High-concentration ether-based electrolyte boosts the electrochemical performance of SnS<sub>2</sub>–reduced graphene oxide for K-ion batteries

Xie, Junpeng; Zhu, Yongqian; Zhuang, Ning; Li, Xiaodan; Yuan, Xinran; Li, Jinliang; Hong, Guo; Mai, Wenjie

doi:10.1039/c9ta06418d

Cited by 58 publications

(41 citation statements)

References 58 publications

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“…To further analyze the effect by electrolytes, EIS of batteries using DME‐KFSI‐3, DME‐KFSI‐5, and DME‐KFSI electrolytes are provided, as shown in Figure S11, Supporting Information. The battery using DME‐KFSI‐3 exhibits a larger impedance than others, which is ascribed to the resistance of polarization . With the increase of KFSI's concentration, the impedance decreases rapidly, indicating that the resistance of polarization decreases.…”

Section: Resultsmentioning

confidence: 93%

“…[42] Figure 6e,f shows the cycling performance and corresponding CEs of Sb 2 O 3 -RGO electrode using DME-KFSI-3, DME-KFSI-5, and DME-KFSI electrolytes, respectively. [43] With the increase of KFSI's concentration, the impedance decreases rapidly, indicating that the resistance of polarization decreases. Compared with the low concentration ether-based electrolytes (DME-KFSI-3 and DME-KFSI-5), the battery using high concentration ether-based electrolyte (DME-KFSI) exhibits better cycling performance.…”

Section: Resultsmentioning

confidence: 99%

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K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Zhuang

Xie

et al. 2019

Advanced Energy Materials

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125

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In this work, an ether‐based electrolyte is adopted instead of conventional ester‐based electrolyte for an Sb2O3‐based anode and its enhancement mechanism is unveiled for K‐ion storage. The anode is fabricated by anchoring Sb2O3 onto reduced graphene oxide (Sb2O3‐RGO) and it exhibits better electrochemical performance using an ether‐based electrolyte than that using a conventional ester‐based electrolyte. By optimizing the concentration of the electrolyte, the Sb2O3‐RGO composite delivers a reversible specific capacity of 309 mAh g−1 after 100 cycles at 100 mA g−1. A high specific capacity of 201 mAh g−1 still remains after 3300 cycles (111 days) at 500 mA g−1 with almost no decay, exhibiting a longer cycle life compared with other metallic oxides. In order to further reveal the intrinsic mechanism, the energy changes for K atom migrating from surface into the sublayer of Sb2O3 are explored by density functional theory calculations. According to the result, the battery using the ether‐based electrolyte exhibits a lower energy change and migration barrier than those using other electrolytes for K‐ion, which is helpful to improve the K‐ion storage performance. It is believed that the work can provide deep understanding and new insight to enhance electrochemical performance using ether‐based electrolytes for KIBs.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Zhuang

Xie

et al. 2019

Advanced Energy Materials

Self Cite

125

View full text Add to dashboard Cite

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“…With the increase of the rates, the anodic peak shifts to higher potential range while the cathodic shifts to lower, indicating the existing contribution of surface‐induced capacitive behavior. [ 62 ] According to the power‐law equation describing the relationship between current response ( i ) and sweep rate ( v ), an equation is obtained by transformation as follows [ 63,64 ]

\begin{matrix} i = a v^{b} \end{matrix}

\begin{matrix} \log (i) = b \log (v) + \log (a) \end{matrix}

…”

Section: Resultsmentioning

confidence: 99%

“…For the mechanism of K + storage process, previously reported works have illustrated the structural evolution via ex situ and in situ XRD measurements during patassiation/depotassiation. [12,24,27,33,34,62] However, the phase evolution of polysulfide, in spite of which gives a strong contribution to the capacity, still left weak point. In view of this, to further understand the K + storage process, in situ Raman spectra were performed to investigate the phase evolution of potassium polysulfide.…”

Section: Energy Storage Mechanism Of Sns 2 @C In Sibs and Pibsmentioning

confidence: 99%

Structural Engineering of SnS₂Encapsulated in Carbon Nanoboxes for High‐Performance Sodium/Potassium‐Ion Batteries Anodes

Sun

Dai

et al. 2020

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Conversion-alloying type anode materials like metal sulfides draw great attention due to their considerable theoretical capacity for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). However, poor conductivity, severe volume change, and harmful aggregation of the material during charge/discharge lead to unsatisfying electrochemical performance. Herein, a facile and green strategy for yolk-shell structure based on the principle of metal evaporation is proposed. SnS 2 nanoparticle is encapsulated in nitrogen-doped hollow carbon nanobox (SnS 2 @C). The carbon nanoboxes accommodate the volume change and aggregation of SnS 2 during cycling, and form 3D continuous conductive carbon matrix by close contact. The well-designed structure benefits greatly in conductivity and structural stability of the material. As expected, SnS 2 @C exhibits considerable capacity, superior cycling stability, and excellent rate capability in both SIBs and PIBs. Additionally, in situ Raman technology is unprecedentedly conducted to investigate the phase evolution of polysulfides. This work provides an avenue for facilely constructing stable and high-capacity metal dichalcogenide based anodes materials with optimized structure engineering. The proposed in-depth electrochemical measurements coupled with in situ and ex situ characterizations will provide fundamental understandings for the storage mechanism of metal dichalcogenides.

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“…As shown in Figure , with the concentration increase, the reduction current of KTFSI–G 2 decreased and the reversible capacity of the battery improved. Mai and co‐workers [ 42 ] discovered that high concentration of ether‐based electrolyte could inhibit the growth of needle‐like dendrites and form a stable SEI layer, and effectively improved the performance of the battery.…”

Section: Nonaqueous Electrolyte For Potassium‐ion Batteriesmentioning

confidence: 99%

The Features and Progress of Electrolyte for Potassium Ion Batteries

Liu

Gao

Dai

et al. 2020

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Nowadays, Li‐ion batteries have achieved great success and are widely used in various fields. However, the scarcity and uneven distribution of lithium resources together with the increasing cost may hamper the sustainable development of Li‐ion batteries in the future. Hence, many researchers have turned to potassium ion batteries due to their abundant raw materials, low price, and high energy density. Although great progress has been made in recent years, there are still existing many challenges, especially the severe side reaction between electrolyte and K metal, which leads to an unstable solid–liquid interface and low coulombic efficiency. Hence, an excellent electrolyte may be the key to development of K‐ion batteries in the future. Unfortunately, no systematic research has been conducted to study the electrolyte and its role on the performance yet. In order to compensate for this limitation, in this paper, the status and progress of electrolytes for K‐ion batteries are reviewed, the issues and challenges existing in the development of electrolyte are clarified, and the future development is prospected.

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High-concentration ether-based electrolyte boosts the electrochemical performance of SnS₂–reduced graphene oxide for K-ion batteries

Abstract: To meet the urgent demand for energy storage systems, K-ion batteries (KIBs), with low cost and comparable electrochemical performance, have become one of the most promising alternatives to Li-ion batteries.

Cited by 58 publications

References 58 publications

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Structural Engineering of SnS₂Encapsulated in Carbon Nanoboxes for High‐Performance Sodium/Potassium‐Ion Batteries Anodes

The Features and Progress of Electrolyte for Potassium Ion Batteries

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High-concentration ether-based electrolyte boosts the electrochemical performance of SnS2–reduced graphene oxide for K-ion batteries

Abstract: To meet the urgent demand for energy storage systems, K-ion batteries (KIBs), with low cost and comparable electrochemical performance, have become one of the most promising alternatives to Li-ion batteries.

Cited by 58 publications

References 58 publications

K‐Ion Storage Enhancement in Sb2O3/Reduced Graphene Oxide Using Ether‐Based Electrolyte

K‐Ion Storage Enhancement in Sb2O3/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Structural Engineering of SnS2Encapsulated in Carbon Nanoboxes for High‐Performance Sodium/Potassium‐Ion Batteries Anodes

The Features and Progress of Electrolyte for Potassium Ion Batteries

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Product

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High-concentration ether-based electrolyte boosts the electrochemical performance of SnS₂–reduced graphene oxide for K-ion batteries

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Structural Engineering of SnS₂Encapsulated in Carbon Nanoboxes for High‐Performance Sodium/Potassium‐Ion Batteries Anodes