Comparative study of Sn-doped Li[Ni0.6Mn0.2Co0.2-Sn ]O2 cathode active materials (x = 0-0.5) for lithium ion batteries regarding electrochemical performance and structural stability

Eilers‐Rethwisch, Matthias; Hildebrand, Stephan; Evertz, Marco; Ibing, Lukas; Dagger, Tim; Winter, Martin; Schappacher, Falko M.

doi:10.1016/j.jpowsour.2018.06.072

Cited by 46 publications

(28 citation statements)

References 51 publications

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“…Moreover, the MXene loaded on the PP separator included abundant functional groups, which was better for the wettability of PP with the electrolyte and could accelerate Li ions transmission. Therefore, MXene/PP cell showed better electrochemical performances than PP cell in both capacity and capacity retention during rate tests [ 7 , 11 , 12 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

“…However, its poor mechanical strength, cycling stability, and rate capability impose limitations on its large-scale practical application [ 9 ]. In order to solve these problems, most strategies are focusing on the modification of NCM811 [ 8 , 9 , 10 , 11 , 12 ]. However, the modification process is time-consuming, labor-intensive, and energy-intensive, and it is difficult to achieve mass production.…”

Section: Introductionmentioning

confidence: 99%

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Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

et al. 2020

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In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rct of MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

et al. 2020

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“…Doping is generally recognized as an effective strategy to adjust the properties of materials 178. And many elements have been reported doped into the Ni‐rich NCM cathode materials to improve their cycle performance, such as B,42 F,165,179,180 Na91,97 Mg,114,161,181 Al,43,181,182 Si,181,183 S,184 Ca,185 Ti,164,181 V,181 Cr,161 Mn,186 Mo,90,98 Sn,187 Nb,148,170 Ga,181 Y,110 Zr,40,163,181 Ce,93 Al–Mg,162,188 Al–Fe,156 and Mg–Al–B 147. There are several mechanisms for improving the cycle performance: 1) Inactive elements can substitute the unstable elements (Ni and Li) in the Ni‐rich NCM system to hold the original structure;185,189 2) fixing the primary particles of cathode materials to relieve the evolution of cracks 42…”

Section: Service Life Of Ni‐rich Ncm For Libsmentioning

confidence: 99%

Ni‐Rich/Co‐Poor Layered Cathode for Automotive Li‐Ion Batteries: Promises and Challenges

Wang

Ding

Deng

et al. 2020

Advanced Energy Materials

293

218

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To pursue a higher energy density (>300 Wh kg−1 at the cell level) and a lower cost (<$125 kWh−1 expected at 2022) of Li‐ion batteries for making electric vehicles (EVs) long range and cost‐competitive with internal combustion engine vehicles, developing Ni‐rich/Co‐poor layered cathode (LiNi1−x−yCoxMnyO2, x+y ≤ 0.2) is currently one of the most promising strategies because high Ni content is beneficial to high capacity (>200 mAh g−1) while low Co content is favorable to minimize battery cost. Unfortunately, Ni‐rich cathodes suffer from limited structure stability and electrode/electrolyte interface stability in the charged state, leading to electrode degradation and poor cycling performance. To address these problems, various strategies have been employed such as doping, structural optimization design (e.g., core–shell structure, concentration‐gradient structure, etc.), and surface coating. In this review, five key aspects of Ni‐rich/Co‐poor layered cathode materials are explored: energy density, fast charge capability, service life including cycling life and calendar life, cost and element resources, and safety. This enables a comprehensive analysis of current research advances and challenges from the perspective of both academy and industry to help facilitate practical applications for EVs in the future.

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“…However, in practice, Li-containing layered oxides turned out to be very insusceptible toward the Sn 4+ doping. Although Sn 4+ for 3d-metal substitutions have been performed in various systems like Li[Ni 0.5 Co 0.2 Mn 0.3 ] 1− x Sn x O 2 , 8 Li[Ni 0.6 Mn 0.2 Co 0.2− x Sn x ]O 2 , 9 LiNi 3/8 Co 2/8 Mn 3/8− x Sn x O 2 , 10 Li[Ni 1/3 Co 1/3 Mn 1/3 ] 1− x Sn x O 2 , 11 Li 1.15 Ni 0.27 Mn 0.58− x Sn x O 2 , 12 Li 1.2 Ni 0.13 Co 0.13 Mn 0.54− x Sn x O 2 , 13,14 Li[Ni 0.82 Co 0.12 Mn 0.06 ] 1− x Sn x O 2 , 15 Li[Li 0.17 Ni 0.25 Mn 0.58− x Sn x ]O 2 , 16 LiNi 0.8− x Co 0.2 Sn x O 2 , 17 and finally LiCo 1− x Sn x O 2 , 18 successful Sn doping has never exceeded a few atomic percents, whereas attempts to further raise the Sn content always resulted in Li 2 SnO 3 admixture. Only for LiCo 1− x Sn x O 2 , the doping up to x = 0.10 was reported, but still, the homogeneity of Sn and Co distribution was not directly analyzed.…”

Section: Introductionmentioning

confidence: 99%

Li-based layered nickel–tin oxide obtained through electrochemically-driven cation exchange

et al. 2021

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Comparative study of Sn-doped Li[Ni0.6Mn0.2Co0.2-Sn ]O2 cathode active materials (x = 0-0.5) for lithium ion batteries regarding electrochemical performance and structural stability

Cited by 46 publications

References 51 publications

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Ni‐Rich/Co‐Poor Layered Cathode for Automotive Li‐Ion Batteries: Promises and Challenges

Li-based layered nickel–tin oxide obtained through electrochemically-driven cation exchange

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