High cycling stability graphite cathode modified by artificial CEI for potassium-based dual-ion batteries

Wang, Qing; Liu, Wuxin; Wang, Shasha; Tan, Mingxiu; Luo, Shaohua; Zhang, Yahui; Yan, Shengxue; Liu, Xin

doi:10.1016/j.jallcom.2022.165436

Cited by 6 publications

(6 citation statements)

References 29 publications

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“…In addition to the development of other suitable cathode materials for anion intercalation, the construction of artificial protective layers on the electrode materials will effectively suppress side reactions and enhance their stability. [76] Wu and co-workers employed a pre-cycling method to construct a layer of artificial solid electrolyte interphase (SEI) on the graphite surface that broadens the stability window of the electrolyte (Figure 4c) and mitigates anion solvation, [52] thereby alleviating electrolyte decomposition and gradually establishing an opti-mal anion transport pathway. At last, the modified graphite exhibits excellent stability with a 96 % retention after 500 cycles at 0.2 A g À 1 at an upper limit of 5.0 V, a considerable improvement compared to the pristine graphite electrode.…”

Section: Interface Designmentioning

confidence: 99%

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

2022

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The working mechanism of a dual-ion battery (DIB) differs from that of a lithium-ion battery (LIB) in that the anions in the electrolyte of the former can be intercalated as well. Researchers have been paying close attention to this device because of its high voltage, low price, and environmental friendliness. However, DIBs are still in their early research stages, and numerous issues need to be addressed and investigated further. Initially, this Review explains how DIBs work in principle and discusses the progress of electrode materials for cathode and anode. Furthermore, since the electrolytes used as the active material, as well as anion, solvent, and additives, have a significant impact on the DIB's capacity and voltage, the current status is also presented in terms of electrolytes, followed by an outlook on confronting the challenges. A comprehensive summary from electrode to electrolyte will guide the development of next-generation DIBs.

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Section: Interface Designmentioning

confidence: 99%

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

2022

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“…And in Table S1 the application of DFOB À does not change charge transfer resistance (R ct ) greatly, which is unlike the results in the literatures about cathode electrolyte interfaces on graphite electrodes. [10] Meanwhile, highest R ct is given by the interface between LiBF 4 solutions and graphite electrodes containing DFOB À . It accords with the results in XRD measurements.…”

Section: Chemsuschemmentioning

confidence: 99%

Difluoro(oxalato)borate's Role in the Intercalation Behavior of Mixed Anions from Sulfolane

Wang

2022

ChemSusChem

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Some previous studies have found the synergistic effect of mixed anions in dual‐ion batteries (DIBs). In this work, both lithium tetrafluoroborate (LiBF4) and lithium difluoro(oxalato)borate (LiDFOB) were dissolved in sulfolane (SL) solvent, and the resultant solutions were applied for DIBs. The storage behavior of mixed anions in natural graphite positive electrodes was investigated. In‐situ X‐ray diffraction measurements revealed both anions could participate in the formation of graphite intercalation compounds. Their evolution followed with the decreasing tendency of discharge capacities as the content of LiDFOB increased in solutions. The exchange of anions was discussed.

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“…For realizing high performances of DIBs, the electrochemical properties of the cathode are of the utmost importance factor, as a suitable cathode material plays a critical role in achieving efficient reversible storage and conversion of large-sized PF 6 – anions . In the CV test of Li//DCG half-cell (Li as the counter electrode, DCG as the cathode) with normal electrolyte (3 M LiPF 6 dissolved in a solvent of ethyl methyl carbonate (EMC) containing 1% TMSP), as shown in Figure a, the DCG cathode exhibits several pairs of oxidation/reduction peaks located at 4.21/4.45 V, 4.37/4.58 V, and 4.72/4.96 V during the anodic/cathodic scans in a high voltage range of 3–5 V. The areas of these peaks at various scan rates are larger than that for graphite (Figure b), revealing better transfer kinetics of DCG cathode for graded intercalation/deintercalation of PF 6 – . The capacitive-controlled ratios of DCG cathode rise with the increasing scanning rates, and an over 90% increase is achieved at scan rates higher than 0.4 mV s –1 (Figure S7).…”

mentioning

confidence: 99%

Realized Record Capacity and Rate Performance of Dual-Carbon Batteries Constructed by Introducing Superhard Nanodiamonds

Sun,

Li,

Liu

et al. 2024

Nano Lett.

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Dual-ion batteries (DIBs) are becoming an important technology for energy storage. To overcome the disadvantages of traditional electrodes and electrolytes, here we assemble a dual-carbon DIB with nanodiamond (ND)-modified crimped graphene (DCG) and electrolyte. The DCG anode and cathode realize high capacities of 1121 mA h g −1 and 149 mA h g −1 , respectively, at 0.1 A g −1 . The corresponding DCG//DCG full cells present a high capacity of 143 mA h g −1 at 1 A g −1 after 3300 cycles, which is superior to most reported results. Achieving these record performances is strongly dependent on the formed DCG electrodes with expanded interlayer spacing and abundant active sites, and NDs dispersed in DCG and electrolytes are very helpful for enhancing the storage of both cations and anions, effectively suppressing the irreversible decomposition of electrolytes. This work breaks through the bottleneck of graphitic-based DIBs, paving the way for realizing highperformance DIBs applied in industry.

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High cycling stability graphite cathode modified by artificial CEI for potassium-based dual-ion batteries

Cited by 6 publications

References 29 publications

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

Difluoro(oxalato)borate's Role in the Intercalation Behavior of Mixed Anions from Sulfolane

Realized Record Capacity and Rate Performance of Dual-Carbon Batteries Constructed by Introducing Superhard Nanodiamonds

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