Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite cells–effect of binder

Rago, Nancy Dietz; Graczyk, Donald G.; Tsai, Yifen; Naik, Seema R.; Li, Jianlin; Du, Zhijia; Wood, David L.; Steele, Leigh Anna Marie; Lamb, Joshua; Spangler, Scott Wilmer; Grosso, Christopher; Fenton, Kyle R; Bloom, Ira

doi:10.1016/j.jpowsour.2019.227414

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…Most likely, these are lithium dendrites. [28][29][30][31] SEI on the negative electrode surface.-Materials on the graphite negative electrode surface were further characterized by XPS. These results are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Extreme Fast Charging: Effect of Positive Electrode Material on Crosstalk

Yang

Kim

Tsai

et al. 2022

J. Electrochem. Soc.

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Extreme fast charging (XFC) is a key requirement for the adoption of battery-based electric vehicles by the transportation sector. However, XFC has been shown to accelerate degradation, causing the capacity, life, and safety of batteries to deteriorate. We tested cells containing five positive electrode chemistries, LFP (olivine structure), LMO (spinel), LCO (layered), NMC811 (layered), and NCA (layered), using fast-charging protocols. After testing, the negative electrodes from cells containing positive electrodes crystallizing with a layered structure were found to have more lithium deposited on their surfaces. Those crystallizing with a layered structure also tended to have a larger increase in impedance than those crystallizing with a spinel or olivine structure. Characterization of the negative electrodes by X-ray photoelectron spectroscopy showed that using the concentrations of LiF and LixPOyFz as metrics, the concentration of LiF in the positive electrodes is LFP > LMO > LCO ~ NMC811 > NCA; and for LixPOyFz, the order is LMO > LFP > NCA > NMC811 > LCO. Clearly, the positive-electrode material was influencing the amounts of these materials formed.

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Section: Resultsmentioning

confidence: 99%

Extreme Fast Charging: Effect of Positive Electrode Material on Crosstalk

Yang

Kim

Tsai

et al. 2022

J. Electrochem. Soc.

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“…However, the influence of binders has been long underestimated. Rago et al prepared 1.5 Ah NCM523||graphite full cells with different binders and studied the overcharge process in details [89,90]. In one case, 5% and 6% (both by weight ratio) PVDF were used as the binders for the cathode and anode, respectively [89], which was sorted as the NMP system.…”

Section: Novel Binders For Libsmentioning

confidence: 99%

“…In one case, 5% and 6% (both by weight ratio) PVDF were used as the binders for the cathode and anode, respectively [89], which was sorted as the NMP system. As a comparison, 4% PVDF + 1% CMC and 4.8% SBR + 1.2% CMC were used [90] and sorted as the aqueous one. They found that the TM ions shuttle to the anodes when the cells were overcharged in both cases; however, the ion loss in the NMP system is more serious especially when the state of charge (SOC) is higher than 160%.…”

Section: Novel Binders For Libsmentioning

confidence: 99%

Exploring More Functions in Binders for Lithium Batteries

Zhang,

Wu,

Qian

et al. 2023

Electrochem. Energy Rev.

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As an indispensable part of the lithium-ion battery (LIB), a binder takes a small share of less than 3% (by weight) in the cell; however, it plays multiple roles. The binder is decisive in the slurry rheology, thus influencing the coating process and the resultant porous structures of electrodes. Usually, binders are considered to be inert in conventional LIBs. In the pursuit of higher energy density, many new binders are being developed for specific targets, such as the high-voltage (typically, $$\geqslant$$ ⩾ 4.5 V) cathodes, conversion/alloy-type cathodes/anodes with large volume effect, and solid-state batteries (SSBs), in which these binders demonstrate their various functions. They may influence the solid electrolyte interface component, ensure the electrode/electrolyte interfacial stability, transport ions/electrons in the electrodes, provide adhesion and flexibility to solid-state electrolyte (SSE) films, etc. Here in this review, we try to summarize the advances on binders, among which the ones for high-voltage cathode materials, thick electrodes, micro-sized silicon particles, SSEs and SSBs are highlighted. We believe that the advanced functional binders would play decisive roles in the future development of high-energy–density LIBs and SSBs. Graphical Abstract Binder usually takes a small part in batteries, while recent studies prove that it has multi-functions more than just adhesive.

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“…Since the energy density of the battery relies on the cathode materials, many efforts have been made to develop alternative cathode materials with higher lithium utilization and specific energy density [4][5][6][7]. Among diversified active cathode materials [8][9][10][11][12][13][14][15][16][17], such as LiMn 2 O 4 , LiNiO 2 , LiCoO 2 , LiFePO 4 , LiNi x Co y Mn 1−x−y O 2 (NCM) and LiNi x Co y Al 1−x−y O 2 , the high-nickel NCM materials, such as NCM811, have been the most desirable candidates for manufacturing the newgeneration high-energy LIBs because of their high specific capacity up to ≈200 mAh•g −1 (4.3 V versus Li/Li + ) and an unique potential of high-voltage operation ability theoretically up to 4.5 V [18][19][20]. However, the poor cycle performance and thermal stability severely limit the commercial applicability of high-nickel layered ternary cathode materials [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Design of Nb⁵⁺-doped high-nickel layered ternary cathode material and its structure stability

Zhao,

Liu,

Tang

et al. 2023

Nanotechnology

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LiNi0.8Co0.1Mn0.1O2 (NCM811) is one of the most promising cathode materials for high-energy lithium-ion batteries, but there are still problems such as rapid capacity decay during charge and discharge and poor cycle performance. Elemental doping can significantly improve the electrochemical performance of high nickel ternary cathode materials. In this work, Nb5+-doped NCM811 cathode material was successfully synthesized. The results show that Nb5+ doping helps to increase the interlayer spacing of the lithium layer, electron transport, and structural stability, thereby significantly improving the conductivity of Li+. At a high voltage of 4.6 V, the initial discharge specific capacity of 1% Nb5+-doped NCM811 cathode material at 0.1 C is 222.3 mAh·g−1, and the capacity retention rate after 100 cycles at 1 C is 92.03%, which is far more than the capacity retention rate of NCM811 under the same conditions (74.30%). First-principles calculations prove that 1% Nb5+-doped NCM811 cathode material shows the highest electronic conductivity and Nb5+ doping will not change the lattice structure, demonstrating the effectiveness of the proposed strategy.

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Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite cells–effect of binder

Cited by 6 publications

References 23 publications

Extreme Fast Charging: Effect of Positive Electrode Material on Crosstalk

Extreme Fast Charging: Effect of Positive Electrode Material on Crosstalk

Exploring More Functions in Binders for Lithium Batteries

Design of Nb⁵⁺-doped high-nickel layered ternary cathode material and its structure stability

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Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite cells–effect of binder

Cited by 6 publications

References 23 publications

Extreme Fast Charging: Effect of Positive Electrode Material on Crosstalk

Extreme Fast Charging: Effect of Positive Electrode Material on Crosstalk

Exploring More Functions in Binders for Lithium Batteries

Design of Nb5+-doped high-nickel layered ternary cathode material and its structure stability

Contact Info

Product

Resources

About

Design of Nb⁵⁺-doped high-nickel layered ternary cathode material and its structure stability