High Lithium-Ion Conductivity, Halide-Coated, Ni-Rich NCM Improves Cycling Stability in Sulfide All-Solid-State Batteries

Wang, Jing; Zhao, Shangqian; Zhang, Anbang; Zhuo, Haoxiang; Zhang, Gangning; Han, Fujuan; Zhang, Yi; Tang, Ling; Yang, Rong; Wang, Lijun; Lu, Shigang

doi:10.1021/acsaem.2c02774

Cited by 14 publications

(14 citation statements)

References 34 publications

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“…[83][84][85] Surface modification strategies, such as sticky binder-like coatings or highly conductive and stable solid electrolyte coatings, have demonstrated considerable potential in recent studies. [31,86] These strategies can be employed alongside additives or pressure controls to achieve the desired outcome.…”

Section: Specialized Cathode Surface Modification With Solid-based El...mentioning

confidence: 99%

“…[30] With specialized coating strategies, which effectively establish contact between cathode materials and the solid electrolyte (SE), progress has been made on continuously suppressing the interfacial resistance. [31,32] Herein, this review outlines coating strategies to mitigate the degradation of Ni-rich layered cathode materials in LIBs and ASSLBs systems. The coatings are categorized into traditional, advanced, and specialized methods based on the electrolyte type employed.…”

Section: Introductionmentioning

confidence: 99%

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A Perspective on the Requirements of Ni‐rich Cathode Surface Modifications for Application in Lithium‐ion Batteries and All‐Solid‐State Lithium‐ion Batteries

Choi,

Embleton,

et al. 2024

ChemElectroChem

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The increasing adoption of Ni‐rich cathode active materials in commercial liquid electrolyte Lithium‐ion batteries (LIBs) is testament to the improvements in the cathode stability through various surface modification strategies. The development of a deeper understanding of the cathode/electrolyte interface in LIBs has resulted in coatings capable of mitigating both surface and bulk cathode degradation mechanisms. However, due to increasing demands for safe and high energy density cells, a large portion of the research has now shifted towards applying Ni‐rich cathode active materials in inherently safer all‐solid‐state Lithium‐ion batteries (ASSLBs), with the resulting cathode surface modification strategies evolving differently. In this regard, a review outlining the surface modification strategies of Ni‐rich cathode materials applied in both LIB and ASSLB systems is provided. Within, a review of the traditional, advanced and specialized surface modification strategies of each system is discussed, along with a final perspective on the likely future direction of research regarding the design of system‐specific Ni‐rich cathode‐based surface modification strategies.

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Section: Specialized Cathode Surface Modification With Solid-based El...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Perspective on the Requirements of Ni‐rich Cathode Surface Modifications for Application in Lithium‐ion Batteries and All‐Solid‐State Lithium‐ion Batteries

Choi,

Embleton,

et al. 2024

ChemElectroChem

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“…Therefore, from the perspective of battery design, developing safer and more stable electrolytes (Han et al, 2023) or using solid-state electrolytes (J. Wang et al, 2023) are also important measures to prevent accidents.In summary, the exothermic reaction associated with the negative electrode exhibits significant heat generation over a long period, while the reaction associated with the positive electrode Experimental phenomena and temperature-voltage curve of cell heating test.…”

Section: Trigger Heat Production Characteristics Of Cellmentioning

confidence: 99%

Study on the electrical-thermal properties of lithium-ion battery materials in the NCM622/graphite system

Li,

Wu,

Fang

et al. 2024

Front. Chem.

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The phenomenon of fire or even explosion caused by thermal runaway of lithium-ion power batteries poses a serious threat to the safety of electric vehicles. An in-depth study of the core-material thermal runaway reaction mechanism and reaction chain is a prerequisite for proposing a mechanism to prevent battery thermal runaway and enhance battery safety. In this study, based on a 24 Ah commercial Li(Ni0.6Co0.2Mn0.2)O2/graphite soft pack battery, the heat production characteristics of different state of charge (SOC) cathode and anode materials, the separator, the electrolyte, and their combinations of the battery were investigated using differential scanning calorimetry. The results show that the reaction between the negative electrode and the electrolyte is the main mode of heat accumulation in the early stage of thermal runaway, and when the heat accumulation causes the temperature to reach a certain critical value, the violent reaction between the positive electrode and the electrolyte is triggered. The extent and timing of the heat production behaviour of the battery host material is closely related to the SOC, and with limited electrolyte content, there is a competitive relationship between the positive and negative electrodes and the electrolyte reaction, leading to different SOC batteries exhibiting different heat production characteristics. In addition, the above findings are correlated with the battery failure mechanisms through heating experiments of the battery monomer. The study of the electro-thermal properties of the main materials in this paper provides a strategy for achieving early warning and suppression of thermal runaway in batteries.

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“…Subsequently, all-solid-state batteries (ASSBs) composed of solid electrolytes have emerged as a technology that can revolutionize the field of batteries. Inorganic solid electrolytes (such as oxides, sulfides, and halides) exhibit a low ignition risk, thereby ensuring safety, even under extreme conditions. − The advancement and implementation of ASSBs could address the low safety of LIB-based systems, facilitating progress and innovation in the electric-vehicle industry.…”

Section: Introductionmentioning

confidence: 99%

Improving Interfacial Stability for All-Solid-State Secondary Batteries with Precursor-Based Gradient Doping

Ji,

Park

2024

ACS Omega

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Recently, sulfide solid-state electrolytes with excellent ionic conductivity and facile electrode integration have gained prominence in the field of all-solid-state batteries (ASSBs). However, owing to their inherently high reactivity, sulfide electrolytes interact with the cathode, forming interfacial layers that adversely affect the electrochemical performance of all-solid-state cells. Unlike conventional cathode-coating methods that involve the formation of surface coatings from high-cost source materials, the proposed strategy involves the doping of precursors with lowcost oxides (Nb 2 O 5 , Ta 2 O 5 , and La 2 O 3 ) prior to cathode fabrication. This novel approach aims to improve the stability of the cathode−sulfide electrolyte interface. Notably, doping significantly improved the discharge capacity, rate capability, and cyclic performance of cathodes while reducing their impedance resistance. Scanning electron microscopy, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) indicated a gradient dopant− concentration profile (with a high level of dopant at the surface) in the doped cathodes. Cathode doping, particularly with Nb and Ta, caused a reduction in cation mixing owing to crystalstructure adjustments and ionic-conductivity enhancements. XPS and high-resolution TEM confirmed that gradient doping effectively minimized cathodic side reactions, possibly due to the formation of a coating-like protective layer in the cathode− electrolyte interface coupled with structural stabilization attributed to the doping process. The protective ability of the interfacial layer generated by gradient doping was confirmed to be comparable to that of conventional surface coatings. Therefore, this study could guide the future development of low-cost, high-performance ASSBs, opening new frontiers in sustainable energy storage.

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High Lithium-Ion Conductivity, Halide-Coated, Ni-Rich NCM Improves Cycling Stability in Sulfide All-Solid-State Batteries

Cited by 14 publications

References 34 publications

A Perspective on the Requirements of Ni‐rich Cathode Surface Modifications for Application in Lithium‐ion Batteries and All‐Solid‐State Lithium‐ion Batteries

A Perspective on the Requirements of Ni‐rich Cathode Surface Modifications for Application in Lithium‐ion Batteries and All‐Solid‐State Lithium‐ion Batteries

Study on the electrical-thermal properties of lithium-ion battery materials in the NCM622/graphite system

Improving Interfacial Stability for All-Solid-State Secondary Batteries with Precursor-Based Gradient Doping

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