High capacity potassium-ion battery anodes based on black phosphorus

Sultana, Irin; Rahman, Mokhlesur; Ramireddy, Thrinathreddy; Chen, Ying; Glushenkov, Alexey M.

doi:10.1039/c7ta02483e

Cited by 248 publications

(182 citation statements)

References 30 publications

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“…The average voltage of Na intercalation with undoped BP is predicted to be 0.15 V, which is lower than the S‐doped BP . Furthermore, for KIB, electrode assembled with pure BP is evaluated in a potential window of 0.01–2 V and the voltage profile of S‐doped BP is in the scope of pure BP . At the moment, the primary choice for NIBs anode is hard carbon, whose capacity (300 mAh g −1 ) is lower than that of the S‐doped BP anode in NIBs (431 mAh g −1 ).…”

Section: Resultsmentioning

confidence: 99%

Sulfur‐Doped Phosphorene as a Promising Anode for Na and K‐Ion Batteries

Hao

Wang

2019

Physica Status Solidi (b)

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In the present work, a novel anode candidate – sulfur‐doped phosphorene – for the Na‐ion batteries and K‐ion batteries has been proposed. The doped geometry, Na/K adsorption energy, average open‐circuit voltage, specific capacity, Na/K diffusion barriers, and charge transfer on sulfur‐doped phosphorene sheets are investigated through the way of adopting ab initio periodic quantum chemical method. The results demonstrate that, toward the directions of armchair and zigzag, the energy barriers of Na/K diffusion on the doped monolayer are 0.81/0.68 and 0.14/0.08 eV, respectively. In addition, the theoretical specific storage capacity of sulfur‐doped phosphorene in Na‐ion batteries is 431 mAh g−1, which is larger than for other commercial anode materials. Besides, the Na/K insertion/diffusion in sulfur‐doped phosphorene well preserves its structural integrity. Owing to its good stability, high capacity, excellent electrical conductivity and high Na/K mobility, sulfur‐doped phosphorene will have immense application prospects as anode material for Na‐ion batteries, K‐ion batteries and other novel electronic devices.

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Section: Resultsmentioning

confidence: 99%

Sulfur‐Doped Phosphorene as a Promising Anode for Na and K‐Ion Batteries

Hao

Wang

2019

Physica Status Solidi (b)

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“…Transmission electron microscope images also indicate the integrity of the SEI layer formed in 1 m KFSI/EC+DEC (Figure S13), suggesting that the electrolyte benefits from the formation of a stable SEI layer on the RP/C alloying anode to accommodate the volume change during cycling. In addition, the final potassiation product of RP is shown to be KP (Figure S14,15) …”

Section: Figurementioning

confidence: 99%

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Wang

et al. 2019

Angewandte Chemie

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Alloying anodes are promising high‐capacity electrode materials for K‐ion batteries (KIBs). However, KIBs based on alloying anodes suffer from rapid capacity decay due to the instability of K metal and large volume expansion of alloying anodes. Herein, the effects of salts and solvents on the cycling stability of KIBs based on a typical alloying anode such as amorphous red phosphorus (RP) are investigated, and the potassium bis(fluorosulfonyl)imide (KFSI) salt‐based carbonate electrolyte is versatile to achieve simultaneous stabilization of K metal and RP electrodes for highly stable KIBs. This salt‐solvent complex with a moderate solvation energy can alleviate side reactions between K metal and the electrolyte and facilitate K+ ion diffusion/desolvation. Moreover, robust SEI layers that form on K metal and RP electrodes can suppress K dendrite growth and resist RP volume change. This strategy of electrolyte regulation can be applicable to other alloying anodes for high‐performance KIBs.

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“…Whilst major breakthroughs have been reported in the use of graphite 24 , phosphorus 25 , oxides (such as K 2 Ti 8 O 17 26 , K 2 Ti 4 O 9 27 , Co 3 O 4 -Fe 2 O 3 composites 28 , etc.) and sulphides (namely, MoS 2 29 and SnS 2 30 ) as anode materials, identifying cathode frameworks that can facilitate reversible K-ion insertion is a daunting challenge.…”

Section: Introductionmentioning

confidence: 99%

Rechargeable potassium-ion batteries with honeycomb-layered tellurates as high voltage cathodes and fast potassium-ion conductors

Masese¹,

Yoshii²,

Yamaguchi³

et al. 2018

Nat Commun

233

255

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Rechargeable potassium-ion batteries have been gaining traction as not only promising low-cost alternatives to lithium-ion technology, but also as high-voltage energy storage systems. However, their development and sustainability are plagued by the lack of suitable electrode materials capable of allowing the reversible insertion of the large potassium ions. Here, exploration of the database for potassium-based materials has led us to discover potassium ion conducting layered honeycomb frameworks. They show the capability of reversible insertion of potassium ions at high voltages (~4 V for K2Ni2TeO6) in stable ionic liquids based on potassium bis(trifluorosulfonyl) imide, and exhibit remarkable ionic conductivities e.g. ~0.01 mS cm−1 at 298 K and ~40 mS cm–1 at 573 K for K2Mg2TeO6. In addition to enlisting fast potassium ion conductors that can be utilised as solid electrolytes, these layered honeycomb frameworks deliver the highest voltages amongst layered cathodes, becoming prime candidates for the advancement of high-energy density potassium-ion batteries.

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High capacity potassium-ion battery anodes based on black phosphorus

Abstract: Potassium electrochemistry of a battery anode based on black phosphorus is reported. The phosphorus component operates via electrochemical alloying with potassium and has a theoretical capacity of 843 mA h g−1.

Cited by 248 publications

References 30 publications

Sulfur‐Doped Phosphorene as a Promising Anode for Na and K‐Ion Batteries

Sulfur‐Doped Phosphorene as a Promising Anode for Na and K‐Ion Batteries

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Rechargeable potassium-ion batteries with honeycomb-layered tellurates as high voltage cathodes and fast potassium-ion conductors

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