A metal–organic framework-derived pseudocapacitive titanium oxide/carbon core/shell heterostructure for high performance potassium ion hybrid capacitors

Li, Hongxia; Chen, Jiangtao; Zhang, Li; Wang, Kunjie; Zhang, Xu; Yang, Bingjun; Liu, Lingyang; Liu, Weisheng; Yan, Xingbin

doi:10.1039/d0ta04912c

Cited by 46 publications

(24 citation statements)

References 69 publications

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“…The energy density also remains as high as 53.1 Wh kg −1 even at power outputs as high as 22.5 kW kg −1 . The energy and power densities of these PIHCs are superior to most of the reported state‐of‐the‐art PIHCs in Table S4 , Supporting Information, such as CNS//FCDAC, [ 41 ] WS 2 //NCHS, [ 42 ] MoSSe//AC, [ 43 ] KTO//NGC, [ 44 ] Graphite//AC, [ 45 ] Soft carbon//AC, [ 46 ] CoP@rGO//AC, [ 47 ] Ti 3 C 2 //HPAC, [ 48 ] TiO 2 //ZDPC, [ 49 ] MoP@NC‐1//AC, [ 50 ] and CoV 2 O 6 @GO//AC. [ 51 ] In addition, a fully charged NCOP//BCN device can easily light up a blue light‐emitting diode (inset of Figure 5e ), thus demonstrating its application potential.…”

Section: Resultsmentioning

confidence: 99%

Construction of Novel Bimetallic Oxyphosphide as Advanced Anode for Potassium Ion Hybrid Capacitor

Wang

et al. 2022

Advanced Science

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Potassium ion hybrid capacitors (PIHCs) have attracted considerable interest due to their low cost, competitive power/energy densities, and ultra‐long lifespan. However, the more sluggish insertion kinetics of battery‐type anodes than capacitor‐type cathodes in PIHCs seriously limits their practical application. Therefore, developing advanced anodes with high capacitor and suitable K+ intercalation is imperative and significant. A novel core–shell structure of NiCo oxide/NiCo oxyphosphide (NCOP) nanowires are designed and constructed in this study via efficient and facile strategy. Combining the merits of the core–shell structure and the massive active sites in the oxyphosphide layer, the as‐prepared NCOP composites manifest highly reversible capacitors and outstanding rate capability. Meanwhile, the insertion and conversion potassium storage mechanisms of the NCOP are successfully revealed through in situ X‐ray diffraction and density functional theory calculations, respectively. Furthermore, the PIHC was assembled with NCOP anode and borocarbonitride cathode, which displays a large energy density and high‐power density, along with an exceptional capacity retention of ≈90% over 10 000 cycles at 1.0 A g−1. This work provides the anion regulation strategy for modifying the transition metal oxide and constructing the advancing electrode materials for next‐generation energy storage and beyond.

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Section: Resultsmentioning

confidence: 99%

Construction of Novel Bimetallic Oxyphosphide as Advanced Anode for Potassium Ion Hybrid Capacitor

Wang

et al. 2022

Advanced Science

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“…It is also important to explore new strategies for pre-potassiation to work as a secondary potassium source to compensate the initial potassium loss and improve the CE. [143][144][145] The electrolyte is a key component to determine the overall energy density of KICs. Furthermore, new electrolytes and additives with high ionic conductivity and wide stable potential window to form highquality interfaces are undoubtedly necessary.…”

Section: Kineticsmentioning

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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“…4 Recently, potassium-ion based hybrid capacitors (PIHCs) with abundant natural resource, low cost and high performance have attracted intensive interest. [5][6][7][8][9][10] However, the kinetics mismatch between battery-type anodes and capacitor-type cathodes leads to the unsatisfactory behaviours of both devices. Accordingly, it is a crucial issue to explore fast and durable anodes for PIHCs.…”

Section: Introductionmentioning

confidence: 99%

Engineered phase of nickel sulfides inside hairy hollow fibers towards high-performance anodes for flexible potassium ion hybrid capacitors

et al. 2022

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A metal–organic framework-derived pseudocapacitive titanium oxide/carbon core/shell heterostructure for high performance potassium ion hybrid capacitors

Abstract: For the emerging potassium-ion energy storage technology, the major challenge is seeking suitable electrode materials with a robust structure and fast kinetics for the reversible insertion/desertion of potassium ions. Here,...

Cited by 46 publications

References 69 publications

Construction of Novel Bimetallic Oxyphosphide as Advanced Anode for Potassium Ion Hybrid Capacitor

Construction of Novel Bimetallic Oxyphosphide as Advanced Anode for Potassium Ion Hybrid Capacitor

Emerging Potassium‐ion Hybrid Capacitors

Engineered phase of nickel sulfides inside hairy hollow fibers towards high-performance anodes for flexible potassium ion hybrid capacitors

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