Improved electrochemical performance of the LiNi0.8Co0.1Mn0.1O2 material with lithium-ion conductor coating for lithium-ion batteries

Wang, Meng; Zhang, Ran; Gong, Yongqiang; Su, Yuefeng; Xiang, Debo; Lin, Chen; Chen, Yunbo; Luo, Min; Chu, Mo

doi:10.1016/j.ssi.2017.10.017

Cited by 94 publications

(53 citation statements)

References 40 publications

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“…We observed noticeably separated (006)/(102) and (108)/(110) peaks, which are consistent with the typical patterns of an ordered layered structure. Consequently, the pristine NCM811 cathode materials have the typical α-NaFeO 2 layered structure without any structural deformation or defects with a hexagonal crystal structure in the R-3m space group, as illustrated in the schematic of the NCM811 crystal structure [28][29][30][31][32].…”

Section: Resultsmentioning

confidence: 99%

“…Energies 2019, 12, x FOR PEER REVIEW 3 of 12 consistent with the typical patterns of an ordered layered structure. Consequently, the pristine NCM811 cathode materials have the typical α-NaFeO2 layered structure without any structural deformation or defects with a hexagonal crystal structure in the R-3m space group, as illustrated in the schematic of the NCM811 crystal structure [28][29][30][31][32]. To understand the effect of the microcracks formed between primary particles on the capacity fading of the NCM811 cathode material during high-temperature cycling tests, a pouch-type full cell containing the NCM811 cathode material was prepared and galvanostatically charged and discharged for 600 cycles at 45 °C.…”

Section: Resultsmentioning

confidence: 99%

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Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Ahn

Cho

et al. 2019

Energies

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Understanding the capacity fading mechanism of the LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode materials is crucial for achieving long-lasting lithium-ion batteries with high energy densities. In this study, we investigated the factors affecting the capacity fading of NCM811 during repeated cycling at high temperatures. We found that the change in the c-axis length during charging and discharging is the main cause of the formation and propagation of microcracks in the primary particles of NCM811. In addition, the electrolyte is decomposed on the microcrack surfaces and, consequently, by-products are formed on the particle surface, increasing the impedance and resulting in poor electronic and ionic connectivity between the primary particles of NCM811. In addition, the transition metals in the NCM811 cathode material are dissolved in the electrolyte from the newly formed microcrack surface between primary particles. Therefore, the electrolyte decomposition and transition metal dissolution on the newly formed surface are the major deteriorative effects behind the capacity fading in NCM811.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Ahn

Cho

et al. 2019

Energies

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“…In this above Equation (6), the R , T , A , n , F , C , and σ are respectively behalf of the gas constant (8.314 J mol K −1 ), the absolute temperature (298 K), the effective area for electrode, the number of electrons for each molecule during the redox process, the Faraday's constant (96485 C mol −1 ), the concentration of lithium ions in the bulk materials, and the Warburg impedance coefficient. The value of σ can be gained by the following equation :

true Z^{'} = R_{s} + R_{ct} + σ ω^{- 1 / 2}

…”

Section: Resultsmentioning

confidence: 99%

“…process, the Faraday's constant (96485 C mol À 1 ), the concentration of lithium ions in the bulk materials, and the Warburg impedance coefficient. The value of σ can be gained by the following equation (7): [64]…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of Tunable Olive‐Like Ni_0.8Co_0.1Mn_0.1CO₃ and its Transformation to LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for Li‐Ion Batteries

et al. 2019

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Uniform olive‐like Ni0.8Co0.1Mn0.1CO3 carbonate precursors were successfully synthesized under hydrothermal conditions. Powder X‐ray diffraction, field emission scanning electron microscopy, optical microscopy, and inductively coupled plasma optical emission spectroscopy revealed that crystal size and elemental contents of carbonate precursors could be slightly tuned by regulating the molar ratio of urea and transition metal ions, moreover, a synergetic crystal evolution mechanism involving Ostwald ripening and crystal etching for the formation of olive‐like carbonate precursors was put forward for the first time. The improvement in temperature facilitated the increment in size of primary particles of oxides transformed from carbonate precursors. Vermiform LiNi0.8Co0.1Mn0.1O2 cathode materials transformed from olive‐like carbonate precursors exhibited high discharge capacity of 193.4 mAh g−1 at 0.2 C, and capacity retention of 85.4 % at 1 C after 100 cycles. Charge transfer impedance (Rct) and diffusion coefficient of lithium ion (DLi+) revealed the electrochemical properties of cathode materials.

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“…To mitigate the cathode reactivity with the electrolyte, there are five approaches for the development of high energy LIBs: (1) the incorporation of electrochemically inactive elements into the cathode structure, [30][31][32][33][34][35][36][37] (2) the introduction of the concentration gradient, (3) the introduction of surface coating layer on the cathode, [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] (4) the morphological changes to the porous structure, and (5) the crystallinity tuning from the polycrystalline to the single crystalline cathode. [57][58][59][60][61][62][63][64][65][66] With respect to the first approach, it could improve the interfacial stability by inhibiting the transition metal reductions.…”

Section: Introductionmentioning

confidence: 99%

Surface and Interfacial Chemistry in the Nickel‐Rich Cathode Materials

Kim

Cha

Lee

et al. 2020

Batteries & Supercaps

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With increasing demands for high energy lithium‐ion batteries, layered nickel‐rich cathode materials have been considered as the most promising candidate due to their high reversible capacity and low cost. Although some of the materials with nickel contents ≦60 % were commercialized, there are tremendous obstacles for further improvement of electrochemical performance, which is strongly related to the unstable cathode surface and interfacial properties. In this regard, a specific review on the interfacial chemistry between the cathode and electrolyte during electrochemical testing is provided. We highlight the underpinning interfacial chemistry and degradation mechanisms of the cathode materials. Finally, light is shed on the recent efforts for enhancing the interfacial stability of the nickel‐rich cathode materials.

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Improved electrochemical performance of the LiNi0.8Co0.1Mn0.1O2 material with lithium-ion conductor coating for lithium-ion batteries

Cited by 94 publications

References 40 publications

Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Hydrothermal Synthesis of Tunable Olive‐Like Ni_0.8Co_0.1Mn_0.1CO₃ and its Transformation to LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for Li‐Ion Batteries

Surface and Interfacial Chemistry in the Nickel‐Rich Cathode Materials

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Improved electrochemical performance of the LiNi0.8Co0.1Mn0.1O2 material with lithium-ion conductor coating for lithium-ion batteries

Cited by 94 publications

References 40 publications

Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Hydrothermal Synthesis of Tunable Olive‐Like Ni0.8Co0.1Mn0.1CO3 and its Transformation to LiNi0.8Co0.1Mn0.1O2 Cathode Materials for Li‐Ion Batteries

Surface and Interfacial Chemistry in the Nickel‐Rich Cathode Materials

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About

Hydrothermal Synthesis of Tunable Olive‐Like Ni_0.8Co_0.1Mn_0.1CO₃ and its Transformation to LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for Li‐Ion Batteries