Graphite as a potassium ion battery anode in carbonate-based electrolyte and ether-based electrolyte

Wang, Liping; Yang, Jingyi; Li, Jie; Chen, Ting; Chen, Shulin; Wu, Zhenrui; Qiu, Jiliang; Wang, Bojun; Gao, Peng; Niu, Xiaobin; Li, Hong

doi:10.1016/j.jpowsour.2018.10.092

Cited by 220 publications

(176 citation statements)

References 36 publications

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“…The cycling performances have also followed the same trend as Coulombic efficiency in these three electrolytes . Another recent study reported superior cycling performance (84% capacity retention over 3500 cycles) of graphite anodes in DME‐based electrolyte . The aforementioned studies have revealed that an appropriate choice of binder and electrolyte can enhance the electrochemical properties of graphite anode tremendously.…”

Section: Anode Materialssupporting

confidence: 52%

Advancements and Challenges in Potassium Ion Batteries: A Comprehensive Review

Rajagopalan

Tang

et al. 2020

Adv Funct Materials

620

401

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Demand for energy in day to day life is increasing exponentially. However, existing energy storage technologies like lithium ion batteries cannot stand alone to fulfill future needs. In this regard, potassium ion batteries (KIBs) that utilize K ions in their charge storage mechanism have attracted considerable attention due to their unique properties and are therefore established as one of the future battery systems of interest among the scientific community. Nevertheless, the development and identification of appropriate electrode materials is very essential for practical applications. This review features the current development in KIBs electrode and electrolyte materials, the present challenges facing this technology (in the commercial aspect), and future aspects to develop fully functional KIBs. The potassium storage mechanisms, evolution of the KIBs, and the advantages and disadvantages of each category of materials are included. Additionally, various approaches to enhance the electrochemical performances of KIBs are also discussed. This review is not only an amalgamation of different viewpoints in literature, but also contains concise perspectives and strategies. Moreover, the potential emergence of a novel class of K‐based dual ion batteries is also analyzed for the first time.

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Section: Anode Materialssupporting

confidence: 52%

Advancements and Challenges in Potassium Ion Batteries: A Comprehensive Review

Rajagopalan

Tang

et al. 2020

Adv Funct Materials

620

401

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“…Compared with Sb 2 O 3 electrode, RGO electrode exhibits the initial reversible specific capacity of 207 mAh g −1 and maintains a reversible specific capacity of 208 mAh g −1 after 50 cycles, owning to its excellent stability and conductivity. The corresponding diffusion coefficient of K-ion are calculated according to Equation (1): [28,42] Therefore, we attempt to hybridize Sb 2 O 3 and RGO to obtain Sb 2 O 3 -RGO composite.…”

Section: Resultsmentioning

confidence: 99%

“…According to previous reports, ether-based electrolyte can remarkably boost the K-ion storage performance, which is due to the formation of robust solid electrolytes interface (SEI) layer and the co-intercalation behavior of K-ion/solvent. [28] Meanwhile, some works involving high concentration ether-based electrolyte have also received attention. [26] Li's group employed porous Bi combined with ether-based electrolyte for KIBs, delivering a superior reversible capacity and long cycle life.…”

mentioning

confidence: 99%

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

Zhuang

Xie

et al. 2019

Advanced Energy Materials

119

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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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“…[7a, 8b,9] EIS analysis was carried out to evaluate the electrode kinetics of KIBs based on RP/C alloying anodes.T he resistance of 1m KFSI/EC + DEC-based KIBs is almost constant after 50 cycles ( Figure 4A)a nd the charge-transfer resistance (R ct )d ominates the overall resistance variation ( Figure 4B). [23] However, ac ontinuous increase in resistance can be found during cycling when using 1m KFSI/DME. In 0.8 m KPF 6 /EC + DEC,e lectrolyte resistance (Re) changes from 42.7 to 68.6 W as the cycle number increases from 5t o 100 ( Figure 4C), suggesting the instability of this electrolyte in working KIBs.I na ddition, galvanostatic intermittent titration technique measurements ( Figure 4D and Figure S16,17) reveal that the K + ion diffusion coefficient in 1m KFSI/EC + DEC is higher than that in 1m KFSI/DME.…”

Section: Angewandte Chemiementioning

confidence: 99%

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Wang

et al. 2019

Angewandte Chemie

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Alloying anodes are promising high‐capacity electrode materials for K‐ion batteries (KIBs). However, KIBs based on alloying anodes suffer from rapid capacity decay due to the instability of K metal and large volume expansion of alloying anodes. Herein, the effects of salts and solvents on the cycling stability of KIBs based on a typical alloying anode such as amorphous red phosphorus (RP) are investigated, and the potassium bis(fluorosulfonyl)imide (KFSI) salt‐based carbonate electrolyte is versatile to achieve simultaneous stabilization of K metal and RP electrodes for highly stable KIBs. This salt‐solvent complex with a moderate solvation energy can alleviate side reactions between K metal and the electrolyte and facilitate K+ ion diffusion/desolvation. Moreover, robust SEI layers that form on K metal and RP electrodes can suppress K dendrite growth and resist RP volume change. This strategy of electrolyte regulation can be applicable to other alloying anodes for high‐performance KIBs.

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Graphite as a potassium ion battery anode in carbonate-based electrolyte and ether-based electrolyte

Cited by 220 publications

References 36 publications

Advancements and Challenges in Potassium Ion Batteries: A Comprehensive Review

Advancements and Challenges in Potassium Ion Batteries: A Comprehensive Review

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

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

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Graphite as a potassium ion battery anode in carbonate-based electrolyte and ether-based electrolyte

Cited by 220 publications

References 36 publications

Advancements and Challenges in Potassium Ion Batteries: A Comprehensive Review

Advancements and Challenges in Potassium Ion Batteries: A Comprehensive Review

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

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

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