New spinel high-entropy oxides (FeCoNiCrMnXLi)3O4 (X = Cu, Mg, Zn) as the anode material for lithium-ion batteries

Duan, Chanqin; Tian, Kanghui; Li, Xinglong; Wang, Dan; Sun, Hongyu; Zheng, Runguo; Wang, Zhiyuan; Liu, Yanguo

doi:10.1016/j.ceramint.2021.08.091

Cited by 82 publications

(66 citation statements)

References 45 publications

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“…At a rate of C/5, we observed excellent stability for 100 reversible cycles (Figure 5F), showcasing the strong potential of the senary HEO as a practical anode choice for LIB applications. The overall electrochemical performance of our senary HEO is comparable to the best reported values from HEOs synthesized by other methods in the literature (Table S1, Supporting Information), [7,25,44,[46][47][48][49][50][51] which confirms the desired material quality by our approach.…”

Section: Introductionsupporting

confidence: 82%

Rapid Synthesis of High‐Entropy Oxide Microparticles

Dong

Hong

Gao

et al. 2022

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High‐entropy nanoparticles have received notable attention due to their tunable properties and broad material space. However, these nanoparticles are not suitable for certain applications (e.g., battery electrodes), where their microparticle (submicron to micron) counterparts are more preferred. Conventional methods used for synthesizing high‐entropy nanoparticles often involve various ultrafast shock processes. To increase the size thereby achieving high‐entropy microparticles, longer reaction time (e.g., heating duration) is usually used, which may also lead to undesired particle overgrowth or even densified microstructures. In this work, an approach based on Joule heating for synthesizing high‐entropy oxide (HEO) microparticles with uniform elemental distribution is reported. In particular, two key synthesis conditions are identified to achieve high‐quality HEO microparticles: 1) the precursors need to be loosely packed to avoid densification; 2) the heating time needs to be accurately controlled to tens of seconds instead of using milliseconds (thermal shock) that leads to nanoparticles or longer heating duration that forms bulk structures. The utility of the synthesized HEO microparticles for a range of applications, including high‐performance Li‐ion battery anode and water oxidation catalyst. This study opens up a new door toward synthesizing high‐entropy microparticles with high quality and broad material space.

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Section: Introductionsupporting

confidence: 82%

Rapid Synthesis of High‐Entropy Oxide Microparticles

Dong

Hong

Gao

et al. 2022

Small

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“…1c), which is much smaller than that of the reported HEOs. 40–44 Moreover, small particle sizes will produce a large surface area, which will not only increase the number of active sites of the reaction, but will also contribute to rapid electron conduction. 45 Furthermore, HRTEM characterization (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…However, up to now, only a small number of HEO catalysts have been reported since the complex metal elemental compositions of HEOs with different physicochemical properties easily cause phase separation. Researchers have tried various methods (flame spray pyrolysis, 40 nebulized spray pyrolysis, 41 reverse co-precipitation, 42 solvothermal synthesis, 38 and solid phase sintering methods 43,44 ) to prepare HEOs and explore their OER catalytic performance. However, most of the preparation processes are relatively complicated or involve a high reaction temperature, resulting in the large particle size of HEOs.…”

Section: Introductionmentioning

confidence: 99%

Nanosized high entropy spinel oxide (FeCoNiCrMn)₃O₄ as a highly active and ultra-stable electrocatalyst for the oxygen evolution reaction

Duan

Wang

et al. 2022

Sustainable Energy Fuels

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“…During the first negative scan, multiple cathodic peaks were observed, which can be attributed to electrolyte decomposition (thus solid electrolyte interphase (SEI) formation), stepwise reduction reactions of the electrodes, and Li 2 O evolution. [ 32,25 ] For 4 M V and 4 M Cu, the major conversion reaction peaks are located at ≈0.3 V, which are clearly shifted negatively for 4 M and 4 M Mg. This indicates that the former two electrodes have higher electroactivity for uptake of Li + .…”

Section: Resultsmentioning

confidence: 99%

Effects of Elemental Modulation on Phase Purity and Electrochemical Properties of Co‐free High‐Entropy Spinel Oxide Anodes for Lithium‐Ion Batteries

Patra

Nguyen

Tsai

et al. 2022

Adv Funct Materials

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High entropy oxide (HEO) is a new class of lithium-ion battery anode with high specific capacity and excellent cyclability. The beauty of HEO lies in the unique tailorable properties with respect to tunable chemical composition, which enables the use of infinite element combinations to develop new electrode materials. This study synthesizes a series of Co-free spinel-type HEOs via a facile hydrothermal method. Based on quaternary medium-entropy (CrNiMnFe) 3 O 4 , the fifth elements of V, Mg, and Cu are added, and their ability to form single-phase HEOs is investigated. It is demonstrated that the chemical composition of HEOs is critical to the phase purity and corresponding charge-discharge performance. The oxygen vacancy concentration seems to be decisive for the rate capability and reversibility of the HEO electrodes. An inactive spectator element is not necessary for achieving high cyclability, given that the phase purity of the HEO is wisely controlled. The single-phase (CrNiMnFeCu) 3 O 4 shows a great high-rate capacity of 480 mAh g −1 at 2000 mA g −1 and almost no capacity decay after 400 cycles. Its phase transition behavior during the lithiation/delithiation process is characterized with operando X-ray diffraction. A (CrNiMnFeCu) 3 O 4 ||LiNi 0.8 Co 0.1 Mn 0.1 O 2 cell is constructed with 590 Wh kg −1 (based on electrode materials) gravimetric energy density.

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New spinel high-entropy oxides (FeCoNiCrMnXLi)3O4 (X = Cu, Mg, Zn) as the anode material for lithium-ion batteries

Cited by 82 publications

References 45 publications

Rapid Synthesis of High‐Entropy Oxide Microparticles

Rapid Synthesis of High‐Entropy Oxide Microparticles

Nanosized high entropy spinel oxide (FeCoNiCrMn)₃O₄ as a highly active and ultra-stable electrocatalyst for the oxygen evolution reaction

Effects of Elemental Modulation on Phase Purity and Electrochemical Properties of Co‐free High‐Entropy Spinel Oxide Anodes for Lithium‐Ion Batteries

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New spinel high-entropy oxides (FeCoNiCrMnXLi)3O4 (X = Cu, Mg, Zn) as the anode material for lithium-ion batteries

Cited by 82 publications

References 45 publications

Rapid Synthesis of High‐Entropy Oxide Microparticles

Rapid Synthesis of High‐Entropy Oxide Microparticles

Nanosized high entropy spinel oxide (FeCoNiCrMn)3O4 as a highly active and ultra-stable electrocatalyst for the oxygen evolution reaction

Effects of Elemental Modulation on Phase Purity and Electrochemical Properties of Co‐free High‐Entropy Spinel Oxide Anodes for Lithium‐Ion Batteries

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Nanosized high entropy spinel oxide (FeCoNiCrMn)₃O₄ as a highly active and ultra-stable electrocatalyst for the oxygen evolution reaction