Solid‐State Plastic Crystal Electrolytes: Effective Protection Interlayers for Sulfide‐Based All‐Solid‐State Lithium Metal Batteries

Wang, Changhong; Adair, Keegan R.; Liang, Jianwen; Li, Xiaona; Sun, Yipeng; Wang, Jiwei; Sun, Qian; Zhao, Feipeng; Lin, Xiaoting; Li, Ruying; Huang, Huan; Zhang, Li; Yang, Rong; Lu, Shigang; Sun, Xueliang

doi:10.1002/adfm.201900392

Cited by 181 publications

(121 citation statements)

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Section: Constitution Of Cpesmentioning

confidence: 99%

“…Therefore, Sun and co‐workers designed a kind of plastic crystal electrolyte (PCE) with SN dissolved with the LiTFSI salt. [ 99 ] PCE layer was placed as the interlayer to minimize the interfacial issue between the sulfide electrolyte and the Li metal anode. The X‐ray photoelectron spectroscopy results prove that the LGPS electrolyte is decomposed to Li 2 S, reduced P, and reduced Ge without the PCE interlayer, while no such products could be inspected for the PCE‐protected LGPS.…”

Section: Constitution Of Cpesmentioning

confidence: 99%

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Advances in Composite Polymer Electrolytes for Lithium Batteries and Beyond

Tang

Guo

2020

Advanced Energy Materials

206

149

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Conventional lithium‐ion batteries have approached their capacity and energy density limits. Use of lithium metal anode can enable high‐energy batteries. However, the safety hazards and lithium dendrite formation associated with lithium metal require safe electrolytes to replace flammable liquid ones. In recent years, solid‐state electrolytes have attracted tremendous attention. Among them, composite polymer electrolytes (CPEs) with different constitutions have the unique advantages of low interfacial resistance, high ionic conductivity, and flexible characteristics. Here, the basic properties and analysis methods related to CPEs are discussed. Following that, the components added into the polymer matrix, such as organic solvents, nanostructured ceramics, and fast‐ion‐conductive inorganics are classified. CPEs used in low‐cost Na and K batteries are briefly discussed. It is hoped that the review can supply both advances and fundamentals to the researchers in this field and provide guidance for the development of CPEs for lithium battery systems, and beyond.

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Section: Constitution Of Cpesmentioning

confidence: 99%

Section: Constitution Of Cpesmentioning

confidence: 99%

Advances in Composite Polymer Electrolytes for Lithium Batteries and Beyond

Tang

Guo

2020

Advanced Energy Materials

206

149

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“…The growth of Zn dendrites during the plating/stripping process not only causes the “loss” of reversible capacity, but also leads to seriously fading of the Coulombic efficiency and cycle life. Even worse, Zn dendrites normally grow up in the direction perpendicular to the surface of Zn metal, which is a potential safety hazard due to internal shorting failure of the battery after they pierce the separator . On the other hand, the wetting property of the electrode in aqueous media is limited, which has a severely impact on ion diffusion at the interface of electrode and electrolyte .…”

Section: Introductionmentioning

confidence: 99%

Toward High‐Performance Hybrid Zn‐Based Batteries via Deeply Understanding Their Mechanism and Using Electrolyte Additive

Hao

Long

et al. 2019

Adv Funct Materials

312

192

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Aqueous hybrid Zn-based batteries (ZIBs), as a highly promising alternative to lithium-ion batteries for grid application, have made considerable progress recently. However, few studies have been reported that investigate their working mechanism in detail. Here, the operando synchrotron X-ray diffraction is employed to thoroughly investigate the operational mechanism of a hybrid LiFePO 4 (LFP)/Zn battery, which indicates only Li + extraction/insertion from/ into cathode during cycling. Based on this system, a cheap electrolyte additive, sodium dodecyl benzene sulfonate, is proposed to effectively enhance its electrochemical properties. The influence of the additive on the Zn anode and LFP cathode is comprehensively studied, respectively. The results show that the additive modifies the intrinsic deposit pattern of Zn 2+ ions, rendering Zn plating/stripping highly reversible in an aqueous medium. On the other hand, the wettability of the LFP electrode is visibly a meliorated by introducing the surfactant additive, accelerating the Li-ion diffusion at the LFP electrode/ electrolyte interface, as indicated by the overpotential measurements. Benefiting from these effects, the Zn/LFP batteries deliver high rate capability and cycling stability in both coin cells and pouch cells.

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“…The SN-based PCE has long been known for its high RT ionic conductivity and nonflammability, which is considered to be a safe electrolyte. [33][34][35] PCE is prepared by simply adding bis(trifluoromethane)sulfonimide lithium salt (LiTFSI) into SN. From Figure 2d, we can clearly see that SN melts when heating to 60 °C and LiTFSI is dissolved completely.…”

mentioning

confidence: 99%

All‐Solid‐State Batteries with a Limited Lithium Metal Anode at Room Temperature using a Garnet‐Based Electrolyte

et al. 2020

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energy density, and cost effective. Albertus et al. have advocated for the use of limited lithium (≤30 µm) to ensure early identification of technical challenges associated with stable and dendrite-free cycling and a more rapid transition to commercially relevant designs. [7] And recently, Liu et al. [8] re-emphasized the importance of limited lithium and announced that 50 µm Li anode was required to reach a high energy of 300 Wh kg −1. Therefore, for practical lithium-metal batteries (LMBs), the utilization of thin Li metal anode with thicknesses <30 µm (<6 mAh cm −2) is extremely necessary. [6-10] In other words, the negative to positive electrode capacity ratio (N/P ratio) must be strictly restricted. Limiting the amount of Li metal anode is a great challenge, since it is highly reactive. The continuous reaction of Li metal with electrolyte to generate a solid electrolyte interphase (SEI) as well as the uneven Li platting to form dendrite growth and pulverized Li metal, which cause fast consumptions of Li metal and electrolyte, low Coulombic efficiency (CE), and short lifespan of LMBs. To improve cycling stability of Li metal anode in organic liquid electrolyte, various attempts have already been made, including highly concentrated electrolyte, [11] electrolyte additives, [12,13] external pressure, [14,15] Li host, [16,17] and surface coating. [18,19] While most of the above strategies use unlimited Li foil, only a few studies focus on limiting the amount of Li metal for LMBs. [6,9,20,21] For example, Niu et al. reported a self-smoothing Li-carbon anode based on the host of mesoporous carbon nanofibers and a high-energy LMB with a low N/P ratio of ≤2. [6] Archer's group and Cho's group achieved stable operations of LMBs composed of a high-loading cathode and a thin Li anode (20 µm) with Langmuir-Blodgett artificial SEIs. [9] While, compared with liquid electrolyte, some types of solid electrolytes are less reactive with Li metal, which may be good candidates for LMBs with low N/P ratios. [22] Additionally, the safety of LMBs can be greatly improved by replacing flammable liquid electrolyte with solid electrolyte. [23] But, up to now, there are only a few researches about all-solidstate lithium-metal batteries (ASSLMBs) using limited amount of Li metal anode. A recent work reported an ASSLMB with Li 6 PSCl sulfide electrolyte and Ag-C composite anode with no excess Li. [24] Besides, the studies of LiPON-based thin-film batteries with limited Li metal have been reported, which are Metallic lithium (Li), considered as the ultimate anode, is expected to promise high-energy rechargeable batteries. However, owing to the continuous Li consumption during the repeated Li plating/stripping cycling, excess amount of the Li metal anode is commonly utilized in lithium-metal batteries (LMBs), leading to reduced energy density and increased cost. Here, an all-solid-state lithium-metal battery (ASSLMB) based on a garnet-oxide solid electrolyte with an ultralow negative/positive electrode capacity ratio (N/P ratio) is reported...

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Solid‐State Plastic Crystal Electrolytes: Effective Protection Interlayers for Sulfide‐Based All‐Solid‐State Lithium Metal Batteries

Cited by 181 publications

References 50 publications

Advances in Composite Polymer Electrolytes for Lithium Batteries and Beyond

Advances in Composite Polymer Electrolytes for Lithium Batteries and Beyond

Toward High‐Performance Hybrid Zn‐Based Batteries via Deeply Understanding Their Mechanism and Using Electrolyte Additive

All‐Solid‐State Batteries with a Limited Lithium Metal Anode at Room Temperature using a Garnet‐Based Electrolyte

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