Engineering lithium-ion battery cathodes for high-voltage applications using electromagnetic excitation

Su, Laisuo; Jha, Shikhar Krishn; Phuah, Xin Li; Xu, Jiang; Nakamura, Nathan; Wang, Haiyan; Okasinski, John; Reeja‐Jayan, B.

doi:10.1007/s10853-020-04871-5

Cited by 11 publications

(10 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak current and the scan rate can be described by the Randles−Sevcik equation for all three electrolytes (Figure S7d), indicating a diffusioncontrolled behavior. 26 Compared to the LP57 electrolyte, the current peaks are much broader and shifted to a much higher voltage for the SE, especially at high scan rates (0.2 and 0.4 mV s −1 ). By contrast, the current peaks maintain a shape and position in the LSE similar to that in the LP57 electrolyte.…”

mentioning

confidence: 91%

Protection of Cobalt-Free LiNiO₂ from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Manthiram

2022

ACS Energy Lett.

Self Cite

View full text Add to dashboard Cite

High-nickel layered oxide cathode materials are the most promising candidates for developing lithium-metal batteries (LMBs) because of their high energy density and low cost. Herein, we present a localized saturated electrolyte (LSE) based on readily available, low-cost LiPF6 salt with limited solubility in carbonate solvents for developing LiNiO2 cathodes. Compared to the conventional electrolyte that retains only 55% of the initial capacity after 200 cycles, the LSE retains a record 81% of the initial capacity after 600 deep cycles at 4.4 V (versus Li/Li+). The LSE protects the LiNiO2 surface from degrading into rock-salt and spinel phases during cycling and helps form a robust Li morphology on the Li-metal anode that is covered by an inorganic-rich solid-electrolyte interphase. The drastically enhanced cycling stability with LSE demonstrates the importance of developing robust electrolytes compatible with both high-Ni cathodes and Li-metal anodes.

show abstract

mentioning

confidence: 91%

Protection of Cobalt-Free LiNiO₂ from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Manthiram

2022

ACS Energy Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The electrode–electrolyte interface (EEI) is recognized as one of the most crucial components inside lithium-ion batteries (LIBs) because of the diverse phenomena that occur in this region: charge transfer reactions, electrolyte decomposition, and electrode (cathode, anode) degradation . Engineering the EEI with the desired properties is important for developing advanced LIBs with high power densities, a high degree of thermal safety, and long lifespans. − Although many artificial coatings (organic and inorganic) have been applied to engineer the EEI, we currently have a limited understanding of the Li + kinetics in these artificial coatings and at the EEI . For example, Li et al reported that Li + migration at the EEI mediates phase transformation in cathode particles of LiFePO 4 .…”

Section: Introductionmentioning

confidence: 99%

Tailoring Electrode–Electrolyte Interfaces in Lithium-Ion Batteries Using Molecularly Engineered Functional Polymers

Weaver

Groenenboom

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Electrode−electrolyte interfaces (EEIs) affect the rate capability, cycling stability, and thermal safety of lithium-ion batteries (LIBs). Designing stable EEIs with fast Li + transport is crucial for developing advanced LIBs. Here, we study Li + kinetics at EEIs tailored by three nanoscale polymer thin films via chemical vapor deposition (CVD) polymerization. Small binding energy with Li + and the presence of sufficient binding sites for Li + allow poly(3,4-ethylenedioxythiophene) (PEDOT) based artificial coatings to enable fast charging of LiCoO 2 . Operando synchrotron X-ray diffraction experiments suggest that the superior Li + transport property in PEDOT further improves current homogeneity in the LiCoO 2 electrode during cycling. PEDOT also forms chemical bonds with LiCoO 2 , which reduces Co dissolution and inhibits electrolyte decomposition. As a result, the LiCoO 2 4.5 V cycle life tested at C/2 increases over 1700% after PEDOT coating. In comparison, the other two polymer coatings show undesirable effects on LiCoO 2 performance. These insights provide us with rules for selecting/designing polymers to engineer EEIs in advanced LIBs.

show abstract

“…There are no signs of similar redox activity from the TiO 2 ‐coating layer based on the electrochemistry data in the current study; however, the XPS results suggests that the TiO 2 ‐layer is fluorinated upon battery cycling. Fluorination of TiO 2 ‐coating on cathode materials has previously been reported by several authors [32,63] . It has furthermore been shown that TiF 4 is soluble in solvents with high donor number [64] .…”

Section: Resultsmentioning

confidence: 73%

“…Fluorination of TiO 2coating on cathode materials has previously been reported by several authors. [32,63] It has furthermore been shown that TiF 4 is soluble in solvents with high donor number. [64] EC, with a donor number of 16.4 kcal mol À 1 , [65] can thus dissolve some TiF 4 .…”

Section: Chemsuschemmentioning

confidence: 99%

On the Durability of Protective Titania Coatings on High‐Voltage Spinel Cathodes

et al. 2022

View full text Add to dashboard Cite

TiO 2 -coating of LiNi 0.5-x Mn 1.5 + x O 4 (LNMO) by atomic layer deposition (ALD) has been studied as a strategy to stabilize the cathode/electrolyte interface and mitigate transition metal (TM) ion dissolution. The TiO 2 coatings were found to be uniform, with thicknesses estimated to 0.2, 0.3, and 0.6 nm for the LNMO powders exposed to 5, 10, and 20 ALD cycles, respectively. While electrochemical characterization in half-cells revealed little to no improvement in the capacity retention neither at 20 nor at 50 °C, improved capacity retention and coulombic efficiencies were demonstrated for the TiO 2 -coated LNMO in LNMO j j graphite full-cells at 20 °C. This improvement in cycling stability could partly be attributed to thinner cathode electrolyte interphase on the TiO 2 -coated samples. Additionally, energy-dispersive X-ray spectroscopy revealed a thinner solid electrolyte interphase on the graphite electrode cycled against TiO 2 -coated LNMO, indicating retardation of TM dissolution by the TiO 2 -coating.

show abstract

Engineering lithium-ion battery cathodes for high-voltage applications using electromagnetic excitation

Cited by 11 publications

References 36 publications

Protection of Cobalt-Free LiNiO₂ from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Protection of Cobalt-Free LiNiO₂ from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Tailoring Electrode–Electrolyte Interfaces in Lithium-Ion Batteries Using Molecularly Engineered Functional Polymers

On the Durability of Protective Titania Coatings on High‐Voltage Spinel Cathodes

Contact Info

Product

Resources

About

Engineering lithium-ion battery cathodes for high-voltage applications using electromagnetic excitation

Cited by 11 publications

References 36 publications

Protection of Cobalt-Free LiNiO2 from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Protection of Cobalt-Free LiNiO2 from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Tailoring Electrode–Electrolyte Interfaces in Lithium-Ion Batteries Using Molecularly Engineered Functional Polymers

On the Durability of Protective Titania Coatings on High‐Voltage Spinel Cathodes

Contact Info

Product

Resources

About

Protection of Cobalt-Free LiNiO₂ from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries

Protection of Cobalt-Free LiNiO₂ from Degradation with Localized Saturated Electrolytes in Lithium-Metal Batteries