A Flexible Potassium-Ion Hybrid Capacitor with Superior Rate Performance and Long Cycling Life

Lang, Jihui; Li, Jingrui; Ou, Xuewu; Zhai, Fan; Shin, Kyungsoo; Tang, Yongbing

doi:10.1021/acsami.9b17635

Cited by 65 publications

(48 citation statements)

References 65 publications

(79 reference statements)

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“…As for MCs and MOs, they have high capacity and it is easy to synthesize. Besides, alloying materials not only possess high theoretical capacity, such as Sb (660 mAh g −1 ) [ 83 ] and Bi (385 mAh g −1 ) [ 83 ], but also can react with K-ion under low potentials (~ 0.1–0.8 V vs. K + /K) [ 72 , 84 – 88 ]. Additionally, similar to MCs and MOs, alloying materials can be prepared by some easy synthesis methods, so it is convenient to obtain the corresponding products [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

et al. 2020

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Potassium ion batteries (PIBs) with the prominent advantages of sufficient reserves and economical cost are attractive candidates of new rechargeable batteries for large-grid electrochemical energy storage systems (EESs). However, there are still some obstacles like large size of K+ to commercial PIBs applications. Therefore, rational structural design based on appropriate materials is essential to obtain practical PIBs anode with K+ accommodated and fast diffused. Nanostructural design has been considered as one of the effective strategies to solve these issues owing to unique physicochemical properties. Accordingly, quite a few recent anode materials with different dimensions in PIBs have been reported, mainly involving in carbon materials, metal-based chalcogenides (MCs), metal-based oxides (MOs), and alloying materials. Among these anodes, nanostructural carbon materials with shorter ionic transfer path are beneficial for decreasing the resistances of transportation. Besides, MCs, MOs, and alloying materials with nanostructures can effectively alleviate their stress changes. Herein, these materials are classified into 0D, 1D, 2D, and 3D. Particularly, the relationship between different dimensional structures and the corresponding electrochemical performances has been outlined. Meanwhile, some strategies are proposed to deal with the current disadvantages. Hope that the readers are enlightened from this review to carry out further experiments better.

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Section: Introductionmentioning

confidence: 99%

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

et al. 2020

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“…It clearly reflects that the CBN/G/AC device presents an outstanding energy and power performance in both RT and LT, which is superior to that of previously reported other PIHCs (Table S6, Supporting Information). [ 55–66 ] Also, it is better than many of SIHCs (Figure S31 and Table S6, Supporting Information). [ 67–72 ] Notably, the performance of CBN/G/AC PIHCs even exceeds some reported LIHCs.…”

Section: Resultsmentioning

confidence: 99%

Besides the Capacitive and Diffusion Control: Inner‐Surface Controlled Bismuth Based Electrode Facilitating Potassium‐Ion Energy Storage

Liu

Xing

Wang

et al. 2021

Adv Funct Materials

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One of the major challenges of potassium‐ion hybrid capacitors (PIHCs) is to explore favorable anode materials with fast reaction kinetics to match the cathodes. Here, an “inner‐surface” controlled electrochemistry mechanism based on bismuth electrode is proposed and in‐depth studied, which is different from the capacitive or diffusion controlled electrode. Such inner‐surface controlled electrochemistry performance gives a high K ion diffusion ability under not only room temperature (RT) but also low temperature (LT). In this study, a kind of conjunct‐like bismuth nanoparticle (CBN) is fabricated to model such an advantage. The CBN anode for PIBs displays ultra‐long cycling stability and excellent rate capability, especially with a reversible capacity of 212.9 mAh g−1 at 30 A g−1 after 5000 cycles under RT. At −20 °C, the CBN anode achieves a capacity of 191.9 mAh g−1 at 10 A g−1 after 10 000 cycles. Coupling with activate carbon cathode, the as‐assembled PIHCs deliver high energy/power densities (111.8 Wh kg−1/412.8 W kg−1 and 29 Wh kg−1/14 312.6 W kg−1), which outperforms those of previously reported PIHCs and other hybrid capacitors. The study provides a new understanding of the energy storage mechanism for bismuth‐based electrodes and accelerates the development of advancing potassium ion storage devices, especially at LT.

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“…Tang and co-workers assembled a flexible potassium-ion capacitor using Sn anode and AC cathode. [137] Duo to the 3D porous structure and high ionic conductivity of the gel polymer electrolyte, the capacitor exhibited excellent cycling stability for 2000 cycles. Furthermore, a pouch K-ion capacitor was also fabricated, which can be charged/discharged for 60 cycles.…”

Section: Activated Carbonmentioning

confidence: 98%

“…Gel polymer electrolyte has also been reported in K‐ion capacitors. Tang and co‐workers assembled a flexible potassium‐ion capacitor using Sn anode and AC cathode [137] . Duo to the 3D porous structure and high ionic conductivity of the gel polymer electrolyte, the capacitor exhibited excellent cycling stability for 2000 cycles.…”

Section: Cathode Materials For Kicsmentioning

confidence: 99%

Emerging Potassium‐ion Hybrid Capacitors

Liu

Chang

et al. 2020

ChemSusChem

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As a new type of capacitor–battery hybrid energy storage device, metal‐ion capacitors have attracted widespread attention because of their high‐power density while ensuring energy density and long lifespan. Potassium‐ion capacitors (KICs) featuring the merits of abundant potassium resources, lower standard electrode potential, and low cost have been considered as potential alternatives to lithium‐/sodium‐ion capacitors. However, KICs still face issues including unsatisfactory reaction kinetics, low energy density, and poor lifetime owing to the large radius of the potassium ion. In this Review, the importance of emerging potassium‐ion capacitor is addressed. The Review offers a brief discussion of the fundamental working principle of KICs, along with an overview of recent advances and achievements of a variety of electrode materials for dual carbon and non‐dual carbon KICs. Furthermore, electrolyte chemistry, binders as well as electrode/electrolyte interface, are summarized. Finally, existing challenges and perspectives on further development of KICs are also presented.

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A Flexible Potassium-Ion Hybrid Capacitor with Superior Rate Performance and Long Cycling Life

Cited by 65 publications

References 65 publications

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

Besides the Capacitive and Diffusion Control: Inner‐Surface Controlled Bismuth Based Electrode Facilitating Potassium‐Ion Energy Storage

Emerging Potassium‐ion Hybrid Capacitors

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