An artificially tailored functional layer on Li-rich layer cathodes enables a stable high-temperature interphase for Li-ion batteries

Yang, Yaru; Sun, Gang; Zhu, Qingjun; Jiang, Yunshan; Wang, Ke; Wang, Panpan; Zhao, Yang; Zhang, Wang; Wang, Zhen‐Bo

doi:10.1039/d2ta07316a

Cited by 17 publications

(6 citation statements)

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“…Dissolved TMs react with F-ions to generate a TMF 2 layer, continuously depositing onto the surface of the active site and forming an uneven CEI layer. This uneven layer significantly hampers ion transport, thereby diminishing battery performance . The dissolution of TMs, a pivotal factor contributing to the deterioration of positive electrode materials, was investigated using ICP-OES .…”

Section: Resultsmentioning

confidence: 99%

“…This uneven layer significantly hampers ion transport, thereby diminishing battery performance. 52 The dissolution of TMs, a pivotal factor contributing to the deterioration of positive electrode materials, was investigated using ICP-OES. 53 After 100 cycles at elevated temperatures via the RF method, the contents of Ni, Co, and Mn on lithium tablets were 0.0004, 0.0021, and 0.1208 mg/L, respectively, which were lower than 0.0005, 0.0035, and 0.2122 mg/L through the NF method.…”

Section: Electrochemical Performances Of Lnmc622||limentioning

confidence: 99%

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Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi_0.6Mn_0.2Co_0.2O₂ Cathode at Elevated Temperatures

Li,

Yang,

Quan

et al. 2024

ACS Appl. Mater. Interfaces

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Layered ternary oxide LiNi x Mn y Co1–x–y O2 is a promising cathode candidate for high-energy lithium-ion batteries (LIBs). However, the capacity of LIBs is significantly restricted by several factors, including the repeated dissolution-regeneration of the interfacial film at high temperatures, the dissolution of transition metals, and the increase of impedance. Herein, a new precycling strategy in suitable voltage scope at room temperature is proposed to construct a uniform, thermally stable, and insoluble cathode-electrolyte interface (CEI), which helps to maintain stable cycling performances at high temperatures. Specifically, after 5 precycles in the range of 3.85–4.3 V at room temperature, a CEI layer containing numerous inorganic components and oligomers is formed on the surface of LiNi0.6Mn0.2Co0.2O2. Subsequently, the harmful side reactions are effectively suppressed, endowing the cell with an excellent capacity retention of 84.67% after 50 cycles at 0.5C and 55 °C, much higher than that of 65.61% under the conventional film-forming process conditions. This work emphasizes the crucial role of the precycling strategy in regulating the characteristics of CEI layer on the surface of cathode electrode, opening up a new avenue for the high-temperature application of positive electrodes of LIBs.

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Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Performances Of Lnmc622||limentioning

confidence: 99%

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi_0.6Mn_0.2Co_0.2O₂ Cathode at Elevated Temperatures

Li,

Yang,

Quan

et al. 2024

ACS Appl. Mater. Interfaces

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“…[1][2][3][4] The choice of electrode materials is crucial to the battery's overall performance. [5][6][7] Therefore, people have developed various electrode materials, such as carbon-based materials, [8][9][10] silicon-based materials, 11,12 titaniumbased materials, 2,13 vanadium-based materials, [14][15][16][17][18] and so forth. [19][20][21][22] Among a variety of electrode materials, vanadiumbased sulfides have attracted much attention attributed to their high capacity and abundant valence states.…”

Section: Introductionmentioning

confidence: 99%

Dual‐functional and polydopamine‐coated vanadium disulfide for “fast‐charging” lithium‐ion batteries

Wang,

Dang,

et al. 2024

Battery Energy

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As a typical representative of vanadium‐based sulfides, vanadium disulfide has attracted the attention of researchers ascribed to its high theoretical capacity and unique crystal structure. However, overcoming its structural collapse while achieving dual functionalization that serves as both active material and binder remains challenging. This study designs a dopamine‐coating vanadium disulfide core‐shell structure through the synergistic effect of V‐O bonds and hydrogen bonds between vanadium disulfide and dopamine, which is further employed as a dual‐function electrode material. The polydopamine‐coated vanadium disulfide without binder exhibits specific capacity of 682.03 mAh g−1, and the Coulombic efficiency of 99.78% at a current density of 200 mA g−1 after 400 cycles. More importantly, at a larger current density of 1000 mA g−1, the specific capacity is 385.44 mAh g−1 after 1500 cycles. After 3150 cycles, the specific capacity is 200.32 mAh g−1 at 2000 mA g−1. Electrochemical kinetics analysis displays that the polydopamine‐coated vanadium disulfide without binder exhibits fast ion‐diffusion kinetics, with the order of magnitude of ion‐diffusion coefficients ranging from 10−11 to 10−12. This kind of material has the potential to be a significantly promising electrode material for “fast‐charging” lithium‐ion batteries.

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“…For example, it has been reported that the retention capacity of current commercial lithium-ion batteries (LIBs) at −40 °C is only 12% of the room temperature value . On the contrary, if the electrochemical reactions of LIBs are exposed to a high-temperature environment for a long time, it will also exacerbate the metal dissolution and lattice oxygen release in the electrode material, accompanied by the materials’ irreversible structural transformation . Fewer studies have been able to incorporate temperature variations into the operando characterization apparatus.…”

mentioning

confidence: 99%

Temperature-Tunable Operando Nondestructive Detection of Electronic and Geometrical Structures in Battery Electrodes

Huang,

Cao,

Mao

et al. 2024

Anal. Chem.

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Real-time monitoring of the structural evolution of battery materials is crucial for understanding their underlying reaction mechanisms, which cannot be satisfied by the typically used post-mortem analysis. While more and more operando techniques were constructed and employed, they are all based on ambient working conditions that are not generally the case for realworld applications. Indeed, batteries work in an environment where self-heat dissipation increases the surrounding temperature, and extreme temperature applications (<−20 °C or >60 °C) are also frequently proposed. Operando characterization techniques under variable temperatures are therefore highly desired for tracking battery reactions under real-working conditions. Here, we develop a methodology to operando monitor the electronic and geometrical structures of battery materials over a wide range of temperatures based on X-ray spectroscopies. It is substantiated with data collected on a model LiNi 0.90 Co 0.05 Mn 0.05 O 2 /Si@C pouch cell under operando quick X-ray absorption fine structure spectroscopy, by which we found a temperature-dependent structure evolution behavior that is highly correlated with the electrochemical performance. Our work establishes an exemplary protocol for analyzing battery materials under temperature-variable environments that can be widely used in other related fields.

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An artificially tailored functional layer on Li-rich layer cathodes enables a stable high-temperature interphase for Li-ion batteries

Abstract: The unstable electrode-electrolyte interphase, poor rate capability, and severe lattice oxygen release of Li-rich layer oxides (LRNCM) severely limit their commercial application. Herein, an ultrathin Li2SiO3 (LSO) protective layer with...

Cited by 17 publications

References 70 publications

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi_0.6Mn_0.2Co_0.2O₂ Cathode at Elevated Temperatures

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi_0.6Mn_0.2Co_0.2O₂ Cathode at Elevated Temperatures

Dual‐functional and polydopamine‐coated vanadium disulfide for “fast‐charging” lithium‐ion batteries

Temperature-Tunable Operando Nondestructive Detection of Electronic and Geometrical Structures in Battery Electrodes

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An artificially tailored functional layer on Li-rich layer cathodes enables a stable high-temperature interphase for Li-ion batteries

Abstract: The unstable electrode-electrolyte interphase, poor rate capability, and severe lattice oxygen release of Li-rich layer oxides (LRNCM) severely limit their commercial application. Herein, an ultrathin Li2SiO3 (LSO) protective layer with...

Cited by 17 publications

References 70 publications

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi0.6Mn0.2Co0.2O2 Cathode at Elevated Temperatures

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi0.6Mn0.2Co0.2O2 Cathode at Elevated Temperatures

Dual‐functional and polydopamine‐coated vanadium disulfide for “fast‐charging” lithium‐ion batteries

Temperature-Tunable Operando Nondestructive Detection of Electronic and Geometrical Structures in Battery Electrodes

Contact Info

Product

Resources

About

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi_0.6Mn_0.2Co_0.2O₂ Cathode at Elevated Temperatures

Precycling Strategy in Suitable Voltage to Improve the Stability of Interfacial Film and Suppress the Decline of LiNi_0.6Mn_0.2Co_0.2O₂ Cathode at Elevated Temperatures