The void formation behaviors in working solid-state Li metal batteries

Lu, Yang; Zhao, Chen‐Zi; Hu, Jie; Sun, Shuo; Yuan, Hong; Fu, Zhongheng; Chen, Xiang; Huang, Jia‐Qi; Ouyang, Minggao; Zhang, Qiang

doi:10.1126/sciadv.add0510

Cited by 63 publications

(44 citation statements)

References 53 publications

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“…Solid‐state lithium metal batteries (SSLMBs) are highly desirable for electrochemical energy storage because of the urgent need for higher energy density and safer battery application such as electric vehicles, portable devices, and energy storage power stations. [ 1–7 ] To achieve more competitive battery technology, excellent high‐power cycling, and low‐temperature operation performance are desired for SSLMBs. [ 8–10 ] The solid‐state electrolyte is one of the key components of SSLMBs, which acts as the ion transport pathway and is also critical to SSLMBs performance.…”

Section: Introductionmentioning

confidence: 99%

Polyether‐b‐Amide Based Solid Electrolytes with Well‐Adhered Interface and Fast Kinetics for Ultralow Temperature Solid‐State Lithium Metal Batteries

Huang

Wang

et al. 2023

Adv Funct Materials

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Solid-state lithium metal batteries (SSLMBs) are highly desirable for energy storage because of the urgent need for higher energy density and safer batteries. However, it remains a critical challenge for stable cycling of SSLMBs at low temperature. Here, a highly viscoelastic polyether-b-amide (PEO-b-PA) based composite solid-state electrolyte is proposed through a one-pot melt processing without solvent to address this key process. By adjusting the molar ratio of PEO-b-PA to lithium bis(trifluoromethanesulphonyl)imide (ethylene oxide:Li = 6:1) and adding 20 wt.% succinonitrile, fast Li + transport channel is conducted within the homogeneous polymer electrolyte, which enables its application at ultra-low temperature (−20 to 25 °C). The composite solid-state electrolyte utilizes dynamic hydrogen-bonding domains and ionconducting domains to achieve a low interfacial charge transfer resistance (<600 Ω) at −20 °C and high ionic conductivity (25 °C, 3.7 × 10 −4 S cm −1 ). As a result, the LiFePO 4 |Li battery based on composite electrolyte exhibits outstanding electrochemical performance with 81.5% capacity retention after 1200 cycles at −20 °C and high discharge specific capacities of 141.1 mAh g −1 with high loading (16.1 mg cm −2 ) at 25 °C. Moreover, the solid-state SNCM811|Li cell achieves excellent safety performance under nail penetration test, showing great promise for practical application.

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Section: Introductionmentioning

confidence: 99%

Polyether‐b‐Amide Based Solid Electrolytes with Well‐Adhered Interface and Fast Kinetics for Ultralow Temperature Solid‐State Lithium Metal Batteries

Huang

Wang

et al. 2023

Adv Funct Materials

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“…This research revealed how the interaction of void formation, interphase growth and volume change affect on the cell operating mechanism, notably, they found that the local interface roughness does not affect the tendency of void formation during the stripping process. Lu et al 97 investigated the interfacial Li void formation and evolution mechanism by comparing the Li void behaviors in solid‐state batteries to the bubble production processes in liquid phases, while the void was considered as bubbles and Li metal was treated as solution. Their research indicates that due to the intrinsic void diffusion, the voids formed at the interface will spread into the bulk of Li anode, while the diffusion coefficient can be considered as “floating rate” in the liquid phase.…”

Section: Interfacial Property Engineeringmentioning

confidence: 99%

Advances of sulfide‐type solid‐state batteries with negative electrodes: Progress and perspectives

Jeong

Sim

et al. 2023

EcoMat

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All-solid-state battery (ASSB) technology is the focus of considerable interest owing to their safety and the fact that their high energy density meets the requirements of emerging battery applications, such as electric vehicles and energy storage systems (ESSs). In light of this, current research on high-energy ASSBs harnesses the benefits of solid-state battery systems by employing anode materials with high energy densities. Owing to the excellent physical safety of solid electrolytes, it is possible to build a battery with high energy density by using high-energy negative electrode materials and decreasing the amount of electrolyte in the battery system. Sulfide-based ASSBs with high ionic conductivity and low physical contact resistance is recently receiving considerable attention. This review provides a summary on various anode materials for ASSBs operating under electrochemically reducing conditions from the perspective of electrochemical and physical safety. The electrochemical and physical properties of sulfide electrolytes used for lithium (Li) metal and particle-type anode materials are presented, as well as strategies for mitigating interfacial failures in solid-state cells through interlayer and electrode design.

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“…Experimentally, the formation of voids can be followed electrochemically due to the associated increase in interfacial resistance (constriction resistance) [33] . This constriction resistance can be minimized by controlling the mechanical properties of the alkali metal through optimization of external parameters such at temperature and pressure [33,112,114,115] …”

Section: The Theory Of Wettingmentioning

confidence: 99%

Understanding and Engineering Interfacial Adhesion in Solid‐State Batteries with Metallic Anodes

et al. 2023

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High performance alkali metal anode solid‐state batteries require solid/solid interfaces with fast ion transfer that are morphologically and chemically stable upon electrochemical cycling. Void formation at the alkali metal/solid‐state electrolyte interface during alkali metal stripping is responsible for constriction resistances and hotspots that can facilitate dendrite propagation and failure. Both externally applied pressures (35–400 MPa) and temperatures above the melting point of the alkali metal have been shown to improve the interfacial contact with the solid electrolyte, preventing the formation of voids. However, the extreme pressure and temperature conditions required can be difficult to meet for commercial solid‐state battery applications. In this review, we highlight the importance of interfacial adhesion or ‘wetting’ at alkali metal/solid electrolyte interfaces for achieving solid‐state batteries that can withstand high current densities without cell failure. The intrinsically poor adhesion at metal/ceramic interfaces poses fundamental limitations on many inorganics solid‐state electrolyte systems in the absence of applied pressure. Suppression of alkali metal voids can only be achieved for systems with high interfacial adhesion (i. e. ‘perfect wetting’) where the contact angle between the alkali metal and the solid‐state electrolyte surface goes to θ=0°. We identify key strategies to improve interfacial adhesion and suppress void formation including the adoption of interlayers, alloy anodes and 3D scaffolds. Computational modeling techniques have been invaluable for understanding the structure, stability and adhesion of solid‐state battery interfaces and we provide an overview of key techniques. Although focused on alkali metal solid‐state batteries, the fundamental understanding of interfacial adhesion discussed in this review has broader applications across the field of chemistry and material science from corrosion to biomaterials development.

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The void formation behaviors in working solid-state Li metal batteries

Cited by 63 publications

References 53 publications

Polyether‐b‐Amide Based Solid Electrolytes with Well‐Adhered Interface and Fast Kinetics for Ultralow Temperature Solid‐State Lithium Metal Batteries

Polyether‐b‐Amide Based Solid Electrolytes with Well‐Adhered Interface and Fast Kinetics for Ultralow Temperature Solid‐State Lithium Metal Batteries

Advances of sulfide‐type solid‐state batteries with negative electrodes: Progress and perspectives

Understanding and Engineering Interfacial Adhesion in Solid‐State Batteries with Metallic Anodes

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