Correlation between thermal stabilities of nickel‐rich cathode materials and battery thermal runaway

Sun, Ying; Ren, Dongsheng; Liu, Guijuan; Mu, Linjing; Wang, Li; Wu, Borong; Liu, Jianhong; Wu, Ningning; He, Xiangming

doi:10.1002/er.7143

Cited by 27 publications

(16 citation statements)

References 43 publications

(87 reference statements)

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“…150−180 °C). 29 TGA was conducted to investigate the thermal stability of the dry BTJ-L oligomer additive under an air atmosphere. First, a small amount of the BTJ-L oligomer additive solution was dried at 100 °C in a vacuum oven overnight to remove NMP.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Subsequently, the basic environment at the surfaces of the cathode active material particles catalyzed the polymerization of the residual −CC– groups in BMI-JA with the residual >NH groups in TCA-Li, thereby providing a highly cross-linked BTJ-L polymer layer, acting as a thermal fuse to segregate electron (e – ) and Li + ion transports, on the NCM811 surface prior to thermal runaway (at ca. 150–180 °C) …”

Section: Resultsmentioning

confidence: 99%

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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.

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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.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

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.

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“…As shown in figure 9(b), no obvious change was observed for the composite cathode using single-NCA after the first delithiation. In contrast, severe internal cracks were clearly observed within poly-NCA particles, which originates from lattice shrinkage, associated with the detrimental H2-H3 phase transition at ⩾4.1 V vs. Li/Li + [60,102,[121][122][123]. Moreover, high energy and power density need appropriate electronic and ionic transport pathways within composite cathodes.…”

Section: Materials Levelmentioning

confidence: 99%

Multiscale understanding of high-energy cathodes in solid-state batteries: from atomic scale to macroscopic scale

et al. 2022

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In the crucial area of sustainable energy storage, solid-state batteries (SSBs) with nonflammable solid electrolytes stand out due to their potential benefits of enhanced safety, energy density, and cycle life. However, the complexity within the composite cathode determines that fabricating an ideal electrode needs to link chemistry (atomic scale), materials (microscopic/mesoscopic scale), and electrode system (macroscopic scale). Therefore, understiang solid-state composite cathodes covering multiple scales is of vital importance for the development of practical SSBs. In this review, the challenges and basic knowledge of composite cathodes from the atomic scale to the macroscopic scale in SSBs are outlined with a special focus on the interfacial structure, charge transport, and mechanical degradation. Based on these dilemmas, emerging strategies to design a high-performance composite cathode and advanced characterization techniques are summarized. Moreover, future perspectives toward composite cathodes are discussed, aiming to facilitate the develop energy-dense solid-state batteries.

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“…24,25 In addition, when ternary LIBs are working, there will be temperature accumulation inside the battery. 26,27 According to previous reports, 28 the internal temperature hardly exceeds 300 C (if the temperature is too high, the battery will fail before reaching such a temperature). 29 In Ni-rich NCM compositions, thermal stability, which is crucial for avoiding catastrophic failures, as well as cycle stability drastically dropped as the nickel content increases within the NCM system.…”

Section: Introductionmentioning

confidence: 98%

A single-crystal nickel-rich material as a highly stable cathode for lithium-ion batteries

et al. 2022

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Correlation between thermal stabilities of nickel‐rich cathode materials and battery thermal runaway

Cited by 27 publications

References 43 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

Multiscale understanding of high-energy cathodes in solid-state batteries: from atomic scale to macroscopic scale

A single-crystal nickel-rich material as a highly stable cathode for lithium-ion batteries

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Correlation between thermal stabilities of nickel‐rich cathode materials and battery thermal runaway

Cited by 27 publications

References 43 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

Multiscale understanding of high-energy cathodes in solid-state batteries: from atomic scale to macroscopic scale

A single-crystal nickel-rich material as a highly stable cathode for lithium-ion batteries

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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