Highly stable P′3-K0.8CrO2 cathode with limited dimensional changes for potassium ion batteries

Naveen, Nirmalesh; Han, Su Cheol; Singh, Satendra Pal; Ahn, Docheon; Sohn, Kee‐Sun; Pyo, Myoungho

doi:10.1016/j.jpowsour.2019.05.017

Cited by 55 publications

(56 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, Pyo's group prepared a P′3‐phase K 0.8 CrO 2 with a space group of C2/m by a simple solid‐state synthesis. [ 31 ] The structural transition of P′3 ( x = 0.8–0.72) → P3 ( x = 0.72–0.71) → P3/P′3 ( x = 0.71–0.67) → P′3 ( x = 0.67–0.48) in the K + extraction and P′3 ( x = 0.48–0.68) → P′3/P3 ( x = 0.68–0.72) → P3 ( x = 0.72–0.73) → P′3 ( x = 0.73–0.77) → P′3/O′3 ( x = 0.77–0.87) → O′3 ( x = 0.87–0.90) in the K + insertion were clearly revealed by in situ XRD. Furthermore, K diffusion in P′3 is much easier than that in O′3 because the K migration process via pseudo‐tetrahedral sites in O′3 requires higher energy.…”

Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

confidence: 99%

“…[ 95 ] Thus, the electrochemical procedure of K + insertion is accompanied by the first‐order transition at particular K contents, which is also observed in other layered oxides such as K x MnO 2 [ 39 ] and K x CrO 2 . [ 31 ] The presence of ordered intermediate phases caused by K + /vacancy ordering rearrangement naturally induces additional activation energy barrier for K + mobility and reduces the dimensionality of ionic transport as well as capacity stability during cycling. [ 96,97 ] Therefore, suppressing intercalation ordering is indispensable for tailoring the materials to improve K diffusivity and rate capability.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…The digit 2 or 3 indicates the quantity of unique interlayers surrounded by different oxide layers. [ 11 ] Furthermore, the use of prime (′) between the alphabet and digit indicates a phase distortion from the hexagonal symmetry, such as P′3‐type K 0.8 CrO 2 [ 31 ] with a monoclinic lattice (S.G., C2/m) and P′2‐type K 0.3 MnO 2 [ 15 ] with an orthorhombic lattice (S.G., Cmcm).…”

Section: Structural Classificationmentioning

confidence: 99%

See 2 more Smart Citations

Layered Oxide Cathode for Potassium‐Ion Battery: Recent Progress and Prospective

Zhang

Wei

Dinh

et al. 2020

Small

View full text Add to dashboard Cite

Rechargeable potassium‐ion batteries (KIBs) have demonstrated great potential as alternative technologies to the currently used lithium‐ion batteries on account of the competitive price and low redox potential of potassium which is advantageous to applications in the smart grid. As the critical component determining the energy density, appropriate cathode materials are of vital need for the realization of KIBs. Layered oxide cathodes are promising candidates for KIBs due to high reversible capacity, appropriate operating potential, and most importantly, facile and easily scalable synthesis. In light of this trend, the recent advancements and progress in layered oxides research for KIBs cathodes, covering material design, structural evolution, and electrochemical performance are comprehensively reviewed. The structure–performance correlation and some effective optimization strategies are also discussed. Furthermore, challenges and prospects of these layered cathodes are included, with the purpose of providing fresh impetus for future development of these materials for advanced energy storage systems.

show abstract

Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

confidence: 99%

Section: Challenges and Perspectivesmentioning

confidence: 99%

Section: Structural Classificationmentioning

confidence: 99%

See 1 more Smart Citation

Layered Oxide Cathode for Potassium‐Ion Battery: Recent Progress and Prospective

Zhang

Wei

Dinh

et al. 2020

Small

View full text Add to dashboard Cite

show abstract

“…In addition, Pyo et al. reported a novel reaction of the P′3‐K 0.8 CrO 2 cathode [147] . As exhibited in Figure 14 d, pristine K 0.8 CrO 2 first returned to P′3‐K 0.48 CrO 2 during the first charging cycle, and finally generated a new O′3‐K 0.9 CrO 2 phase in subsequent discharging cycles.…”

Section: Cathode Materialsmentioning

confidence: 92%

Section: Cathode Materialsmentioning

confidence: 99%

Post‐Lithium‐Ion Battery Era: Recent Advances in Rechargeable Potassium‐Ion Batteries

Wang

Ang

Yang

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

Lithium shortage and the growing demand for electricity storage has encouraged researchers to look for new alternative energy‐storage materials. Due to abundant potassium resources, similar redox potential to lithium metal, and low cost, potassium‐ion batteries (PIBs), as one of the promising alternatives, have been applied in energy‐storage research recently. However, PIBs do not have adequate competition in their electrochemical efficiency because the molar volume of potassium ions is higher than those in lithium and sodium ions. Therefore, for better application and development of PIBs, finding suitable anode and cathode materials is currently the most important task. The latest developments in electrode materials for PIBs have been outlined in depth in this review. It focuses on the structural design and synthetic methods for novel electrode materials, ingenious optimization and tuning strategies, and explains the intrinsic reaction mechanism. The effects of organic electrolytes and aqueous electrolytes on battery systems are compared and clarified. Finally, theoretical and viable insights are given to the challenges posed by the creation and practical application of PIBs in the future.

show abstract

In Situ Structure Modulation of Cathode‐Electrolyte Interphase for High‐Performance Potassium‐Ion Battery

Li,

Gu,

Cui

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Manganese‐based layered oxide cathodes, particularly KxMnO2 (KMO), have shown great potential in potassium‐ion batteries (PIBs) due to their low cost, high theoretical capacities, and excellent thermal stability. However, Jahn‐Teller distortion, manganese dissolution, and interface instability of electrode/electrolyte lead to structural instability and performance decay. Here, lithium difluoro(oxalate) borate (LiDFOB) is introduced as an electrolyte additive to improve the electrochemical performance of P3‐type KMO. LiDFOB creates a uniform, thin, and robust cathode‐electrolyte interphase layer on the cathode surface, enhancing reaction kinetics, preventing manganese dissolution, and stabilizing the structure. The P3‐KMO cathode with LiDFOB in the basic electrolyte exhibits significantly improved electrochemical performance, such as a remarkable Coulombic efficiency of ≈99.5% and high capacity retention of 78.6% after 300 cycles at 100 mA g−1. Moreover, the full cell of P3‐KMO||soft carbon demonstrates satisfactory specific capacity and energy density. This study emphasizes the importance of interface chemistry for PIBs.

show abstract

Highly stable P′3-K0.8CrO2 cathode with limited dimensional changes for potassium ion batteries

Cited by 55 publications

References 37 publications

Layered Oxide Cathode for Potassium‐Ion Battery: Recent Progress and Prospective

Layered Oxide Cathode for Potassium‐Ion Battery: Recent Progress and Prospective

Post‐Lithium‐Ion Battery Era: Recent Advances in Rechargeable Potassium‐Ion Batteries

In Situ Structure Modulation of Cathode‐Electrolyte Interphase for High‐Performance Potassium‐Ion Battery

Contact Info

Product

Resources

About