Agglomeration-free composite solid electrolyte and enhanced cathode-electrolyte interphase kinetics for all-solid-state lithium metal batteries

Zhang, Zhouyu; Zhang, Shu; Geng, Shouxian; Zhou, Shoubin; Hu, Zhenglin; Luo, Jiayan

doi:10.1016/j.ensm.2022.06.025

Cited by 49 publications

(36 citation statements)

References 46 publications

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“…Meanwhile, new peaks associated with C−O (533.5 eV) and Si−O (532.6 eV) originating from the grafted KH570 are observed, further confirming the hydrolysis reaction between KH570 and LFP. 38,39 Furthermore, the ratio of the peak density of Si−O progressively increases with increasing reaction time, suggesting that surface chemistry altered from hydroxyl groups to targeted C�C groups in varying degrees, leading to gradient distribution of functional groups on the surface of the cathode. LFP-HCCD) (Figure S1).…”

Section: Construction Of Functionalized Lfp With Differentmentioning

confidence: 99%

Tuning the Covalent Coupling Degree between the Cathode and Electrolyte for Optimized Interfacial Resistance in Solid-State Lithium Batteries

Xie

Zhang

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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The development of promising solid-state lithium batteries has been a challenging task mainly due to the poor interfacial contact and high interfacial resistance at the electrode/ solid-state electrolyte (SSE) interface. Herein, we propose a strategy for introducing a class of covalent interactions with varying covalent coupling degrees at the cathode/SSE interface. This method significantly reduces interfacial impedances by strengthening the interactions between the cathode and SSE. By adjusting the covalent coupling degree from low to high, an optimal interfacial impedance of 33 Ω cm −2 was achieved, which is even lower than the interfacial impedance using liquid electrolytes (39 Ω cm −2 ). This work offers a fresh perspective on solving the interfacial contact problem in solid-state lithium batteries.

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Section: Construction Of Functionalized Lfp With Differentmentioning

confidence: 99%

Tuning the Covalent Coupling Degree between the Cathode and Electrolyte for Optimized Interfacial Resistance in Solid-State Lithium Batteries

Xie

Zhang

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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“…It includes the amorphous phase (‐HFP) which can offer better Li + conductivity and the crystalline phase (‐VDF) which can provide additional mechanical support. Meanwhile, its strong electron‐withdrawing C−F group on PVDF‐co‐HFP could tether the dissociated anion to decrease the space‐charge effect, which facilitates the Li + transport and inhibits the Li dendrite growth [23,30] …”

Section: The Chemical Fundamental Of the Gel Electrolytementioning

confidence: 99%

“…Meanwhile, its strong electron-withdrawing CÀ F group on PVDF-co-HFP could tether the dissociated anion to decrease the space-charge effect, which facilitates the Li + transport and inhibits the Li dendrite growth. [23,30] Plasticizer, usually referring to organic solvents, fills in the pores of the polymer skeleton to swell the polymer and improve the ionic conductivity and interfacial compatibility between the gel electrolyte and electrode. [31] It is reported that the plasticizer is beneficial to promote the transport of Li + because the plasticizer tends to weaken the intermolecular forces between polymer molecules and thus the activity and mobility of polymer molecular chain increase.…”

Section: The Chemical Fundamental Of the Gel Electrolyte 21 The Compo...mentioning

confidence: 99%

Gel Electrolyte for Li Metal Battery

Zeng

2022

Chemistry An Asian Journal

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The pursuit of high energy density enables lithium metal batteries (LMBs) to become the research hotpot again. However, the safety concerns including easy leakage and inflammability of the liquid electrolyte and the performance deterioration due to the uncontrollable Li dendrites growth in liquid electrolyte limit the further development of LMBs. Gel electrolyte, the most promising alternative for the commercial liquid electrolyte, is expected to solve the dilemma faced by the liquid electrolyte because of its higher safety, good flexibility and adaptability to the electrode and high ionic conductivity comparable to that of liquid electro-lyte. Deeply understanding the characteristics and the role of the gel electrolyte in LMBs is of great importance to achieve superior electrochemical performance of LMBs. In this review, we comprehensively introduce the chemical fundamental of the gel electrolyte. On this basis, the modification strategies and the recent progress of the gel electrolyte for LMBs are systematically reviewed and particularly highlighted, which are categorized based on composition regulation, structural design and functional design. We endeavor to provide guidance for the rational design of the gel electrolyte with superior properties for LMBs.

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“…Lithium metal batteries (LMBs) are considered to be the most promising rechargeable energy storage devices due to the low reduction potential and high energy density of the Li metal anode. − However, some serious issues, such as liquid electrolyte leakage or short circuiting caused by lithium dendrite penetration, impede the wide application of LMBs. Therefore, all-solid-state lithium batteries (ASSLBs) with solid electrolytes are being gradually developed to address these issues. − Inorganic solid-state electrolytes are widely appreciated for their high ionic conductivity and wide electrochemical window, but they suffer from unfavorable interfacial contact with electrodes . Polymer electrolytes with excellent flexibility can ensure compatibility between the electrode and electrolyte interface.…”

Section: Introductionmentioning

confidence: 99%

Chloride-Reinforced Solid Polymer Electrolyte for High-Performance Lithium Metal Batteries

Zhang

Sun

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible solid-state polymer electrolytes (SPEs) enable intimate contact with the electrode and reduce the interfacial impedance for all-solid-state lithium batteries (ASSLBs). However, the low ionic conductivity and poor mechanical strength restrict the development of SPEs. In this work, the chloride superionic conductor Li2ZrCl6 (LZC) is innovatively introduced into the poly(ethylene oxide) (PEO)-based SPE to address these issues since LZC is crucial for improving the ionic conductivity and enhancing the mechanical strength. The as-prepared electrolyte provides a high ionic conductivity of 5.98 × 10–4 S cm–1 at 60 °C and a high Li-ion transference number of 0.44. More importantly, the interaction between LZC and PEO is investigated using FT-IR and Raman spectroscopy, which is conducive to inhibiting the decomposition of PEO and beneficial to the uniform deposition of Li ions. Therefore, a minor polarization voltage of 30 mV is exhibited for the Li||Li cell after cycling for 1000 h. The LiFePO4||Li ASSLB with 1% LZC-added composite electrolyte (CPE-1% LZC) demonstrates excellent cycling performance with a capacity of 145.4 mA h g–1 after 400 cycles at 0.5 C. This work combines the advantages of chloride and polymer electrolytes, exhibiting great potential in the next generation of all-solid-state lithium metal batteries.

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Agglomeration-free composite solid electrolyte and enhanced cathode-electrolyte interphase kinetics for all-solid-state lithium metal batteries

Cited by 49 publications

References 46 publications

Tuning the Covalent Coupling Degree between the Cathode and Electrolyte for Optimized Interfacial Resistance in Solid-State Lithium Batteries

Tuning the Covalent Coupling Degree between the Cathode and Electrolyte for Optimized Interfacial Resistance in Solid-State Lithium Batteries

Gel Electrolyte for Li Metal Battery

Chloride-Reinforced Solid Polymer Electrolyte for High-Performance Lithium Metal Batteries

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