Fast chargeable P2–K~2/3[Ni1/3Mn2/3]O2 for potassium ion battery cathodes

Nathan, D. Muthu Gnana Theresa; Naveen, Nirmalesh; Park, Woon Bae; Sohn, Kee‐Sun; Pyo, Myoungho

doi:10.1016/j.jpowsour.2019.226992

Cited by 40 publications

(42 citation statements)

References 46 publications

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“…However, Pyo's group soon enough overcame that difficulty via an electrochemical ion‐exchange method of P2‐Na 0.64 Ni 1/3 Mn 2/3 O 2 (NNMO) to prepare a high Ni content P2‐K 2/3 Ni 1/3 Mn 2/3 O 2 (KNMO). [ 69 ] It should be noted that the number of voltage plateaus in KNMO is more than that of NNMO, confirming that vacancy‐ordering is a result of the large ionic radius of K + , which limits the screening of K + ‐K + electrostatic repulsion by oxygen anions. Moreover, the partially reversible phase transition to O2 phase was revealed when the upper cutoff voltage was fixed at 4.8 V accompanied [ 69 ] with poor structure stability.…”

Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

confidence: 96%

“…Fourth, K x MO 2 cathodes usually demonstrate several stepwise voltage variations because the strong repulsive interactions trigger complex phase transitions which is related to various ordered K + /vacancy configurations at different K contents. In comparison with their counterparts in Li and Na systems, [ 16,69 ] this phenomenon is more obvious since the larger sized K + ions lead to a larger distance between oxygen–oxygen, and thereby limit the degree to which oxygen anions can screen the alkali–alkali electrostatic repulsion within the intercalation layers. A typical example is K x CoO 2 with manifested three different K + /vacancy ordering patterns depending on x ranging from 1/2, 4/7 to 2/3.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…[ 69 ] It should be noted that the number of voltage plateaus in KNMO is more than that of NNMO, confirming that vacancy‐ordering is a result of the large ionic radius of K + , which limits the screening of K + ‐K + electrostatic repulsion by oxygen anions. Moreover, the partially reversible phase transition to O2 phase was revealed when the upper cutoff voltage was fixed at 4.8 V accompanied [ 69 ] with poor structure stability. Later on, Myung's group synthesized P2‐K 0.75 Ni 1/3 Mn 2/3 O 2 with the same electrochemical exchange method using P2‐Na 2/3 Ni 1/3 Mn 2/3 O 2 as the starting material.…”

Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

confidence: 99%

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

Zhang

Wei

Dinh

et al. 2020

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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.

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Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

confidence: 96%

Section: Challenges and Perspectivesmentioning

confidence: 99%

Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

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

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“…Conversely, the reversible polymorphic change between the P-and O-type phases of K x TMO 2 during charging and discharging can also deliver a high specific capacity and confer good cycling stability to cells. [61][62][63] Therefore, it is important to investigate P2-and P3-type transition metal oxides as PIB cathodes and unveil the potential of these oxides to increase the electrochemical performance of cells via phase engineering.…”

Section: Npm Of K Cathodesmentioning

confidence: 99%

“…[ 52 ] Other P2‐type layered K x TMO 2 cathode materials, such as K 0.64 Na 0.04 [Ni 1/3 Mn 2/3 ]O 2 , were also explored for PIBs by delaying the P2–O2 polymorphic transition. [ 63 ] In addition to the effects of NPM on the structural design of novel electrode materials, the surface polymorphism of electrodes should be considered to achieve good electrochemical K + ion storage performance. In 2019, a P2‐type K 0.44 Ni 0.22 Mn 0.78 O 2 cathode material was synthesized for PIBs, in which a single solid‐solution process occurred upon K + ion insertion and extraction.…”

Section: Npm Of Reduction Electrodesmentioning

confidence: 99%

Nano Polymorphism‐Enabled Redox Electrodes for Rechargeable Batteries

Mei

Wang

et al. 2020

Advanced Materials

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dimensions of materials are decreased to the nanoscale, the high surface aspect ratio generates additional engineerable space, which enables the polymorphism of nanomaterials. Recently, nano polymorphism (NPM) has been emerging as a topic of interest in the energy storage field, and research is expected to identify and rationally exploit the "processingstructure-properties" relationships of functional materials of interest in the context of the emerging rechargeable battery applications, particularly for cathode and anode materials. To date, the research on the NPM of rechargeable battery electrodes has achieved significant progress. [1-3] Many electrode materials with various polymorphs, such as traditional layered metal oxides and some emerging types of graphene-like nanosized materials, have been intensively investigated for improving the electrochemical performance of batteries. Moreover, the in-depth underlying storage mechanisms of different polymorphs have been fully or partly revealed using advanced in situ characterization techniques. Based on the previously reported theoretical and experimental results, some potential structural Nano polymorphism (NPM), as an emerging research area in the field of energy storage, and rechargeable batteries, have attracted much attention recently. In this review, the recent progress on the composition and formation of polymorphs, and the evolution processes of different redox electrodes in rechargeable metal-ion, metal-air, and metal-sulfur batteries are highlighted. First, NPM and its significance for rechargeable batteries are discussed. Subsequently, the current NPM modulation strategies of different types of representative electrodes for their corresponding rechargeable battery applications are summarized. The goal is to demonstrate how NPM could tune the intrinsic material properties, and hence, improve their electrochemical activities for each battery type. It is expected that the analysis of polymorphism and electrochemical properties of materials could help identify some "processing-structure-properties" relationships for material design and performance enhancement. Lastly, the current research challenges and potential research directions are discussed to offer guidance and perspectives for future research on NPM engineering.

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Fabrication of the Components of K‐Ion Batteries

Hamdani

Bhaskarwar

2020

Potassium‐Ion Batteries

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Fast chargeable P2–K~2/3[Ni1/3Mn2/3]O2 for potassium ion battery cathodes

Cited by 40 publications

References 46 publications

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

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

Nano Polymorphism‐Enabled Redox Electrodes for Rechargeable Batteries

Fabrication of the Components of K‐Ion Batteries

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