Pyrrolidinium‐PEG Ionic Copolyester: Li‐Ion Accelerator in Polymer Network Solid‐State Electrolytes

Choi, Young-Hyun; Shin, Jong Chan; Park, Anseong; Jeon, Young Min; Kim, Sang Hyun; Kim, Sebin; Kim, Seulwoo; Lee, Won Bo; Lee, Minjae; Park, Jae Hyung

doi:10.1002/aenm.202102660

Cited by 42 publications

(44 citation statements)

References 51 publications

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“…[136] As shown in Figure 13F, the LiCoO 2 /P 1000 PEG-SPE/Li cell delivered a much higher initial discharge capacity than the cells with N-SPE and LiCoO 2 /P400, 2000, 4000PEG-SPE/Li, maintaining a consistent specific capacity at a high current rate (123 mAh g −1 at 2 C and 107 mAh g −1 at 3 C, respectively). [136] Finally, Yu et al reported a wide-temperature superior ionic conductive polymer electrolyte for Li-metal batteries. [55] The polymer electrolyte prepared by in situ polymerization of vinyl ethylene carbonate.…”

Section: Solid-state Polymer-based Electrolytementioning

confidence: 87%

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Advanced Nonflammable Organic Electrolyte Promises Safer Li‐Metal Batteries: From Solvation Structure Perspectives

et al. 2023

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of our daily life from electronic gadgets to electrical vehicles (EVs) and large-scale energy storage. Especially, in recent years, the rapid popularization of EVs has further stimulated the demand of LIBs. [3] Unfortunately, with the increasing demand of LIBs, there are ever-growing concerns on the safety of LIBs given the possibility of thermal runaway of electrode materials in highly flammable and volatile liquid electrolyte. [4] Over the past several decades, several fatal accidents are caused by the spontaneous combustion of LIBs, taking several lives away. For example, in 2010, a UPS Boeing 747 cargo plane caught fire on board and then crashed in Dubai, killing both pilots. Later investigation suggests that the on-board fire was triggered by the spontaneous combustion of LIBs in the cargo hold. [5] As shown in Figure 1, over the past 10 years, with the rapid popularization of EVs, several EVs caught fires either during operation (charge or discharge) or during rest, leading to severe property damages and even casualties. [4] The main cause of these accidents can be classified into three categories: mechanic abuse such as crash or penetration, electrical abuse such as overcharge or external short circuit, and thermal abuse such as overheat. [4] All those abuse conditions result in the thermal runaway, which eventually leads to the smoke, fire, and explosion in the EVs.Compared with LIBs, Li-metal batteries with higher energydensity are far more dangerous. [6,7] Besides the potential Batteries with a Li-metal anode have recently attracted extensive attention from the battery communities owing to their high energy density. However, severe dendrite growth hinders their practical applications. More seriously, when Li dendrites pierce the separators and trigger short circuit in a highly flammable organic electrolyte, the results would be catastrophic. Although the issues of growth of Li dendrites have been almost addressed by various methods, the highly flammable nature of conventional organic liquid electrolytes is still a lingering fear facing high-energy-density Li-metal batteries given the possibility of thermal runaway of the high-voltage cathode. Recently, various kinds of nonflammable liquid-or solid-state electrolytes have shown great potential toward safer Li-metal batteries with minimal detrimental effect on the battery performance or even enhanced electrochemical performance. In this review, recent advances in developing nonflammable electrolyte for high-energy-density Li-metal batteries including high-concentration electrolyte, localized high-concentration electrolyte, fluorinated electrolyte, ionic liquid electrolyte, and polymer electrolyte are summarized. Then, the solvation structure of different kinds of nonflammable liquid and polymer electrolytes are analyzed to provide insight into the mechanism for dendrite suppression and fire extinguishing. Finally, guidelines for future design of nonflammable electrolyte for safer Li-metal batteries are provided.

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Section: Solid-state Polymer-based Electrolytementioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Advanced Nonflammable Organic Electrolyte Promises Safer Li‐Metal Batteries: From Solvation Structure Perspectives

et al. 2023

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“…Establishing an insulating layer on Zn metal from coating methods, for example, a gelatin‐based coating, polyacrylonitrile (PAN) coating, and a hydrophilic interface can immobilize the H 2 O molecule and anion near anodes and deliver dense zinc flux. [ 20–22 ] Anti‐corrosion protected layer by chemical passivation methods can effectively suppress the side‐reaction of Zn and become independent of surface smoothness requirements from the coating methods. [ 23 ] But, due to the strong binding of solvent and insulating features, polymer coating and passivation layer usually bring increasing polarization and reduce kinetics performance.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh‐Rate Zn Stripping and Plating by Capacitive Charge Carriers Enrichment Boosting Zn‐Based Energy Storage

Zhou

Xia

et al. 2023

Advanced Energy Materials

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Zn metal anodes, the key to aqueous zinc‐based energy storage, are plagued by dendrites and sluggish kinetics, which are closely related to the Zn plating process and restricted charge carriers exchange. Herein, a strategy of charge carriers enrichment during Zn plating by employing zincophilic carbon nanotubes (CNTs) on Zn electrodes for dendrite‐free Zn anodes under ultrahigh current density is reported. The CNTs enable an electric double layer to effectively facilitate the enrichment of charge carriers and the refinement of the electric field distribution at the CNTs–Zn interface, displaying unique advantages in enhancing Zn2+ transfer dynamics and planar Zn deposition. The extra capacitive interfacial process boosts Zn deposition kinetics to afford ultrahigh‐rate Zn plating and stripping by decreasing both electrochemical polarization and concentration polarization. As a consequence, reversible Zn stripping and plating at an ultrahigh current density of 50 mA cm−2 and a remarkable discharging depth of 97% are reached. Zn ion hybrid supercapacitors achieve stable cycling at 50 mA cm−2 for 10 000 cycles. This paper offers mechanistic insight for advanced Zn anodes supporting high‐rate charge/discharge with large capacities and enlightens the design of metal anodes.

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“…However, their brittleness and poor contact with the electrodes make them difficult to adapt to the present lithium battery manufacturing processes . In contrast, solid-state polymer electrolytes (SPEs) such as poly(ethylene oxide) (PEO), , poly(ethylene glycol) (PEG), , polyacrylonitrile (PAN), − poly(propylene carbonate) (PPC), , and poly(methyl methacrylate) (PMMA) , show better flexibility and interfacial compatibility with electrodes, making them easier to manufacture. However, low ionic conductivity at room temperature, low oxidation decomposition potential, and flammability limit the practical application of SPEs.…”

Section: Introductionmentioning

confidence: 99%

Organoboron- and Cyano-Grafted Solid Polymer Electrolytes Boost the Cyclability and Safety of High-Voltage Lithium Metal Batteries

Liu

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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Solid-state polymer electrolytes (SPEs) are deemed as a class of sought-after candidates for high-safety and high-energy-density solid-state lithium metal batteries, but their low ionic conductivity, narrow electrochemical windows, and severe interfacial deterioration limit their practical implementations. Herein, an organoboron- and cyano-grafted polymer electrolyte (PVNB) was designed using vinylene carbonate as the polymer backbone and organoboron-modified poly(ethylene glycol) methacrylate and acrylonitrile as the grafted phases, which may facilitate Li-ion transport, immobilize the anions, and enlarge the oxidation voltage window; therefore, the well-tailored PVNB exhibits a high Li-ion transference number (t Li+ = 0.86), a wide electrochemical window (>5 V), and a high ionic conductivity (σ = 9.24 × 10–4 S cm–1) at room temperature (RT). As a result, the electrochemical cyclability and safety of the Li|LiFePO4 and Li|LiNi0.8Co0.1Mn0.1O2 cells with in situ polymerization of PVNB are substantially improved by forming the stable organic–inorganic composite cathode electrolyte interphase (CEI) and the Li3N–LiF-rich solid electrolyte interphase (SEI).

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Pyrrolidinium‐PEG Ionic Copolyester: Li‐Ion Accelerator in Polymer Network Solid‐State Electrolytes

Cited by 42 publications

References 51 publications

Advanced Nonflammable Organic Electrolyte Promises Safer Li‐Metal Batteries: From Solvation Structure Perspectives

Advanced Nonflammable Organic Electrolyte Promises Safer Li‐Metal Batteries: From Solvation Structure Perspectives

Ultrahigh‐Rate Zn Stripping and Plating by Capacitive Charge Carriers Enrichment Boosting Zn‐Based Energy Storage

Organoboron- and Cyano-Grafted Solid Polymer Electrolytes Boost the Cyclability and Safety of High-Voltage Lithium Metal Batteries

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