , and retained 92% of the capacity after 60 cycles (Figure d).…”

Section: Resultsmentioning

confidence: 99%

“…Hence, intensive works have been reported to explore suitable electrode materials for PIBs . Recently, various anode materials such as graphite, graphene, and transition metal compounds have been reported for PIBs. Similar to lithium ion batteries (LIBs), earth‐abundant carbonaceous materials are believed to be the brightest anode materials for PIBs due to the abundance and low cost characteristics .…”

Section: Introductionmentioning

confidence: 99%

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3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

Liu

et al. 2019

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Carbonaceous materials are promising anodes for potassium‐ion batteries (PIBs). However, it is hard for large K ions (1.38 Å) to achieve long‐distance diffusion in pristine carbonaceous materials. In this work, the following are synthesized: S/N codoped carbon nanofiber aerogels (S/N‐CNFAs) with optimized electronic structure by S/N codoping, enhanced interlayer spacing by S doping, and a 3D interconnected porous structure of aerogel, through a pyrolysis sustainable seaweed (Fe‐alginate) aerogel strategy. Specifically, the S/N‐CNFAs electrode delivers high reversible capacities of 356 and 112 mA h g−1 at 100 and 5000 mA g−1, respectively. The capacity reaches 168 mA h g−1 at 2000 mA g−1 after 1000 cycles. A full cell with a S/N‐CNFAs anode and potassium prussian blue cathode displays a specific capacity of 198 mA h g−1 at 200 mA g−1. Density functional theory calculations indicate that S/N codoping is beneficial to synergistically improve K ions storage of S/N‐CNFAs by enhancing the adsorption of K ions and reducing the diffusion barrier of K ions. This work offers a facile heteroatom doping paradigm for designing new carbonaceous anodes for high‐performance PIBs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

Liu

et al. 2019

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128

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“…[43] Impressively fast potassium-ion storage performance is evident in our system when compared to the rate performance of previously reported advanced anode materials (Figure 6d). [15,[18][19][20]27,39,[44][45][46][47][48][49] To further verify the cycle life of our electrode,t he long-term cycling performance of NCS@RGO-2 using KFSI-EP electrolyte at 200 mA g À1 was ascertained (Figure 6e). Our NCS@RGO-2 electrode exhibits an excellent cycle stability of 495 mAh g À1 at 200 mA g À1 after 1900 cycles (cycling for 314 days).…”

Section: Angewandte Chemiementioning

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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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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“…However, their low specific capacity (around 200 mAh g −1 ) and high average operating voltage (>0.5 V) limit the energy density of PIBs . Very recently, some noncarbonaceous anodes based on conversion/alloying mechanisms have been explored for K storage, exhibiting increased specific capacity compared with the carbonaceous materials . Among them, Sn‐based compounds (e.g., Sn 4 P 3 , SnS 2 ) combining the conversion and alloying reactions are expected to be promising anode candidates due to their high theoretical specific capacities .…”

Section: Introductionmentioning

confidence: 99%

Few‐Layered Tin Sulfide Nanosheets Supported on Reduced Graphene Oxide as a High‐Performance Anode for Potassium‐Ion Batteries

Fang

Sun

et al. 2019

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Anodes involving conversion and alloying reaction mechanisms are attractive for potassium‐ion batteries (PIBs) due to their high theoretical capacities. However, serious volume change and metal aggregation upon potassiation/depotassiation usually cause poor electrochemical performance. Herein, few‐layered SnS2 nanosheets supported on reduced graphene oxide (SnS2@rGO) are fabricated and investigated as anode material for PIBs, showing high specific capacity (448 mAh g−1 at 0.05 A g−1), high rate capability (247 mAh g−1 at 1 A g−1), and improved cycle performance (73% capacity retention after 300 cycles). In this composite electrode, SnS2 nanosheets undergo sequential conversion (SnS2 to Sn) and alloying (Sn to K4Sn23, KSn) reactions during potassiation/depotassiation, giving rise to a high specific capacity. Meanwhile, the hybrid ultrathin nanosheets enable fast K storage kinetics and excellent structure integrity because of fast electron/ionic transportation, surface capacitive‐dominated charge storage mechanism, and effective accommodation for volume variation. This work demonstrates that K storage performance of alloy and conversion‐based anodes can be remarkably promoted by subtle structure engineering.

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Preparation of Sb nanoparticles in molten salt and their potassium storage performance and mechanism

Cited by 136 publications

References 33 publications

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

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

Few‐Layered Tin Sulfide Nanosheets Supported on Reduced Graphene Oxide as a High‐Performance Anode for Potassium‐Ion Batteries

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