Impact of phosphorus structural position on the electrochemical enhancement of phosphorus doped LiMn2O4

Rodríguez, Renier Arabolla; Montoro, Luciano A.; Santos, Manuel Ávila; Mohallem, Nelcy Della Santina; Laffita, Yodalgis Mosqueda; Pérez-Cappe, Eduardo L.

doi:10.1016/j.electacta.2020.135712

Cited by 14 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4a that there are two spin-orbital splitting signals Cu 2p 1/2 and Cu 2p 3/2 at the binding energies of 932.1 eV and 952.4 eV respectively, which suggests the presence of Cu 0 element and implies the effective reduction of Cu 2+ and deposition on the electrode surface. 31 The peak at 572.1 eV and 568.3 eV in Cu LMM XAES spectra of Fig. 4b can be attributed to Cu 0 and Cu + , which suggests the existence of the cuprous state, which agrees with the results of XRD analysis (Fig.…”

Section: Resultssupporting

confidence: 85%

Preparation of a phosphorus-doped copper–nickel electrode and its application in electro-hydrogenation of 5-HMF

Liu,

Peng,

Zhong

et al. 2023

New J. Chem.

View full text Add to dashboard Cite

show abstract

Section: Resultssupporting

confidence: 85%

Preparation of a phosphorus-doped copper–nickel electrode and its application in electro-hydrogenation of 5-HMF

Liu,

Peng,

Zhong

et al. 2023

New J. Chem.

View full text Add to dashboard Cite

show abstract

“…Besides, the Jahn−Teller effect may be the other reason, and more lithium ions can be incorporated into the crystal to form Li 1+x Mn 2 O 4 (0 < x < 1; probably x = 0.25 in our case) while maintaining the spinel structure. 21,22 The adsorption isotherms are more consistent with the Langmuir equation than with the Freundlich equation, indicating the homogeneous active sites and the negligible diffusion resistance inside the crystal. The detailed fitting parameters and correlation coefficients can be found in Table S2.…”

Section: ■ Results and Discussionmentioning

confidence: 79%

Hierarchically Porous Polyacrylonitrile (PAN) 3D Architectures with Anchored Lattice-Expanded λ-MnO₂ Nanodots as Freestanding Adsorbents for Superior Lithium Separation

Wang

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The search for novel lithium-ion sieves (LISs) with more desirable performance seems to be at the cutting edge of lithium separation from seawater and salt-lake brines. In this work, new types of freestanding shape-controllable LISs have been prepared by subtly anchoring λ-MnO2 nanodots on the surface of mesoporous polyacrylonitrile (PAN) nanoskeletons via a scalable sol–gel method. Synergistic effects originate from the hierarchically porous polymer structure, and the high surface ratio of nanodots significantly reduces ion-diffusion resistance, rendering superior kinetics with the adsorption equilibrium being achieved within 3 h for PMO-1. Moreover, PAN not only acts as a binder but also tunes the λ-MnO2 crystal structure by inhibiting the lattice shrinkage of LiMn2O4 during the acid leaching process. The slightly expanded crystal cell enhances the use of active sites, which ultimately results in an excellent saturated adsorption capacity of 49.0 mg g–1 for PMO-1 (based on the mass of λ-MnO2). Flow-through adsorption tests have also been performed by continuously injecting the solution into a PMO-1-packed column to verify its ability for practical applications, which further prove its robust cycling performance and superior lithium separation properties for both seawater and salt-lake brines.

show abstract

“…Interestingly, the introducing of V 2 O 5 also influences Li–O bond length, where the bond length has been stretched from 1.8258 to 1.9255 Å. It is noteworthy that the weakening of the Li–O bond will positively impact Li‐ion diffusion through the structure 51 …”

Section: Resultsmentioning

confidence: 99%

“…It is noteworthy that the weakening of the Li-O bond will positively impact Li-ion diffusion through the structure. 51 The surface morphologies of LMO and LMO-VO samples were characterized using SEM measurements, shown in Figure 4. It is discovered that there is no change in morphology features after coating process.…”

Section: Physical Characterization Propertiesmentioning

confidence: 99%

Improved cycling stability of V₂O₅ modified spinel LiMn₂O₄ cathode at high cut‐off voltage for lithium‐ion batteries

Radzi

Kufian

Vengadaesvaran

et al. 2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Spinel lithium manganese oxide, LiMn2O4 coated with V2O5 layer (labeled as LMO‐VO) has been developed and its electrochemical performances as cathode material for lithium‐ion batteries has been evaluated at high cut‐off voltage (>4.5 V vs. Li/Li+) and compared with pristine LiMn2O4 (labeled as LMO). The crystal structure investigations show that LMO‐VO has longer Li–O bond length for fast Li‐ion diffusion kinetic process. The scanning electron microscopy results indicate that LMO‐VO has finer particles and the V2O5 layer has been successfully coated on the LMO surface uniformly. The highly conductive V2O5 coating layer enhances the ionic conductivity of the LMO cathode, as evidenced by the significant drop of Rct value from the Nyquist plot. Under high operating voltage, the cell employed with coated LMO shows exceptional cycling performance in capacity retention and potential difference. After 300 cycles, the capacity retention per cycle has been boosted from 99.90% to 99.94% by adopting the V2O5 coating layer. In addition, surface coating with V2O5 stabilizes the potential difference at very minimal change for a longer period. This convincingly proves that the V2O5 coating layer not only protects against hydrofluoric acid (HF) attack and greatly restrains the increase of cell polarization at high voltage.

show abstract

Impact of phosphorus structural position on the electrochemical enhancement of phosphorus doped LiMn2O4

Cited by 14 publications

References 26 publications

Preparation of a phosphorus-doped copper–nickel electrode and its application in electro-hydrogenation of 5-HMF

Preparation of a phosphorus-doped copper–nickel electrode and its application in electro-hydrogenation of 5-HMF

Hierarchically Porous Polyacrylonitrile (PAN) 3D Architectures with Anchored Lattice-Expanded λ-MnO₂ Nanodots as Freestanding Adsorbents for Superior Lithium Separation

Improved cycling stability of V₂O₅ modified spinel LiMn₂O₄ cathode at high cut‐off voltage for lithium‐ion batteries

Contact Info

Product

Resources

About

Impact of phosphorus structural position on the electrochemical enhancement of phosphorus doped LiMn2O4

Cited by 14 publications

References 26 publications

Preparation of a phosphorus-doped copper–nickel electrode and its application in electro-hydrogenation of 5-HMF

Preparation of a phosphorus-doped copper–nickel electrode and its application in electro-hydrogenation of 5-HMF

Hierarchically Porous Polyacrylonitrile (PAN) 3D Architectures with Anchored Lattice-Expanded λ-MnO2 Nanodots as Freestanding Adsorbents for Superior Lithium Separation

Improved cycling stability of V2O5 modified spinel LiMn2O4 cathode at high cut‐off voltage for lithium‐ion batteries

Contact Info

Product

Resources

About

Hierarchically Porous Polyacrylonitrile (PAN) 3D Architectures with Anchored Lattice-Expanded λ-MnO₂ Nanodots as Freestanding Adsorbents for Superior Lithium Separation

Improved cycling stability of V₂O₅ modified spinel LiMn₂O₄ cathode at high cut‐off voltage for lithium‐ion batteries