Advanced High‐Voltage All‐Solid‐State Li‐Ion Batteries Enabled by a Dual‐Halogen Solid Electrolyte

Zhang, Shumin; Zhao, Feipeng; Wang, Shuo; Liang, Jianwen; Wang, Jian; Wang, Changhong; Zhang, Hao; Adair, Keegan R.; Li, Weihan; Li, Minsi; Duan, Hui; Zhao, Yang; Yu, Ruizhi; Li, Ruying; Huang, Huan; Zhang, Li; Zhao, Shangqian; Lu, Shigang; Sham, Tsun‐Kong; Mo, Yifei; Sun, Xueliang

doi:10.1002/aenm.202100836

Cited by 73 publications

(97 citation statements)

References 55 publications

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“…Correspondingly, the moisture absorption results in Figure 2a shows little difference between the two, which may because that Li 3 InCl 6 powder is soft and can be completely densified under 300 MPa. [11] Moreover, the masstime curves of Li 3 InCl 6 powder and Li 3 InCl 6 pellet (400 Mpa) are shown in Figure 2c (the ordinate is normalized by mass). The slope of Li 3 InCl 6 powder curve is much larger than that of Li 3 InCl 6 pellet (400 Mpa), indicating that the water absorption rate of Li 3 InCl 6 decreases from powder to pellet.…”

Section: Resultsmentioning

confidence: 99%

Air Sensitivity and Degradation Evolution of Halide Solid State Electrolytes upon Exposure

Wang

Cui

et al. 2021

Adv Funct Materials

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Halide solid state electrolytes (SSEs) have attracted the attention of researchers as a new family of SSEs due to simple synthesis, high ionic conductivity, and good softness. However, until now, most of the reported works are focused on promotion of ionic conductivity, and little attention is paid to their air stability and degradation mechanism upon exposure. Herein, the degradation evolution of typical halide SSEs upon moisture is investigated in detail. It is found both Li 3 InCl 6 and Li 3 YCl 6 halide SSEs are easy to absorb water and deteriorate, and the air sensitivity is closely related to the contact area with air. In comparison, the water absorption rate of Li 3 InCl 6 is faster than that of Li 3 YCl 6 , while the amount of water absorption of Li 3 YCl 6 is larger than that of Li 3 InCl 6 , due to the higher solubility of InCl 3 compared to YCl 3 . Along with water absorption, Li 3 InCl 6 first forms a crystalline hydrate, then partially decomposes to InCl 3 and LiCl, and InCl 3 further hydrolyzes and produces acid which is corrosive; finally In 2 O 3 impurities are formed. Coating the surface of Li 3 InCl 6 with Al 2 O 3 can effectively improve the air stability. This work can help to understand the degradation mechanism of halide SSEs and provide guidance for the future design of new halide SSEs.

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Section: Resultsmentioning

confidence: 99%

Air Sensitivity and Degradation Evolution of Halide Solid State Electrolytes upon Exposure

Wang

Cui

et al. 2021

Adv Funct Materials

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“…Along with high ionic conductivity, the excellent electrochemical stability of HSEs in a 2.8-4.3 V window suggests the feasibility of 4 V-class cathode materials, without any additional coatings for SSBs. Zhang et al [325] reported and designed the incorporation of F for HSEs of Li 3 InCl 4.8 F 1.2 and LIC, to form a dual-halogen SE. Li 3 InCl 4.8 F 1.2 reported ionic conductivity over 10 −4 S cm −1 at RT, and exhibits a practical anodic limit at 6 V. The incorporation of a Li 3 InCl 4.8 F 1.2 cathode SE with LCO (In//Li 6 PS 5 Cl// LIC HSEs//Li 3 InCl 4.8 F 1.2 /LCO, voltage range of 2.6-4.47 V (vs Li/Li + )) enabled HV SSBs with better electrochemical performance (Figure 13a,b).…”

Section: Halide Solid Electrolytes (Hses)mentioning

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

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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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“…[ 26 ] Halide SSEs can even be synthesized by a facile wet‐chemistry method using water as a solvent. [ 27,28 ] Furthermore, halide SSEs, especially chlorides and fluorides, exhibit wide electrochemical windows among all types of SSEs, which have been proven by theoretical [ 12,29 ] and experimental [ 30,31 ] studies. Until now, all the solid‐state batteries in the halide SSEs system are still focused on traditional oxide cathodes.…”

Section: Introductionmentioning

confidence: 99%

“…Until now, all the solid-state batteries in the halide SSEs system are still focused on traditional oxide cathodes. [17,19,25,31,32] While there have been predictions that halide SSEs can be used to explore the reversible storage of Li + into new compounds other than oxide cathodes.…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Halide‐Electrolyte‐Based All‐Solid‐State Li–Se Batteries

Liang

Kim

et al. 2022

Advanced Materials

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Solid‐state Li–S and Li–Se batteries are promising devices that can address the safety and electrochemical stability issues that arise from liquid‐based systems. However, solid‐state Li–Se/S batteries usually present poor cycling stability due to the high resistance interfaces and decomposition of solid electrolytes caused by their narrow electrochemical stability windows. Here, an integrated solid‐state Li–Se battery based on a halide Li3HoCl6 solid electrolyte with high ionic conductivity is presented. The intrinsic wide electrochemical stability window of the Li3HoCl6 and its stability toward Se and the lithiated species effectively inhibit degeneration of the electrolyte and the Se cathode by suppressing side reactions. The inherent thermodynamic mechanism of the lithiation/delithiation process of the Se cathode in solid is also revealed and confirmed by theoretical calculations. The battery achieves a reversible capacity of 402 mAh g−1 after 750 cycles. The electrochemical performance, thermodynamic lithiation/delithiation mechanism, and stability of metal‐halide‐based Li–Se batteries confer theoretical study and practical applicability that extends to other energy‐storage systems.

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Advanced High‐Voltage All‐Solid‐State Li‐Ion Batteries Enabled by a Dual‐Halogen Solid Electrolyte

Cited by 73 publications

References 55 publications

Air Sensitivity and Degradation Evolution of Halide Solid State Electrolytes upon Exposure

Air Sensitivity and Degradation Evolution of Halide Solid State Electrolytes upon Exposure

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

Highly Stable Halide‐Electrolyte‐Based All‐Solid‐State Li–Se Batteries

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