Heat‐Treatment‐Assisted Molten‐Salt Strategy to Enhance Electrochemical Performances of Li‐Rich Assembled Microspheres by Tailoring Their Surface Features

Li, Baoyun; Zhang, Dan; Jiang, Fan; Chen, Dandan; Ge, Yongxin; Li, Guangshe

doi:10.1002/chem.201804632

Cited by 11 publications

(3 citation statements)

References 51 publications

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“…The (108)/(110) and (006)/(102) doublets were obviously spitted, indicating that these cathodes had ordered structure. 16,17 Rietveld refinement was carried out based on the space group R 3 ¯m and chemical compositions determined from the ICP (Table I). The pre-calculated pattern matched well with the observed one.…”

Section: Resultsmentioning

confidence: 99%

Substantial Doping Engineering in Layered LiNi_0.5+xCo_0.2−xMn_0.3O₂ Materials for Lithium-Ion Batteries

Zhang

et al. 2021

J. Electrochem. Soc.

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To reduce cost while maintaining the specific capacity of LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode, we systematically explore the effect of Ni substitution for Co on the structure, electrochemical performance, and thermal stability of NCM523, LiNi0.55Co0.15Mn0.3O2 (NCM5.5:1.5:3), and LiNi0.6Co0.1Mn0.3O2 (NCM613) cathodes in this study. These materials were investigated by scanning electron microscopy, particle-size analysis, Rietveld refinement of X-ray diffraction, inductively coupled plasma-atomic emission spectroscopy, X-ray photoelectron spectroscopy, charge-discharge testing, electrochemical impedance spectroscopy, the galvanostatic intermittent titration technique, and differential scanning calorimetry. The results indicate that a decrease in the Co content of NCM523 lead to an increase in the voltage platform and discharge capacity, which contributes to the improvement of the energy density. However, the initial efficiency, cycle performance, rate capability, and low-temperature performance was found to slightly decrease. This behavior can be attributed to the lower Co content yielding higher degrees of Li+/Ni2+ disordering, higher resistance, lower Li+ diffusivity, and higher activation energy (E a ). Moreover, as the Co content decreased, the thermal stability of NCM523 was slightly decreased. Considering both cost and performance, NCM5.5:1.5:3 and NCM613 materials deserve to be considered as the preferred next-generation materials.

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Section: Resultsmentioning

confidence: 99%

Substantial Doping Engineering in Layered LiNi_0.5+xCo_0.2−xMn_0.3O₂ Materials for Lithium-Ion Batteries

Zhang

et al. 2021

J. Electrochem. Soc.

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“…Proses Leblanc ini didasarkan pada pemanggangan kerak garam (115)(116)(117)(118)(119)(120)(121)(122)(123)(124) dengan karbon dan gamping di dalam tanur putar dan sesudah itu dilakukan proses pengerasan hasilnya dengan air. Produk kasar dari reaksi ini dinamakan black ash (abu hitam).…”

Section: B Proses Leblancunclassified

Natrium Karbonat : Termodinamika dan Transport Ion

Jumalia¹,

Zainul²

2019

Preprint

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Natrium Karbonat merupakan salah satu garam natrium dari asam karbonat yang bersifat higroskospis. Natrium Karbonat biasanya dapat digunakan dalam pembuatan kaca. Sintesis Natrium karbonat dapat dilakukan dengan proses Leblanc dan Solvay. Tujuan dari review ini untuk mengetahui termodinamika dan transport ion pada senyawa natrium karbonat. Metode yang digunakan yaitu studi literatur menggunakan endnote X7, pemodelan komputasi menggunakan ChemOffice 15.0, dan perhitungan matematis. Metode dengan studi literatur dapat dilihat pada fishbone. Metode menggunakan ChemOffice 15.0, pada minimize energy dihasilkan energi -271.9263 kcal/mol pada suhu optimum dengan bend nya yaitu 4.4521. Pada metode perhitungan matematis ada beberapa parameter transport ion yang dapat dihitung yaitu konduktivitas, viskositas, mobilitas ion, dan kecepatan hanyut. Parameter ini selain didapatkan dari perhitungan matematis juga dari data hasil review jurnal penelitian yang berkaitan. Hasil perhitungan pada konduktivitas yaitu 0,07905 x 10-8 mho/cm. Nilai viskositas natrium karbonat yaitu . Kelarutan natrium karbonat anhidrat pada suhu 20OC yaitu 2.533 g/cm3 .Sifat termokimia pada natrium karbonat ini yaitu Cp, So, ΔfHo ,ΔfG, masing-masing bernilai 109,2 J/mol·K; 136,4 J/mol·K; -1131 kJ/mol ; -1047,5 kJ/mol.

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“…Li et al. used heat treatment assisted molten salt strategy to improve the electrochemical performance of Li‐rich Mn‐based layered oxide (LMRO) assembled microspheres [45] . Previous results have shown that molten salt synthesis of spinel leads to controlled growth in size and shape of nano materials [46] .…”

Section: Introductionmentioning

confidence: 99%

Molten‐Salt‐Assisted Annealing for Making Colloidal ZnGa₂O₄:Cr Nanocrystals with High Persistent Luminescence

Srivastava

Gupta

Mohan

et al. 2021

Chemistry A European J

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Persistent luminescent nanocrystals (PLNCs) in the sub‐10 nm domain are considered to be the most fascinating inventions in lighting technology owing to their excellent performance in anti‐counterfeiting, luminous paints, bioimaging, security applications, etc. Further improvement of persistent luminescence (PersL) intensity and lifetime is needed to achieve the desired success of PLNCs while keeping the uniform sub‐10 nm size. In this work, the concept of molten salt confinement to thermally anneal as‐synthesized ZnGa2O4:Cr3+ (ZGOC) colloidal NCs (CNCs) in a molten salt medium at 650 °C is introduced. This method led to significantly monodispersed and few agglomerated NCs with a much improved photoluminescence (PL) and PersL intensity without much growth in the size of the pristine CNCs. Other strategies such as i) thermal annealing, ii) overcoating, and iii) the core–shell strategy have also been tried to improve PL and PersL but did not improve them simultaneously. Moreover, directly annealing the CNCs in air without the assistance of molten salt could significantly improve both PL and PersL but led to particle heterogeneity and aggregation, which are highly unsuitable for in vivo imaging. We believe this work provides a novel strategy to design PLNCs with high PL intensity and long PersL duration without losing their nanostructural characteristics, water dispersibility and biocompatibility.

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Heat‐Treatment‐Assisted Molten‐Salt Strategy to Enhance Electrochemical Performances of Li‐Rich Assembled Microspheres by Tailoring Their Surface Features

Cited by 11 publications

References 51 publications

Substantial Doping Engineering in Layered LiNi_0.5+xCo_0.2−xMn_0.3O₂ Materials for Lithium-Ion Batteries

Substantial Doping Engineering in Layered LiNi_0.5+xCo_0.2−xMn_0.3O₂ Materials for Lithium-Ion Batteries

Natrium Karbonat : Termodinamika dan Transport Ion

Molten‐Salt‐Assisted Annealing for Making Colloidal ZnGa₂O₄:Cr Nanocrystals with High Persistent Luminescence

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Heat‐Treatment‐Assisted Molten‐Salt Strategy to Enhance Electrochemical Performances of Li‐Rich Assembled Microspheres by Tailoring Their Surface Features

Cited by 11 publications

References 51 publications

Substantial Doping Engineering in Layered LiNi0.5+xCo0.2−xMn0.3O2 Materials for Lithium-Ion Batteries

Substantial Doping Engineering in Layered LiNi0.5+xCo0.2−xMn0.3O2 Materials for Lithium-Ion Batteries

Natrium Karbonat : Termodinamika dan Transport Ion

Molten‐Salt‐Assisted Annealing for Making Colloidal ZnGa2O4:Cr Nanocrystals with High Persistent Luminescence

Contact Info

Product

Resources

About

Substantial Doping Engineering in Layered LiNi_0.5+xCo_0.2−xMn_0.3O₂ Materials for Lithium-Ion Batteries

Substantial Doping Engineering in Layered LiNi_0.5+xCo_0.2−xMn_0.3O₂ Materials for Lithium-Ion Batteries

Molten‐Salt‐Assisted Annealing for Making Colloidal ZnGa₂O₄:Cr Nanocrystals with High Persistent Luminescence