Enhanced performance of layered Li1.2Mn0.54Ni0.13Co0.13O2 cathode material in Li-ion batteries using nanoscale surface coating with fluorine-doped anatase TiO2

Rastgoo‐Deylami, Mohadese; Javanbakht, Mehran; Omidvar, Hamid

doi:10.1016/j.ssi.2018.12.025

Cited by 34 publications

(14 citation statements)

References 65 publications

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“…Recently, many efforts have been focused on constructing a coating layer. The layers of TiO 2 [94,95], Al 2 O 3 [96], MgO [97] and ZrO 2 [98] are generally much stable but exhibit low Li-ion conductivity. The thickness and homogeneity of the coating layer is vital to balance stability and rate capability.…”

Section: Cathode Materials Design For Safe Libsmentioning

confidence: 99%

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Duan

Tang

Dai

et al. 2019

Electrochem. Energ. Rev.

558

260

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Lithium-ion batteries (LIBs), with relatively high energy density and power density, have been considered as a vital energy source in our daily life, especially in electric vehicles. However, energy density and safety related to thermal runaways are the main concerns for their further applications. In order to deeply understand the development of high energy density and safe LIBs, we comprehensively review the safety features of LIBs and the failure mechanisms of cathodes, anodes, separators and electrolyte. The corresponding solutions for designing safer components are systematically proposed. Additionally, the in situ or operando techniques, such as microscopy and spectrum analysis, the fiber Bragg grating sensor and the gas sensor, are summarized to monitor the internal conditions of LIBs in real time. The main purpose of this review is to provide some general guidelines for the design of safe and high energy density batteries from the views of both material and cell levels.

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Section: Cathode Materials Design For Safe Libsmentioning

confidence: 99%

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Duan

Tang

Dai

et al. 2019

Electrochem. Energ. Rev.

558

260

View full text Add to dashboard Cite

show abstract

“…These issues are the main obstacles preventing the industrial application of Li‐ and Mn‐rich cathode materials. To address these issues, extensive efforts in the past decade have proven to be useful, including surface coating, lattice doping and particle size controlling, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Surface coating materials, such as Al 2 O 3 , TiO 2 , AlF 3 and AlPO 4 , can prevent electrodes from being directly exposed to electrolyte and mitigate side reactions with the electrolyte; mitigating the side reactions has been demonstrated to have marked effects on increasing the coulombic efficiency and long‐term cycling life. Lattice doping with cationic and anionic ions has become the most common approach to mitigate voltage and capacity fade by stabilizing bulk structures and blocking the release of oxygen .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Performance of Li‐ and Mn‐Rich Cathode Materials by Particle Blending and Surface Coating

et al. 2020

ChemistrySelect

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A Li‐ and Mn‐rich material Li1.18Mn0.55Ni0.18Co0.09O2 (LMR) exhibits a high specific capacity; however, this material has serious problems, including a poor rate capability and limited cycling life. A jet crushing method is used to break micron‐sized LMR particles synthesized by a solid‐state reaction into nano‐sized particles. Compared to micron‐sized particles, nano‐sized LMR particles possess a higher rate capability due to shorter Li+ diffusion pathway, but also an increase in side reactions with the electrolyte leads to poorer cycling performance. Herein, we propose a material engineering strategy that combines micron‐ and nano‐sized particle blending and a cerium oxide (CeO2) surface coating modifications to enhance the electrochemical performance of LMR material. X‐ray diffraction (XRD) patterns and transmission electron microscopy (TEM) images demonstrate that the cubic structure of CeO2 is uniformly distributed on the surface of LMR, which is supposed to suppress the electrode/electrolyte side reactions by preventing electrode particles from being directly exposed to the electrolyte. As a result, the discharge capacity of the modified LMR material is 153.1 mAh g−1 at 5 C compared to 139.1 mAh g−1 with the pristine material. The capacity retention of the modified material is 82.8 % after 200 cycles at 1 C, which is higher than the 77.1 % capacity retention of the pristine material. X‐ray photoelectron spectroscopy (XPS) reveals that the CeO2 coating layer has a significant role in mitigating oxygen release from the surface of the LMR material during cycling.

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“…Intensive research has been conducted to improve the electrochemical properties of Li-rich layered oxides by using surface coating [19][20][21], mild acidic treatment [22,23], and ionic substitution [23][24][25][26][27]. Surface coating is a feasible approach used to improve the cycling stability and rate capability of Li-rich layered oxides.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of Li-rich Li[Li0.2Mn0.52Ni0.13Co0.13V0.02]O2 cathode materials for lithium ion batteries by Li1.13Mn0.47Ni0.2Co0.2O2 coating

Zhao

Sun

Song

et al. 2020

Ionics

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Li-rich layered oxides are the most promising cathode candidate for lithium ion batteries with high specific energy. In this work, Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 -coated Li [Li 0.2 Mn 0.52 Ni 0.13 Co 0.13 V 0.02 ]O 2 cathode materials were synthesized via a sol-gel method, and their electrochemical performance was evaluated. Structural and morphological characterizations of the materials demonstrate that Li[Li 0.2 Mn 0.52 Ni 0.13 Co 0.13 V 0.02 ]O 2 particles are covered by Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 particles. Moreover, the Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 coating has no obvious effect on the crystal structure of Li-rich materials. The specific capacity, cycle performance, and rate capability of Li-rich materials are significantly improved with the coating of Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 . Materials coated with 1 wt% to 3 wt% Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 exhibit the highest capacity retention of 93% after 100 cycles at 1 C, which is 10% higher than that of the uncoated one. The specific capacity of 3 wt% Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 -coated material is 115.9 mAh g −1 at 5 C, and that of the blank sample is 89.8 mAh g −1 under the same condition. The cyclic voltammetry and electrochemical impedance spectra reveal that the enhanced cycle performance and rate capability of the surface-modified Li-rich materials are due to the presence of the Li 1.13 Mn 0.47 Ni 0.2 Co 0.2 O 2 coating layer, which restrains structural transformation with cycling and decreases the charge-transfer resistance of the materials.

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Enhanced performance of layered Li1.2Mn0.54Ni0.13Co0.13O2 cathode material in Li-ion batteries using nanoscale surface coating with fluorine-doped anatase TiO2

Cited by 34 publications

References 65 publications

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Enhanced Electrochemical Performance of Li‐ and Mn‐Rich Cathode Materials by Particle Blending and Surface Coating

Enhanced electrochemical performance of Li-rich Li[Li0.2Mn0.52Ni0.13Co0.13V0.02]O2 cathode materials for lithium ion batteries by Li1.13Mn0.47Ni0.2Co0.2O2 coating

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