Turning commercial MnO2 (≥85 wt%) into high-crystallized K+-doped LiMn2O4 cathode with superior structural stability by a low-temperature molten salt method

Ma, Junfei; Long, Bei; Zhang, Qing; Qian, Yuzhu; Song, Ting; He, Wen; Xiao, Manjun; Liu, Li; Wang, Xianyou; Tong, Yexiang

doi:10.1016/j.jcis.2021.10.113

Cited by 19 publications

(6 citation statements)

References 41 publications

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“…The peak intensities of the products obtained via MSS are higher than those of the products obtained through TDM at the same reaction temperature, indicating that the former has better crystallinity. This is consistent with previous reports in which the powder synthesized from a molten salt has better crystallinity and larger particle size owing to accelerated growth by the salt. ,, For the XRD patterns, the cell parameters are calculated, and the results are presented in Table . The results reveal that ThO 2 NC-A and -B have a cubic crystal structure with an Fm 3̅ m space group.…”

Section: Resultssupporting

confidence: 88%

“…This is consistent with previous reports in which the powder synthesized from a molten salt has better crystallinity and larger particle size owing to accelerated growth by the salt. 21,34,35 For the XRD patterns, the cell parameters are calculated, and the results are presented in Table 1. The results reveal that ThO 2 NC-A and -B have a cubic crystal structure with an Fm3̅ m space group.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Zhang

Qian

Liu

et al. 2022

ACS Appl. Nano Mater.

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In addition to uranium, thorium is a vital nuclear element that has broad potential for future nuclear energy applications. Herein, we report the synthesis of cubic structured ThO2 nanocrystals (NCs) based on the decomposition of their nitrate salt in air and in a molten salt medium. Both the processes yield pure ThO2 NCs with average sizes of <100 nm. The ThO2 NCs synthesized in the molten salt medium exhibit better crystallinity and a larger average size of ∼75.1 nm with a narrow size distribution owing to the high-temperature liquid growth environment. The ceramic sintered from the salt-derived ThO2 NCs exhibits a considerably higher relative density of 94.6% and similar thermal properties compared with the ceramic fabricated from fine nanopowders (<10 nm) obtained from direct thermolysis of metal nitrate. This study shows that thermal decomposition in a molten salt medium could be an efficient method for producing highly crystalline metal-oxide NCs of thorium-based fuels used in nuclear energy applications.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Zhang

Qian

Liu

et al. 2022

ACS Appl. Nano Mater.

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“…Electrochemical tests showed that the cycling performance of the material improved significantly with increasing Co 3+ content. In addition, Ni, 123 Cr, 124 and Zn, 125 K, 126 Nd 127 and Sc 128 metal cations doping can also improve the performance of LMO-based lithium-ion battery cathode materials.…”

Section: Modification Of Limn 2 O 4 Cathode Materialsmentioning

confidence: 99%

Research Development on Spinel Lithium Manganese Oxides Cathode Materials for Lithium-Ion Batteries

Zhang,

Zhou

et al. 2023

J. Electrochem. Soc.

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Spinel LiMn2O4 (LMO) is a cathode material that features 3D Li+ diffusion channels, and it offers a range of benefits including low cost, non-toxicity, environmental friendliness, high safety, and excellent rate performance. Consequently, it has become a popular cathode material for lithium-ion batteries, having gained practical application. However, the cycling performance of LMO is still limited by problems such as Jahn-Teller distortion and Mn dissolution. In recent years, researchers have proposed various preparation and modification methods to address these problems and achieve wider commercialization of LMO cathode materials. This paper introduces the spinel structure of LMO and its degradation mechanisms, listing several common methods for synthesizing LMO cathode materials and modification approaches aimed at improving cyclic stability.

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“…The employment of Ni doping still did not bring a satisfying result (100 cycles) . In fact, Li site dopings with Na + or K + can improve the structural stability of layered cathode materials (LiMn 2 O 4 , LiNi x Co y Mn z O 2 et al). − Inspired by this, this work investigates the employment of K + doping as an effective method to elevate the structural reversibility of γ-LiV 2 O 5 during cycles. Specifically, we convert a commercial V 2 O 5 into γ-LiV 2 O 5 by a low-temperature molten salt method.…”

Section: Introductionmentioning

confidence: 99%

In Situ K Doped γ-LiV₂O₅ as Long-Life Anode and Cathode for Lithium Ion Battery

Chen

Zhang

et al. 2022

ACS Appl. Energy Mater.

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Based on the reaction process (γ′-is potential anode and cathode in a lithium ion battery. However, its poor structural stability during lithiation/delithiation results in unsatisfactory cyclic life. This work reports a low-temperature molten salt method to prepare in situ K doped γ-LiV 2 O 5 . With the as-prepared electrode acting as both anode (233 mAh g −1 after 2400 cycles at 1 A g −1 ) and cathode (128 mAh g −1 after 888 cycles at 0.2 A g −1 ), experimental results reveal that the K + doping distinctly improves structural reversibility, demonstrating the superior electrochemical properties of γ-LiV 2 O 5 for becoming an outstanding candidate in lithium ion batteries. KEYWORDS: γ-LiV 2 O 5 , in situ K + doping, anode and cathode, low-temperature molten salt method, long cyclic life

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Turning commercial MnO2 (≥85 wt%) into high-crystallized K+-doped LiMn2O4 cathode with superior structural stability by a low-temperature molten salt method

Cited by 19 publications

References 41 publications

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Research Development on Spinel Lithium Manganese Oxides Cathode Materials for Lithium-Ion Batteries

In Situ K Doped γ-LiV₂O₅ as Long-Life Anode and Cathode for Lithium Ion Battery

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Turning commercial MnO2 (≥85 wt%) into high-crystallized K+-doped LiMn2O4 cathode with superior structural stability by a low-temperature molten salt method

Cited by 19 publications

References 41 publications

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Research Development on Spinel Lithium Manganese Oxides Cathode Materials for Lithium-Ion Batteries

In Situ K Doped γ-LiV2O5 as Long-Life Anode and Cathode for Lithium Ion Battery

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Product

Resources

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In Situ K Doped γ-LiV₂O₅ as Long-Life Anode and Cathode for Lithium Ion Battery