Achieving High‐Performance 3D K+‐Pre‐intercalated Ti3C2Tx MXene for Potassium‐Ion Hybrid Capacitors via Regulating Electrolyte Solvation Structure

Zhao, Shuoqing; Liu, Zhichao; Xie, Guanshun; Guo, Xin; Guo, Zhen; Song, Fei; Li, Guohao; Chen, Chi; Xie, Xiuqiang; Zhang, Nan; Sun, Bing; Guo, Shaojun; Wang, Guoxiu

doi:10.1002/anie.202112090

Cited by 54 publications

(32 citation statements)

References 59 publications

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“…Besides, Zhao et al prepared 3D K + -Ti 3 C 2 T x assembled from a large number of Ti 3 C 2 T x ultrathin nanosheets by electrostatic flocculation followed by freeze-drying and vacuum drying (Figure 28a). [475] The corresponding SEM images of 2D Ti 3 C 2 T x , 3D Ti 3 C 2 T x , and 3D K + -Ti 3 C 2 T x were shown in Figure 28b-d, respectively. The 3D K + -Ti 3 C 2 T x had a unique antiagglomeration porous skeleton, which was beneficial to the impregnation of electrolyte and shortening the K + transport pathway, thereby significantly enhancing the potassium storage capacity.…”

Section: D Mxenesmentioning

confidence: 99%

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Exploring 2D Energy Storage Materials: Advances in Structure, Synthesis, Optimization Strategies, and Applications for Monovalent and Multivalent Metal‐Ion Hybrid Capacitors

Zheng

et al. 2022

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utilization of environmentally friendly renewable energy sources, such as solar energy, wind energy, and tidal energy. However, these renewable energy sources are intermittent in nature, which makes them unable to provide a stable energy supply. Therefore, energy storage devices play an integral role in setting up renewable energy systems. [1] At present, electrochemical energy storage (EES) technologies are the most commonly used due to high energy conversion efficiency, wide range of energy and power densities, relatively long lifetime, and low maintenance costs, among which lithium-ion batteries (LIBs) and supercapacitors (SCs) are considered to be the promising two. [2,3] LIBs, which have occupied half of the market of EES devices since their successful commercialization more than 30 years ago, have the advantages of high energy density, stable performance, and moderate cost, but their low power density and poor cycle performance are detrimental to fast and longterm energy storage. [4][5][6] By contrast, SCs, another excellent energy storage device, have the ability to store and release energy quickly and has an extremely long cycle life and good safety. The very limited energy density however greatly increases the number of equipment required to store the same energy, thus making SCs undesirable to meet the actual demand for high energy storage. [7][8][9] Consequently, in order to assist in realizing the vision of replacing nonrenewable fossil energy with environmentally friendly renewable energy, EES devices that can concurrently provide good energy density and high power performance are urgently needed.As a new type of EES device emerging after metal-ion batteries (MIBs) and SCs, metal-ion hybrid capacitors (MHCs) blessed with fabulous power performance, decent energy density, and remarkable cycle stability are considered to be one of the most prospective EES devices. [10] In 2001, the first MHC, using activated carbon (AC) as the cathode and nanostructured Li 4 Ti 5 O 12 (LTO) as the anode, was constructed by Amatucci et al., which possessed an energy density as high as 20 Wh kg −1 , about threefold than that of traditional SCs, showing promising rate capability in the meanwhile. [11] ThisThe design and development of advanced energy storage devices with good energy/power densities and remarkable cycle life has long been a research hotspot. Metal-ion hybrid capacitors (MHCs) are considered as emerging and highly prospective candidates deriving from the integrated merits of metal-ion batteries with high energy density and supercapacitors with excellent power output and cycling stability. The realization of high-performance MHCs needs to conquer the inevitable imbalance in reaction kinetics between anode and cathode with different energy storage mechanisms. Featured by large specific surface area, short ion diffusion distance, ameliorated in-plane charge transport kinetics, and tunable surface and/or interlayer structures, 2D nanomaterials provide a promising platform for manufacturing battery-type electrod...

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Section: D Mxenesmentioning

confidence: 99%

Section: D Tmdcsmentioning

confidence: 99%

Exploring 2D Energy Storage Materials: Advances in Structure, Synthesis, Optimization Strategies, and Applications for Monovalent and Multivalent Metal‐Ion Hybrid Capacitors

Zheng

et al. 2022

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“…Zhao et al designed a 3D K + -pre-intercalated Ti 3 C 2 T x MXene by alkali treatments to store K + ions. [167] The assembled 3D K + -Ti 3 C 2 T x //AC potassium ion hybrid capacitors (PICs) achieved a high energy density of 163 Wh kg −1 and a long-term cycling (up to 10 000 cycles), with the formation of a thin and inorganic-rich SEI in 4 m KFSI electrolytes. Owing to their fast redox kinetics, MXenes can also be used as cathodes of MICs.…”

Section: Applications In Metal-ion Batteriesmentioning

confidence: 99%

Roles of Metal Ions in MXene Synthesis, Processing and Applications: A Perspective

Tao

Shang

et al. 2022

Advanced Science

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With a decade of effort, significant progress has been achieved in the synthesis, processing, and applications of MXenes. Metal ions play many crucial roles, such as in MXene delamination, structure regulation, surface modification, MXene composite construction, and even some unique applications. The different roles of metal ions are attributed to their many interactions with MXenes and the unique nature of MXenes, including their layered structure, surface chemistry, and the existence of multi‐valent transition metals. Interactions with metal ions are crucial for the energy storage of MXene electrodes, especially in metal ion batteries and supercapacitors with neutral electrolytes. This review aims to provide a good understanding of the interactions between metal ions and MXenes, including the classification and fundamental chemistry of their interactions, in order to achieve their more effective utilization and rational design. It also provides new perspectives on MXene evolution and exfoliation, which may suggest optimized synthesis strategies. In this respect, the different effects of metal ions on MXene synthesis and processing are clarified, and the corresponding mechanisms are elaborated. Research progress on the roles metal ions have in MXene applications is also introduced.

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“…Zhao et al observed that rational regulation of the solvation structure in the high-concentrated ether-based electrolyte contributed to produce a thin and inorganic-rich SEI layer, which ensured the interfacial stability and efficient reaction kinetics. [208] Moreover, superconcentrated electrolyte has the advantages of hindering the dissolution of the transition metal, the corrosion of the Al current collector and exfoliation of the graphite layers. [209][210][211] However, different from graphite anodes, Katorova et al found no significant differences in the discharge capacity, cycling stability and Coulombic efficiency for the carbon anodes using differentconcentration ether-based electrolytes.…”

Section: Potassium Saltmentioning

confidence: 99%

Advances in Carbon Materials for Sodium and Potassium Storage

Liu

Wang

et al. 2022

Adv Funct Materials

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Over the past decades, ground‐breaking techniques and transformative progress have been achieved on exploring alternative battery candidates beyond lithium‐ion batteries, among which sodium‐/potassium‐ion batteries (SIBs/PIBs) are receiving rapidly increased attention. Great efforts have been devoted to developing verified anode materials. Carbon materials take the leading position because of their abundance, low‐cost, environmental friendless, and commercial potential. While it is easy to understand which specific carbon material exhibits outstanding performance, the understanding of electrochemical reaction mechanisms, the structure–performance relation, and the interfacial properties of carbon anodes are rather difficult. It is urgently required to comprehensively summarize and further compare these fundamental issues, but it is still insufficient. This review concentrates on recent progress of carbon materials for SIBs and PIBs, and at the beginning summarizes the fabrication and characterization of different carbon allotropes, then fundamentally compares the ion storage mechanisms and interfacial chemistries. Furthermore, the relationship between the mechanism‐oriented and interface‐correlated performance and material optimization strategies is established. Finally, critical challenges and future developments of carbon anodes for the practical realization of SIBs/PIBs are proposed. This review gives a comprehensive summary and perspective from mechanisms to material design, offering a reliable guidance of carbon materials for SIBs and PIBs.

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Achieving High‐Performance 3D K⁺‐Pre‐intercalated Ti₃C₂T_x MXene for Potassium‐Ion Hybrid Capacitors via Regulating Electrolyte Solvation Structure

Cited by 54 publications

References 59 publications

Exploring 2D Energy Storage Materials: Advances in Structure, Synthesis, Optimization Strategies, and Applications for Monovalent and Multivalent Metal‐Ion Hybrid Capacitors

Exploring 2D Energy Storage Materials: Advances in Structure, Synthesis, Optimization Strategies, and Applications for Monovalent and Multivalent Metal‐Ion Hybrid Capacitors

Roles of Metal Ions in MXene Synthesis, Processing and Applications: A Perspective

Advances in Carbon Materials for Sodium and Potassium Storage

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