High energy K-ion batteries based on P3-Type K0·5MnO2 hollow submicrosphere cathode

Peng, Bo; Li, Yapeng; Gao, Jingyu; Zhang, Fu; Li, Jie; Zhang, Genqiang

doi:10.1016/j.jpowsour.2019.226913

Cited by 61 publications

(56 citation statements)

References 41 publications

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“…Interestingly, unique fullerene‐liked hollow polyhedrons (Figure A 1 –A 4 ) can be observed instead of the solid NiMnO x microspheres. The average diameter of NNMO‐FHP is about 2.5 μm estimated from FESEM images (Figure A 1 , A 2 ), which is slightly smaller than solid NiMnO x microspheres ascribed to the shrink effect upon the high temperature calcination process, (Figure S3, Supporting Information) while TEM images (Figure A 3 , A 4 ) confirm the hollow interior feature. The formation of P2‐type layered oxide structure is verified by X‐ray diffraction (XRD) pattern with Rietveld refinement (Figure S4A and Table S1, Supporting Information), which can be readily indexed to the hexagonal structure with a space group of P 6 3 / mmc .…”

Section: Methodsmentioning

confidence: 97%

Electrochemical Performance Optimization of Layered P2‐Type Na_0.67MnO₂ through Simultaneous Mn‐Site Doping and Nanostructure Engineering

Peng

Sun

Jiao

et al. 2019

Batteries & Supercaps

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Sodium-ion batteries are considered as the most promising candidates for grid-level energy storage applications due to its unique features of much lower cost and comparable energy density to lithium ion batteries. However, searching for suitable cathode materials with high capacity and good cycling stability are still the bottleneck issues due to the involved unmanageable phase transitions and difficult morphology control. Herein, unique fullerene-like hollow polyhedrons of P2-type Na 0.67 Ni 0.15 Mn 0.85 O 2 cathode were successfully synthesized via a facile and scalable self-template strategy, where largely enhanced electrochemical properties can be achieved compared to its bulk counterpart. It can deliver a high specific capacity of 101 mAh g À 1 after 120 cycles at a rate of 100 mA g À 1 , reaching an excellent capacity retention of 96.8 %. The possible origins of the enhanced performance were further analyzed to be the synergistic effect of hollow interior and novel morphology of the polyhedron, leading to well exposed (002) planes, shorter diffusion path and better structural robust. Importantly, the full battery without pre-sodiation treatment could deliver a high energy density of 133.1 Wh kg À 1 based on the total mass of cathode and anode, which sheds a new light for designing high energy density sodium-ion full batteries.

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Section: Methodsmentioning

confidence: 97%

Electrochemical Performance Optimization of Layered P2‐Type Na_0.67MnO₂ through Simultaneous Mn‐Site Doping and Nanostructure Engineering

Peng

Sun

Jiao

et al. 2019

Batteries & Supercaps

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“…who reported P3‐K 0.5 MnO 2 hollow submicron spheres with superior cycling stability (89.1% capacity retention after 400 cycles) thanks to the synergistic interaction between particle size, morphology, and hollow interior. [ 42 ] Especially, the hollow feature in this work is believed to alleviate volume changes and structural stress, in addition to providing a shorter ion diffusion pathway for K + ions.…”

Section: Layered Oxide Cathodes For Potassium Ion Storagementioning

confidence: 99%

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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“…Moreover, it could also increase the complexity and cost for the materials preparation. Some pioneer work have demonstrated that the advanced morphological design could significantly improve Na + intercalation kinetics [31–38] . Very recently, the Guo group [39] designed cathode material with the exposed {010} active facets by multiple‐layer oriented stacking nanosheets in Na[Li 0.05 Ni 0.3 Mn 0.5 Cu 0.1 Mg 0.05 ]O 2 , which largely enhanced the electrochemical performance.…”

Section: Figurementioning

confidence: 99%

Shape‐Induced Kinetics Enhancement in Layered P2‐Na_0.67Ni_0.33Mn_0.67O₂ Porous Microcuboids Enables High Energy/Power Sodium‐Ion Full Battery

Peng

Sun

Zhao

et al. 2020

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P2‐type Na0.67Ni0.33Mn0.67O2 cathode material generally suffers from poor cycling and rate performance due to fiercely phase variation and low Na+ diffusion kinetic. Although efforts have been made to promote the electrochemical properties through ionic doping, the specific capacity reduction in most cases since the doped cations are electrochemical inactive cannot be neglected. Recently, some pioneering work have demonstrated that the advanced morphological design could significantly improve Na+ intercalation kinetics. But rare researches devote to improving the electrochemical performance on P2‐type Na0.67Ni0.33Mn0.67O2 through morphological manipulation. Herein, unique one‐dimensional P2‐type Na0.67Ni0.33Mn0.67O2 porous microcuboids with abundantly exposed {010} facets have been well designed via a simple one‐pot strategy. Due to the reasonable material design, it demonstrates unprecedented electrochemical performances. Particularly, it can deliver high rate performance with 122.1 mAh g−1 at 5 C, extraordinary cycle life with a capacity retention of 94.6 % after 1500 cycles at 5 C. More importantly, prototype sodium ion full cell could achieve state‐of‐the‐art power density of 1383.1 W kg−1 with high energy density of 84.7 Wh kg−1. The underlying mechanism of enhanced electrochemical properties of this well‐designed material has been deciphered through dynamic analysis, in‐situ X‐ray diffraction and structural analysis after cycling.

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High energy K-ion batteries based on P3-Type K0·5MnO2 hollow submicrosphere cathode

Cited by 61 publications

References 41 publications

Electrochemical Performance Optimization of Layered P2‐Type Na_0.67MnO₂ through Simultaneous Mn‐Site Doping and Nanostructure Engineering

Electrochemical Performance Optimization of Layered P2‐Type Na_0.67MnO₂ through Simultaneous Mn‐Site Doping and Nanostructure Engineering

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

Shape‐Induced Kinetics Enhancement in Layered P2‐Na_0.67Ni_0.33Mn_0.67O₂ Porous Microcuboids Enables High Energy/Power Sodium‐Ion Full Battery

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High energy K-ion batteries based on P3-Type K0·5MnO2 hollow submicrosphere cathode

Cited by 61 publications

References 41 publications

Electrochemical Performance Optimization of Layered P2‐Type Na0.67MnO2 through Simultaneous Mn‐Site Doping and Nanostructure Engineering

Electrochemical Performance Optimization of Layered P2‐Type Na0.67MnO2 through Simultaneous Mn‐Site Doping and Nanostructure Engineering

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

Shape‐Induced Kinetics Enhancement in Layered P2‐Na0.67Ni0.33Mn0.67O2 Porous Microcuboids Enables High Energy/Power Sodium‐Ion Full Battery

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Electrochemical Performance Optimization of Layered P2‐Type Na_0.67MnO₂ through Simultaneous Mn‐Site Doping and Nanostructure Engineering

Electrochemical Performance Optimization of Layered P2‐Type Na_0.67MnO₂ through Simultaneous Mn‐Site Doping and Nanostructure Engineering

Shape‐Induced Kinetics Enhancement in Layered P2‐Na_0.67Ni_0.33Mn_0.67O₂ Porous Microcuboids Enables High Energy/Power Sodium‐Ion Full Battery