Comprehensive Insights into Electrolytes and Solid Electrolyte Interfaces in Potassium-Ion Batteries

Xiao, Zhang; Meng, Jiashen; Wang, Chongmin; Xiao, Zhitong; Wu, Peijie; Mai, Liqiang

doi:10.1016/j.ensm.2021.02.036

Cited by 86 publications

(81 citation statements)

References 130 publications

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“…Therefore, the PIHCs is assembled by matching the AC cathode and NPC anode (named AC//NPC), in which the anions (PF 6 À ) in the electrolyte migrate and adsorb to the AC surface, while the K + absorbs onto the surface of NPC and intercalate within it. It should be noted that the working voltage window of the AC//NPC is set between 0.01 and 4.0 V to avoid the electrolyte decomposition and other side reactions based on the electrochemical stability window of 0.8 M KPF 6 /EC/DEC being below 4.2 V. 42,43 Particularly, the electrochemical properties of the AC cathode in terms of the rate capability and CV are measured and displayed in Fig. S18a and b, ESI.…”

Section: Resultsmentioning

confidence: 99%

Interconnected 3D carbon network with enhanced reaction kinetics and architecture stability for advanced potassium-ion hybrid capacitors

Wang

Yuan

Zhang

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

Interconnected 3D carbon network with enhanced reaction kinetics and architecture stability for advanced potassium-ion hybrid capacitors

Wang

Yuan

Zhang

et al. 2022

Phys. Chem. Chem. Phys.

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“…S1). The ion conductivities of 1 M KFSI and LiPF6 in dimethyl ether (DME) have been reported to be 7.2 and 5.8 mS cm −1 , respectively [30]. Thus, the ion conductivities obtained using conductometry indicate that the 1 M KFSI ion conductivity larger than 1 M LiPF6 and 1 M LiFSI.…”

Section: Resultsmentioning

confidence: 99%

“…The ion conductivities of 1 M LiPF6, 1 M LiFSI and 1 M KFSI determined using conductometry were 3.876, 3.65 and 8.47 mS cm −1 , respectively (Table S1). The ion conductivities of 1 M KFSI and LiPF6 in dimethyl ether (DME) have been reported to be 7.2 and 5.8 mS cm −1 , respectively [30]. Thus, the ion conductivities obtained using conductometry indicate that the 1 M KFSI ion conductivity larger than 1 M LiPF6 and 1 M LiFSI.…”

Section: Resultsmentioning

confidence: 99%

Lithium and Potassium Cations Affect the Performance of Maleamate-Based Organic Anode Materials for Potassium- and Lithium-Ion Batteries

et al. 2021

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In this study we prepared potassium-ion batteries (KIBs) displaying high output voltage and, in turn, a high energy density, as replacements for lithium-ion batteries (LIBs). Organic electrode materials featuring void spaces and flexible structures can facilitate the mobility of K+ to enhance the performance of KIBs. We synthesized potassium maleamate (K-MA) from maleamic acid (MA) and applied as an anode material for KIBs and LIBs, with 1 M potassium bis(fluorosulfonyl)imide (KFSI) and 1 M lithium bis(fluorosulfonyl)imide (LiFSI) in a mixture of ethylene carbonate and ethyl methyl carbonate (1:2, v/v) as respective electrolytes. The K-MA_KFSI anode underwent charging/discharging with carbonyl groups at low voltage, due to the K···O bond interaction weaker than Li···O. The K-MA_KFSI and K-MA_LiFSI anode materials delivered a capacity of 172 and 485 mA h g−1 after 200 cycles at 0.1C rate, respectively. K-MA was capable of accepting one K+ in KIB, whereas it could accept two Li+ in a LIB. The superior recoveries performance of K-MA_LiFSI, K-MA_KFSI, and Super P_KFSI at rate of 0.1C were 320, 201, and 105 mA h g−1, respectively. This implies the larger size of K+ can reversibly cycling at high rate.

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“…Potassium hexafluorophosphate (KPF 6 ), potassium bis(fluorosulfonyl)imide (KFSI) and potassium bis(trifluoromethylsulfonyl)imide (KTFSI) show superior ionic conductivities compared with potassium tetrafluoroborate (KBF 4 ), potassium perchlorate (KClO 4 ) and potassium trifluoromethanesulfonate (KCF 3 SO 3 ). KFSI and KTFSI possess the highest solubility in non-aqueous solvents [51]. All the salts show similar LUMO energy levels, while KPF 6 and KBF 4 have the highest HOMO energy [18].…”

Section: Sei Regulation With Electrolyte Engineeringmentioning

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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Comprehensive Insights into Electrolytes and Solid Electrolyte Interfaces in Potassium-Ion Batteries

Cited by 86 publications

References 130 publications

Interconnected 3D carbon network with enhanced reaction kinetics and architecture stability for advanced potassium-ion hybrid capacitors

Interconnected 3D carbon network with enhanced reaction kinetics and architecture stability for advanced potassium-ion hybrid capacitors

Lithium and Potassium Cations Affect the Performance of Maleamate-Based Organic Anode Materials for Potassium- and Lithium-Ion Batteries

Interphases in the electrodes of potassium ion batteries

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