The roles of electrolyte chemistry in hard carbon anode for potassium-ion batteries

Wu, Zhenrui; Zou, Jian; Shabanian, Sadaf; Golovin, Kevin; Liu, Jian

doi:10.1016/j.cej.2021.130972

Cited by 46 publications

(37 citation statements)

References 46 publications

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“…S8 †). 48 Among the three NC coff anodes, the initial depotassiation capacity was higher in the order of 170.29 mA h g À1 for NC coff -800, 153.75 mA h g À1 for NC coff -600, and 134.87 mA h g À1 for NC coff -1000 at a current density of 0.2C (Fig. 5a).…”

Section: Resultsmentioning

confidence: 93%

A nitrogen-doped amorphous/graphitic hybrid carbon material derived from a sustainable resource for low-cost K-ion battery anodes

Jeong

Shin

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 93%

A nitrogen-doped amorphous/graphitic hybrid carbon material derived from a sustainable resource for low-cost K-ion battery anodes

Jeong

Shin

et al. 2022

J. Mater. Chem. A

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“…The effect of KFSI in EC/DEC electrolyte and KFSI in DME electrolyte on the SEI film is also investigated in HC anode by Liu and co‐workers. [ 41 ] They discovered that the R ct of both KFSI EC/DEC and KFSI DME electrolytes decreases obviously after the generation of SEI layer at the 1st cycle (Figure 4f,g), and they ascribed this phenomenon to the formed SEI membrane which effectively improves the charge transfer kinetics. Besides, KFSI DME electrolyte can form a relatively thin SEI layer (Figure 4h,i), and no oxidation peaks are observed at high voltages, indicating that FSI − has an “inhibitory effect” for DME decomposition at 3 V (Figure 4j,k).…”

Section: Research On Solid/liquid Interfacementioning

confidence: 99%

“…Especially, it has been proved by X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS) that the KFSI-induced SEI film is mainly composed of inorganic salt with even distribution features, while KPF 6 salt often leads to the formation of organic SEI layer. [31,[38][39][40] In most cases, the SEI layer induced by KFSI is more stable and uniform, and once this SEI membrane is formed, it can inhibit the continuous decomposition of the electrolyte, [30,41] resulting in improved interfacial behaviors. Shen and co-workers [42] compared the SEI formation behavior on nitrogen-doped graphite foams (NGFs) in 0.6 m KPF 6 in ethylene carbonate (EC)/diethyl carbonate (DEC) (1:1 in volume) and KFSI in EC/DEC (1:1 in volume).…”

Section: Potassium Salt Speciesmentioning

confidence: 99%

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Fundamental Understanding and Research Progress on the Interfacial Behaviors for Potassium‐Ion Battery Anode

Yuan

Zhang

et al. 2022

Advanced Science

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Potassium-ion batteries (PIBs) exhibit a considerable application prospect for energy storage systems due to their low cost, high operating voltage, and superior ionic conductivity. As a vital configuration in PIBs, the two-phase interface, which refers to K-ion diffusion from the electrolyte to the electrode surface (solid-liquid interface) and K-ion migration between different particles (solid-solid interface), deeply determines the diffusion/reaction kinetics and structural stability, thus significantly affecting the rate performance and cyclability. However, researches on two-phase interface are still in its infancy and need further attentions. This review first starts from the fundamental understanding of solid-liquid and solid-solid interfaces to in-depth analyzing the effect mechanism of different improvement strategies on them, such as optimization of electrolyte and binders, heterostructure design, modulation of interlayer spacing, etc. Afterward, the research progress of these improvement strategies is summarized comprehensively. Finally, the major challenges are proposed, and the corresponding solving strategies are presented. This review is expected to give an insight into the importance of two-phase interface on diffusion/reaction kinetics, and provides a guidance for developing other advanced anodes in PIBs.

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“…SEI is formed by the reduction of electrolytes on the anode surface, where the decomposition of solvents and salts forms organic and inorganic components [21,40,41]. The protective SEI layer avoids further reactions between the electrolyte and the anode, which prevents the continuous consumption of the electrolyte.…”

Section: Seimentioning

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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The roles of electrolyte chemistry in hard carbon anode for potassium-ion batteries

Cited by 46 publications

References 46 publications

A nitrogen-doped amorphous/graphitic hybrid carbon material derived from a sustainable resource for low-cost K-ion battery anodes

A nitrogen-doped amorphous/graphitic hybrid carbon material derived from a sustainable resource for low-cost K-ion battery anodes

Fundamental Understanding and Research Progress on the Interfacial Behaviors for Potassium‐Ion Battery Anode

Interphases in the electrodes of potassium ion batteries

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