Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries

Chong, Shaokun; Chen, Yuanzhen; Zheng, Yang; Tan, Qiang; Shu, Chengyong; Liu, Yongning; Guo, Zaiping

doi:10.1039/c7ta08139a

Cited by 133 publications

(89 citation statements)

References 45 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 .…”

Section: Resultsmentioning

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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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%

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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“…[1][2][3][4][5] Unfortunately,o wing to the inhomogeneousd istributiona nd limiteda vailability of lithium resources, LIBsa re subjectt os evere cost problems for their future large-scale energy storage applications. [7,8] The physical andc hemical properties of potassium and lithium are also very similar.A dditionally,t he standard electrochemical potential of K( À2.93 V) is very close to that of Li (À3.04 V) with respect to the standard hydrogen electrode (SHE). [7,8] The physical andc hemical properties of potassium and lithium are also very similar.A dditionally,t he standard electrochemical potential of K( À2.93 V) is very close to that of Li (À3.04 V) with respect to the standard hydrogen electrode (SHE).…”

Section: Introductionmentioning

confidence: 92%

“…[6] As ah opefula lternative candidate to LIBs, potassium-ion batteries (KIBs) have attracted considerable attention because the potassium source is more abundant than lithium in the Earth's crust. [7,8] The physical andc hemical properties of potassium and lithium are also very similar.A dditionally,t he standard electrochemical potential of K( À2.93 V) is very close to that of Li (À3.04 V) with respect to the standard hydrogen electrode (SHE). [9] To date, many types of anode materialsh ave been reported for KIBs.…”

Section: Introductionmentioning

confidence: 92%

Direct Growth of MoO₂/Reduced Graphene Oxide Hollow Sphere Composites as Advanced Anode Materials for Potassium‐Ion Batteries

et al. 2019

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Hollow MoO2/reduced graphene oxide (MoO2/rGO) sub‐microsphere composites have been fabricated through a simple hydrothermal approach followed by a heat treatment process. When employed as an anode material for potassium‐ion batteries, the as‐synthesized MoO2/rGO composite can deliver an initial charge specific capacity of 367.2 mAh g−1 at 50 mA g−1, and its reversible capacity is 218.9 mAh g−1 after 200 cycles. Even when cycled at 500 mA g−1, a high charge specific capacity of 104.2 mAh g−1 is achieved after 500 cycles. The excellent cycling capability and rate performance may be ascribed to the synergistic effects of the reduced graphene oxide and the hollow MoO2 spheres, which can increase the electrical conductivity of the composite, as well as resisting the strain arising from the repeated discharge–charge processes. These results indicate that the MoO2/rGO hollow sphere composites are promising negative electrode materials for potassium‐ion batteries.

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“…11,12 Up until now, very few promising KIB cathode materials have been successfully demonstrated, although positive examples include KVPO 4 F, K 3 V 2 (PO 4 ) 3 , Prussian blue analogs, K 0.7 Fe 0.5 Mn 0.5 O 2 , K 0.6 CoO 2 , K 0.5 MnO 2 , and K 0.5 V 2 O 5 . [13][14][15][16][17][18][19][20] However, achieving high capacity and average voltage, especially in conjunction with high power density, remains a daunting challenge.…”

Section: Introductionmentioning

confidence: 99%

Reconstructed Orthorhombic V2O5 Polyhedra for Fast Ion Diffusion in K-Ion Batteries

Zhu

Zhang

Yang

et al. 2019

Chem

190

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To unlock the compact structure of a-V 2 O 5 for the diffusion of K + , we developed single-crystalline bilayered d-K 0.51 V 2 O 5 nanobelts via reconstruction of a-V 2 O 5 . Benefiting from the large interlayer space and optimized growth orientation, d-K 0.51 V 2 O 5 exhibits suitable accommodation sites and fast diffusion paths for K + , enabling high capacity and rate capability. Additionally, the achievement of a high-energy-and high-power-density full K-ion battery proves its feasibility in large-scale energy storage systems. SUMMARYPotassium-ion batteries (KIBs) are a promising alternative to lithium-ion batteries because of the abundance, low cost, and redox potential of K; however, the significantly larger radius of K + inevitably destabilizes the crystal structure of the cathode material, impeding the diffusion of K + . Here, to lower the insertion energetics and diffusion barriers of K + , we synthesizedd-K 0.51 V 2 O 5 nanobelts (KVOs) with a large interlayered structure and optimized growth orientation by reconstructing the V-O polyhedra of orthorhombic V 2 O 5 ; these exhibited a high average voltage (3.2 V), high capacity (131 mAh g À1 ), and superior rate capability even at 10 A g À1 . By coupling the electrochemical experiments with theoretical calculations, we found that the excellent K-ion storage performance of KVO is attributed to its large interlayered structure and unique 1D morphology. Additionally, we assembled a full KIB composed of KVO and graphite with high energy and power densities, proving its feasibility as a promising new battery.

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Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries

Abstract: KFeII[FeIII(CN)6] with a symmetric cubic structure exhibits exceptional electrochemical performance based on a solid solution mechanism, and its high structural stability and electrochemical reversibility.

Cited by 133 publications

References 45 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

Direct Growth of MoO₂/Reduced Graphene Oxide Hollow Sphere Composites as Advanced Anode Materials for Potassium‐Ion Batteries

Reconstructed Orthorhombic V2O5 Polyhedra for Fast Ion Diffusion in K-Ion Batteries

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Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries

Abstract: KFeII[FeIII(CN)6] with a symmetric cubic structure exhibits exceptional electrochemical performance based on a solid solution mechanism, and its high structural stability and electrochemical reversibility.

Cited by 133 publications

References 45 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

Direct Growth of MoO2/Reduced Graphene Oxide Hollow Sphere Composites as Advanced Anode Materials for Potassium‐Ion Batteries

Reconstructed Orthorhombic V2O5 Polyhedra for Fast Ion Diffusion in K-Ion Batteries

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Direct Growth of MoO₂/Reduced Graphene Oxide Hollow Sphere Composites as Advanced Anode Materials for Potassium‐Ion Batteries