Improvement in potassium ion batteries electrodes: Recent developments and efficient approaches

Ahmed, Syed Musab; Suo, Guoquan; Wang, Wei; Xi, Kai; Iqbal, Saad Bin

doi:10.1016/j.jechem.2021.03.032

Cited by 82 publications

(31 citation statements)

References 234 publications

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“…As displayed in Figure a, the broad (002) diffraction peaks in X‐ray diffraction patterns (XRD) indicate the defective nature of CNS, which can be further proved by the Raman spectra (Figure S12, Supporting Information). [ 49,50 ] The Raman spectrum of CNS‐300 possesses strong G band and multi‐peaks between 250 and 750 cm −1 , which is ascribed to inheritance of some hybridized sp 2 pentagon structure from rhodanine. [ 35 ] For CNS‐400, 600, 800 and 1000, the band intensity ratios of the D band to the G band ( I D / I G ) are 0.95, 1.02, 1.05 and 1.04, respectively (Figure 2e).…”

Section: Resultsmentioning

confidence: 99%

Defect‐Selectivity and “Order‐in‐Disorder” Engineering in Carbon for Durable and Fast Potassium Storage

et al. 2022

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Defect‐rich carbon materials possess high gravimetric potassium storage capability due to the abundance of active sites, but their cyclic stability is limited because of the low reversibility of undesirable defects and the deteriorative conductivity. Herein, in situ defect‐selectivity and order‐in‐disorder synergetic engineering in carbon via a self‐template strategy is reported to boost the K+‐storage capacity, rate capability and cyclic stability simultaneously. The defect‐sites are selectively tuned to realize abundant reversible carbon‐vacancies with the sacrifice of poorly reversible heteroatom‐defects through the persistent gas release during pyrolysis. Meanwhile, nanobubbles generated during the pyrolysis serve as self‐templates to induce the surface atom rearrangement, thus in situ embedding nanographitic networks in the defective domains without serious phase separation, which greatly enhances the intrinsic conductivity. The synergetic structure ensures high concentration of reversible carbon‐vacancies and fast charge‐transfer kinetics simultaneously, leading to high reversible capacity (425 mAh g−1 at 0.05 A g−1), high‐rate (237.4 mAh g−1 at 1 A g−1), and superior cyclic stability (90.4% capacity retention from cycle 10 to 400 at 0.1 A g−1). This work provides a rational and facile strategy to realize the tradeoff between defect‐sites and intrinsic conductivity, and gives deep insights into the mechanism of reversible potassium storage.

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Section: Resultsmentioning

confidence: 99%

Defect‐Selectivity and “Order‐in‐Disorder” Engineering in Carbon for Durable and Fast Potassium Storage

et al. 2022

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“…For example, graphite suffers more than 60% of volume expansion when cycled in carbonate electrolytes [84], and the expansion can be as high as 400% in the case of Bi or Sb [85,86]. Carbonaceous coating on active materials has been extensively used to accommodate the volume changes during cycling and compensate for the insufficient electronic conductivity of anode materials [87][88][89][90][91]. A surface coating layer forms an interphase on the active material, and the atomic interaction at the interphase can increase the adsorption of K-ions and reduce the energy barriers of K-ion migration.…”

Section: Interphases In Composite Anodesmentioning

confidence: 99%

Interphases in the electrodes of potassium ion batteries

et al. 2022

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Rechargeable potassium-ion batteries (PIBs) are of great interest as a sustainable, environmentally friendly, and cost-effective energy storage technology. The electrochemical performance of a PIB is closely related to the reaction kinetics of active materials, ionic/electronic transport, and the structural/electrochemical stability of cell components. Alongside the great effort devoted in discovering and optimising electrode materials, recent research unambiguously demonstrates the decisive role of the interphases that interconnect adjacent components in a PIB. Knowledge of interphases is currently less comprehensive and satisfactory compared to that of electrode materials, and therefore, understanding the interphases is crucial to facilitate electrode materials design and advance battery performance. The present review aims to summarise the critical interphases that dominate the overall battery performance of PIBs, which includes solid-electrolyte interphase (SEI), cathode-electrolyte interphase (CEI), and solid-solid interphases in composite electrodes, via exploring their formation principles, chemical compositions, and determination of reaction kinetics. State-of-the-art design strategies of robust interphases are discussed and analysed. Finally, perspectives are given to stimulate new ideas and open questions to further the understanding of interphases and the development of PIBs.

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“…In detail, metal cations transport from the anode (cathode) to the cathode (anode) through the separator in the electrolyte while electrons travel from the anode (cathode) to the cathode (anode) along the external circuit during discharging (charging). [174] Till now, MXene/CNT hybrids have been applied…”

Section: Metal-ion Batteriesmentioning

confidence: 99%

MXene/Carbon Nanotube Hybrids: Synthesis, Structures, Properties, and Applications

Zhou

et al. 2021

ChemSusChem

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tectures have been synthesized by a number of methods and applied in numerous fields. Herein, after the discussion about general synthesis approaches, architectures, and properties of the hybrids, this Review summarized the recent advances in the application of MXene/CNT hybrids in energy storage devices, sensors, electrocatalysis, electromagnetic interference shielding, and water treatment, in which the function of individual components was clarified. In the end, the current research trend in this field were discussed and several technical issues were highlighted along with some suggestions on future research directions.

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Improvement in potassium ion batteries electrodes: Recent developments and efficient approaches

Cited by 82 publications

References 234 publications

Defect‐Selectivity and “Order‐in‐Disorder” Engineering in Carbon for Durable and Fast Potassium Storage

Defect‐Selectivity and “Order‐in‐Disorder” Engineering in Carbon for Durable and Fast Potassium Storage

Interphases in the electrodes of potassium ion batteries

MXene/Carbon Nanotube Hybrids: Synthesis, Structures, Properties, and Applications

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