Effects of surface modification and organic binder type on cell performance of water-processed Ni-rich Li(Ni0.8Co0.1Mn0.1)O2 cathodes

Sireesha, Pedaballi; Li, Chia‐Chen

doi:10.1016/j.jpowsour.2020.228552

Cited by 29 publications

(25 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…36 Meanwhile, the shift to higher BE for the Co 2p 2/3 peak of the BTJ-L@NCM811 samples (781.8 vs 780.7 eV) is consistent with the transformation from Co 4+ to Co 3+ . 37,38 The Li 1s spectra in Figure 7d reveal two fitted peaks for the BTJ-L-modified powder samples: one at ∼54.0 eV, corresponding to intercalated lithium (Li int ), and the other at eV for CO bonds (imide and TCA species in BTJ-L), 39 and near 532.5 eV for, presumably, organic C−O bonds 10,11 (see Figure 7e). The intensity of the CO and C−O bonds in the BTJ-L@NCM811 samples is higher than that in the pristine NCM811 samples.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The C 1s spectra in Figure 7f show peaks at 284.3 eV for C−C units, at 285.2 eV for hydrocarbon C−H bonds, and at 288.8 eV for CO bonds. 10,11,39 In Figure 7g, peaks in the S 2p spectra appear at 162.9 and 168.3 eV, representing S 2p 3/2 and S 2p 1/2 BEs, respectively. 13,40 Similarly, the N 1s spectra in Figure 7h reveal a peak near 400.1 eV for C−N bonds 40 in the case of the 1 wt % BTJ-L@NCM811 samples but no such peaks for the pristine NCM811 samples.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Pham

Yang

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

In this study, we synthesized a Li-containing "BTJ-L" hybrid oligomerobtained through polymerization of bismaleimide (BMI) with a polyether monoamine (i.e., Jeffamine-M1000, JA), trithiocyanuric acid (TCA), and LiOHand coated it as an additive in various amounts (0.5−2 wt %) onto the surface of a Ni-rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode active material, forming BTJ-L@NCM811 electrodes for lithiumion batteries (LIBs). Relative to CR2032 coin-type cells incorporating a pristine NCM811 electrode, the cells with the 1 wt % BTJ-L@NCM811 electrode demonstrated a slightly higher initial discharge capacity (173 mAh g −1 vs171 mAh g −1 ) and higher values of average Coulombic efficiency, CE avg (99.5% vs98.9%) and capacity retention, CR (86.1% vs72.9%) after 100 cycles at 1C. Electrochemical impedance spectroscopy revealed that the decrease in the charge transfer resistance (R ct : 46.7 Ω vs171.1 Ω) and the superior Li + ion diffusivity (D Li + : ∼1.09 × 10 −12 cm 2 s −1 vs ∼1.61 × 10 −13 cm 2 s −1 ) of the cells incorporating the BTJ-L@NCM811 electrode after cycling at 1C could be attributed to the excellent wettability toward the electrolyte and the extra Li + ions contributed by the hybrid BTJ-L oligomer additive. Therefore, the BTJ-L oligomer coating layer functioned much like an artificial cathode electrolyte interphase (CEI) layer, impairing the dissolution of transition metals (TMs) from the cathode materials into the carbonate-based electrolytes. Furthermore, in situ microcalorimetry manifested that the total exothermic heat generation (Q t ) of the coin cells containing the 1 wt % BTJ-L@NCM811 electrode operating at 1C in isothermal modes (35 and 55 °C) during the charging process was dramatically lower (by ca. 45%) relative to that of the cells incorporating the pristine NCM811 electrode. On the basis of an ARC-HWS analysis, the delithiated pristine NCM811 electrode shows thermal reactivity with the electrolyte at a much earlier stage in comparison to the 1 wt % BTJ-L@NCM811 counterpart (843 min vs 1039 min) between 171 and 192 °C. Thus, Ni-rich NCM811 cathode materials coated with trace amounts (i.e., 1 wt %) of the BTJ211-L1 hybrid oligomer additives displayed both enhanced electrochemical performance and remarkably improved thermal stability. Accordingly, this Li-containing BTJ-L hybrid oligomer appears to be a great candidate material for coating high-Ni oxide cathode materials to enhance the safety and electrochemical performance of LIB cells.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Pham

Yang

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…This may correlate with the fluidity or dispersion of the corresponding slurries, according to the rheological measurement shown in Figure 1E. Because none of the slurries contained any binder, the cathode materials received no lubrication and easily formed agglomerates in the slurries, as evidenced by the pseudo‐plasticity 36‐38 . The BF85‐15 slurry exhibited the highest viscosity, probably due to its highest content of hydrophobic nano‐CB (like most carbonaceous materials) and hence less compatible in the aqueous slurry.…”

Section: Resultsmentioning

confidence: 95%

“…Because none of the slurries contained any binder, the cathode materials received no lubrication and easily formed agglomerates in the slurries, as evidenced by the pseudo-plasticity. [36][37][38] The BF85-15 slurry exhibited the highest viscosity, probably due to its highest content of hydrophobic nano-CB (like most carbonaceous materials) and hence less compatible in the aqueous slurry. With the highest ratio of NCM 811 to nano-CB, the BF97-3 slurry appeared the least frothy (Figure S1), suggesting that it had better fluidity than the others.…”

Section: Fluidity and Distribution Of Ncm 811 Slurriesmentioning

confidence: 99%

Using conductive carbon fabric to fabricate binder‐free Ni‐rich cathodes for Li‐ion batteries

Sireesha

2021

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

Summary Carbon fabric is proposed as an alternative current collector for fabricating water‐processed LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes in order to prevent electrode corrosion problems from the use of conventional Al foil. The interlaced fiber bundles in carbon fabric feature plenty of voids and a large surface area to accommodate electrode materials without requiring an insulating binder. Further, the connected network structure of carbon fabric serves as a three‐dimensional pathway for electron transport. However, our experiments also reveal the necessity to adopt a conductive agent, although a very high content of it reduces the uniform distribution of cathode materials. When increasing the content of conductive agent from 3% to 15%, capacity retention of the corresponding NCM811 cell rises from 76% to 93% after charge/discharge at 0.5 C for 300 cycles. The causes of this increase are discussed.

show abstract

“…One is the loss of Li + from the active material, and the second one is the resulting pH increase of the electrode paste leading to a corrosion of the aluminum (Al) foil current collector. On the one hand, the main strategy to mitigate the Li + /H + exchange is protecting the cathode particle surface via surface coatings or functionalization [21] since the Li + /H + exchange most likely arises from the structural similarity to NiOOH [22] . In addition, suitable binder systems on the other hand are explored for various existing cathode chemistries.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Lithium Polyacrylate Binders for Aqueous Processing of Ni‐Rich Lithium Layered Oxide Cathodes for Lithium‐Ion Batteries

et al. 2022

View full text Add to dashboard Cite

Ni-rich layered oxide cathodes are promising candidates to satisfy the increasing energy demand of lithium-ion batteries for automotive applications. Aqueous processing of such materials, although desirable to reduce costs and improve sustainability, remains challenging due to the Li + /H + exchange upon contact with water, resulting in a pH increase and corrosion of the aluminum current collector. Herein, an example was given for tuning the properties of aqueous LiNi 0.83 Co 0.12 Mn 0.05 O 2 electrode pastes using a lithium polyacrylate-based binder to find the "sweet spot" for processing parameters and electrochemical performance. Polyacrylic acid was partially neutralized to balance high initial capacity, good cycling stability, and the prevention of aluminum corrosion. Optimized LiOH/polyacrylic acid ratios in water were identified, showing comparable cycling performance to electrodes processed with polyvinylidene difluoride requiring toxic N-methyl-2pyrrolidone as solvent. This work gives an exemplary study for tuning aqueous electrode pastes properties aiming towards a more environmentally friendly processing of Ni-rich cathodes.

show abstract

Effects of surface modification and organic binder type on cell performance of water-processed Ni-rich Li(Ni0.8Co0.1Mn0.1)O2 cathodes

Cited by 29 publications

References 46 publications

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Using conductive carbon fabric to fabricate binder‐free Ni‐rich cathodes for Li‐ion batteries

Investigation of Lithium Polyacrylate Binders for Aqueous Processing of Ni‐Rich Lithium Layered Oxide Cathodes for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Effects of surface modification and organic binder type on cell performance of water-processed Ni-rich Li(Ni0.8Co0.1Mn0.1)O2 cathodes

Cited by 29 publications

References 46 publications

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Using conductive carbon fabric to fabricate binder‐free Ni‐rich cathodes for Li‐ion batteries

Investigation of Lithium Polyacrylate Binders for Aqueous Processing of Ni‐Rich Lithium Layered Oxide Cathodes for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries