Surface modification of cathode materials for energy storage devices: A review

Chaudhary, Manika; Tyagi, Shrestha; Gupta, Ram K.; Singh, Beer; Singhal, Rahúl

doi:10.1016/j.surfcoat.2021.127009

Cited by 34 publications

(23 citation statements)

References 200 publications

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“…To overcome these drawbacks, studies on surface modification including the formation of thin artificial layers such as electrochemically inert metal oxides ( e.g. , Al 2 O 3 , AlF 3 , and ZrO 2 ) − and a solid-solution outer layer (SSOL) , have attracted attention, as they are expected to prevent the aforementioned side reactions by protecting the surface. − …”

Section: Introductionmentioning

confidence: 99%

Effects of a Solid Solution Outer Layer of TiO₂ on the Surface and Electrochemical Properties of LiNi_0.6Co_0.2Mn_0.2O₂ Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Wang

Lee

et al. 2022

ACS Appl. Energy Mater.

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Thin-film electrodes are considered to be desirable for understanding the detailed surface characteristics of active materials for rechargeable batteries. This study attempts to elucidate the effects of a solid solution outer layer (SSOL) of TiO2 on the surface and electrochemical properties of LiNi0.6Co0.2Mn0.2O2 (NCM622) cathodes by using thin-film electrodes synthesized by a spin-coating technique. The SSOL phase is induced on the NCM622 thin-film surface by a post-annealing process after the TiO2 coating using atomic layer deposition. Structural and morphological analyses revealed that the bare NCM622 thin-film electrode without a thin SSOL has a spinel-like derivative phase induced by an oxygen vacancy at the surface, which is considered to be the crucial factor for the poor electrochemical properties of Ni-rich NCM. In particular, additional measurements including in situ Raman spectroscopy revealed that the spinel-like derivative phase rapidly makes the surface structure become corrupt and change to the amorphous state during electrochemical reactions. In contrast, the oxygen vacancy can be eliminated by forming a SSOL phase at the surface of the NCM622 thin-film through the rapid migration of Ni, Ti, and O atoms during the post-annealing process, significantly enhancing the structural stability, which ultimately improves the electrochemical performance, including cyclability and Coulombic efficiency.

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Section: Introductionmentioning

confidence: 99%

Effects of a Solid Solution Outer Layer of TiO₂ on the Surface and Electrochemical Properties of LiNi_0.6Co_0.2Mn_0.2O₂ Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Wang

Lee

et al. 2022

ACS Appl. Energy Mater.

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“…protective layer could provide an immediate effect to stabilize the surface structure to survive extended cycles. [133,134] In this regard, surface coating has been intensively investigated to tackle the stability challenge of the HV-LCO. It is noted that the surface chemistry of cathode materials is usually determined by a large variety of parameters especially at the existence of an outer protection layer, which includes but not limited to the thickness, coverage, physicochemistry of the surface species.…”

Section: Surface Treatmentmentioning

confidence: 99%

Advancing to 4.6 V Review and Prospect in Developing High‐Energy‐Density LiCoO₂ Cathode for Lithium‐Ion Batteries

Zhang

Guo

et al. 2022

Small Methods

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Layered LiCoO2 (LCO) is one of the most important cathodes for portable electronic products at present and in the foreseeable future. It becomes a continuous push to increase the cutoff voltage of LCO so that a higher capacity can be achieved, for example, a capacity of 220 mAh g–1 at 4.6 V compared to 175 mAh g–1 at 4.45 V, which is unfortunately accompanied by severe capacity degradation due to the much‐aggravated side reactions and irreversible phase transitions. Accordingly, strict control on the LCO becomes essential to combat the inherent instability related to the high voltage challenge for their future applications. This review begins with a discussion on the relationship between the crystal structures and electrochemical properties of LCO as well as the failure mechanisms at 4.6 V. Then, recent advances in control strategies for 4.6 V LCO are summarized with focus on both bulk structure and surface properties. One closes this review by presenting the outlook for future efforts on LCO‐based lithium ion batteries (LIBs). It is hoped that this work can draw a clear map on the research status of 4.6 V LCO, and also shed light on the future directions of materials design for high energy LIBs.

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“…However, these types of cathode materials still suffer from similar problems, which limit their further development [ 13 ]. To overcome issues of low specific capacity and poor cycling stability in the cathode materials, it has been reported that surface coating is an effective and economical method [ 14 ]. Carbon-based materials are a good choice to utilize for coatings, due to their excellent chemical stability and physical properties.…”

Section: Introductionmentioning

confidence: 99%

Carbon-Coatings Improve Performance of Li-Ion Battery

2022

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The development of lithium-ion batteries largely relies on the cathode and anode materials. In particular, the optimization of cathode materials plays an extremely important role in improving the performance of lithium-ion batteries, such as specific capacity or cycling stability. Carbon coating modifying the surface of cathode materials is regarded as an effective strategy that meets the demand of Lithium-ion battery cathodes. This work mainly reviews the modification mechanism and method of carbon coating, and summarizes the recent progress of carbon coating on some typical cathode materials (LiFePO4, LiMn2O4, LiCoO2, NCA (LiNiCoAlO2) and NCM (LiNiMnCoO2)). In addition, the limitations of the carbon coating on the cathode are also introduced. Suggestions on improving the effectiveness of carbon coating for future study are also presented.

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Surface modification of cathode materials for energy storage devices: A review

Cited by 34 publications

References 200 publications

Effects of a Solid Solution Outer Layer of TiO₂ on the Surface and Electrochemical Properties of LiNi_0.6Co_0.2Mn_0.2O₂ Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Effects of a Solid Solution Outer Layer of TiO₂ on the Surface and Electrochemical Properties of LiNi_0.6Co_0.2Mn_0.2O₂ Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Advancing to 4.6 V Review and Prospect in Developing High‐Energy‐Density LiCoO₂ Cathode for Lithium‐Ion Batteries

Carbon-Coatings Improve Performance of Li-Ion Battery

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Surface modification of cathode materials for energy storage devices: A review

Cited by 34 publications

References 200 publications

Effects of a Solid Solution Outer Layer of TiO2 on the Surface and Electrochemical Properties of LiNi0.6Co0.2Mn0.2O2 Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Effects of a Solid Solution Outer Layer of TiO2 on the Surface and Electrochemical Properties of LiNi0.6Co0.2Mn0.2O2 Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Advancing to 4.6 V Review and Prospect in Developing High‐Energy‐Density LiCoO2 Cathode for Lithium‐Ion Batteries

Carbon-Coatings Improve Performance of Li-Ion Battery

Contact Info

Product

Resources

About

Effects of a Solid Solution Outer Layer of TiO₂ on the Surface and Electrochemical Properties of LiNi_0.6Co_0.2Mn_0.2O₂ Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Effects of a Solid Solution Outer Layer of TiO₂ on the Surface and Electrochemical Properties of LiNi_0.6Co_0.2Mn_0.2O₂ Cathodes for Lithium-Ion Batteries through the Use of Thin-Film Electrodes

Advancing to 4.6 V Review and Prospect in Developing High‐Energy‐Density LiCoO₂ Cathode for Lithium‐Ion Batteries