Chemical stability of sulfide solid-state electrolytes: stability toward humid air and compatibility with solvents and binders

Nikodimos, Yosef; Huang, Chen‐Jui; Taklu, Bereket Woldegbreal; Su, Wei‐Nien; Hwang, Bing‐Joe

doi:10.1039/d1ee03032a

Cited by 164 publications

(118 citation statements)

References 233 publications

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“…However, the main challenges associated with the commercialization and processing of SSEs are their instability toward air/moisture, as well as Li metal, which leads to complex processing requirements. [329,330] In the following section, we discuss the most recent SSEs and considerations regarding development of high voltage applications.…”

Section: Ssesmentioning

confidence: 99%

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Perspectives on Improving the Safety and Sustainability of High Voltage Lithium‐Ion Batteries Through the Electrolyte and Separator Region

Cavers

Molaiyan

Abdollahifar

et al. 2022

Advanced Energy Materials

105

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Lithium‐ion batteries (LIBs) are promising candidates within the context of the development of novel battery concepts with high energy densities. Batteries with high operating potentials or high voltage (HV) LIBs (>4.2 V vs Li+/Li) can provide high energy densities and are therefore attractive in high‐performance LIBs. However, a variety of challenges (including solid electrolyte interface (SEI), lithium plating, etc.) and related safety issues (such as gas formation or thermal runaway effects) must be solved for the practical, widespread application of HV‐LIBs. Most of these challenges arise in the region between the electrodes: the electrolyte region. This review provides an overview of recent development and progress on the electrolyte region, including liquid electrolytes, ionic liquids, gel polymer electrolytes, separators, and solid electrolytes for HV‐LIBs applications. A focus on improving the safety of these systems, with some perspectives on their relative cost and environmental impact, is given. Overall, the new information is encouraging for the development of HV‐LIBs, and this review serves as a guide for potential strategies to improve their safety, allowing the development of HV‐LIBs, including solid‐state batteries, to be accelerated to practical relevance.

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Section: Ssesmentioning

confidence: 99%

“…Additionally, SEs can still be subject to safety issues, especially in abuse cases, and quantitative safety analysis of SEs is still necessary. [330,357] That being said, advanced HV battery systems based on SEs would revitalize the battery field, due to their safety, good stability, ecological impact, long cycles, and low cost.…”

Section: Ssesmentioning

confidence: 99%

Perspectives on Improving the Safety and Sustainability of High Voltage Lithium‐Ion Batteries Through the Electrolyte and Separator Region

Cavers

Molaiyan

Abdollahifar

et al. 2022

Advanced Energy Materials

105

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“…[36] However, the sulfide electrolytes are easily hydrolyzed or oxidized to form toxic H 2 S in ambient air, leading to the whole synthesis procedures are highly dependent on a dry protective atmosphere. [37][38][39][40] Therefore, it is highly desirable to develop the air-stable sulfide electrolytes or improve the stability of these reported electrolytes against moist air. In this review, we briefly introduce several important families of sulfide electrolytes in Section 2.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances and Perspectives of Air Stable Sulfide‐Based Solid Electrolytes for All‐Solid‐State Lithium Batteries

Shi

et al. 2022

The Chemical Record

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An all-solid-state battery enabled by the incombustible and highly Li-ion conductive sulfide solid-state electrolyte, is recognized to be a strong candidate for next-generation of lithium-ion batteries. Intensive research efforts have been devoted to developing the well-suited sulfide electrolytes with outstanding performances. Although several types of sulfide electrolytes have achieved superionic conductivities with excellent deformability, the air-sensitive behaviors of them are detrimental to the large-scale production. Considerable efforts are in progress to tackle this issue via various strategies in recent years. This review provides an overview of several classes of promising sulfide solid electrolytes. The principle and strategies for improving the resistance of these sulfide electrolytes against air are thoroughly discussed. We also point out the major challenges that all-solid-state batteries and different types of sulfide electrolytes face for practical applications.

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“…As electricity gradually accounts for an increasing share of energy supply, high energy density batteries with high safety performance have gradually become a focus of research. − All-solid-state lithium batteries (ASSLBs), using lithium metals as anodes and solid-state electrolytes (SSEs) as nonflammable electrolytes, can offer higher specific energy densities, longer cycle lives, and better safety than organic lithium batteries. In order to obtain ASSLBs with high energy densities, reducing the thickness of SSEs is imperative. − When the thickness of the SSEs is less than 50 μm, the energy density can be improved remarkedly .…”

Section: Introductionmentioning

confidence: 99%

An Ultrathin, Flexible Solid Electrolyte with High Ionic Conductivity Enhanced by a Mutual Promotion Mechanism

Gao

Sun

Cui

et al. 2022

ACS Appl. Mater. Interfaces

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The pursuit of strong endurance and nonflammable performances has promoted demand for solid-state batteries (SSBs). Meanwhile, the reduction of electrolytes' thickness is the key to improving battery performance. However, a large-scale feasible method to fabricate an ultrathin solid electrolyte exhibiting high ionic conductivities is still a challenge. Here, we show a large-scale feasible method to prepare a succinonitrile/polyacrylonitrile(SN/ PAN)-coated Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) with flexibility and high ionic conductivity by tape-casting. The unique dual polymer-coated garnet electrolytes exhibit structural stability through mutual promotion, constructing soft interparticle contact that provides fast lithium-ion transfer channels. In essence, the mutual promotion mechanism is that SN can improve the Li + conductivity of PAN, while PAN can protect SN from aggregation. Therefore, the flexible SN/ PAN-coated LLZTO provides high structural stability and satisfactory electrochemical performance, contributing to a high ionic conductivity of 4 × 10 −4 S cm −1 at room temperature (RT). In this way, a long lifespan of over 500 cycles and a high discharge capacity (163 mAh g −1 ) are achieved based on LiFePO4 (LFP) cathodes at 0.2 C.

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Chemical stability of sulfide solid-state electrolytes: stability toward humid air and compatibility with solvents and binders

Abstract: Sulfide solid electrolytes (S-SEs) based all-solid-state batteries (ASSBs) have received particular attention due to their outstanding ionic conductivity and higher energy density over conventional lithium-ion batteries. Nevertheless, chemical instability toward...

Cited by 164 publications

References 233 publications

Perspectives on Improving the Safety and Sustainability of High Voltage Lithium‐Ion Batteries Through the Electrolyte and Separator Region

Perspectives on Improving the Safety and Sustainability of High Voltage Lithium‐Ion Batteries Through the Electrolyte and Separator Region

Recent Advances and Perspectives of Air Stable Sulfide‐Based Solid Electrolytes for All‐Solid‐State Lithium Batteries

An Ultrathin, Flexible Solid Electrolyte with High Ionic Conductivity Enhanced by a Mutual Promotion Mechanism

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