Large-area surface-patterned Li metal anodes fabricated using large, flexible patterning stamps for Li metal secondary batteries

Bae, Hyeon-Su; Phiri, Isheunesu; Kang, Hyeonbae; Lee, Yong Min; Ryou, Myung‐Hyun

doi:10.1016/j.jpowsour.2021.230553

Cited by 11 publications

(4 citation statements)

References 36 publications

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“…[1][2][3] Lithium-metal battery (LMB), with its unparalleled specific capacity (3860 mA h g −1 ) and the extremely low reduction potential (−3.04 V vs standard hydrogen electrode) of lithium (Li) metal anode, is regarded as a promising candidate for the next generation ultra-high energy density (>300 W h kg −1 ) rechargeable battery. [4][5][6] Unfortunately, hindered by its high reactivity and large volume variation during realizing a greatly prolonged effective duration of the additive. Density functional theory (DFT) calculations confirm that the reduction potential of Ca 2+ in EC/DEC is lower than that of Li + , which means that partially generated Ca 2+ will adhere to the protuberances of Li metal without being reduced and repulse Li + from depositing at the tips to form dendrites.…”

Section: Introductionmentioning

confidence: 99%

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO₃

Peng

Liu

Jiang

et al. 2022

Advanced Energy Materials

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the cycling of the Li metal anode, it is difficult for the conventional electrolyte to form stable and homogeneous solid electrolyte interphase (SEI) layer on the electrode to protect the interface, and the consequent incomplete SEI will further induce the growth of Li dendrites and finally cause cell failure. [7,8] Poor recyclability and serious safety problems have greatly hindered the commercialization of LMBs.So far, tremendous efforts have been invested to inhibit the growth of Li dendrites and boost the Coulombic efficiency (CE) of LMB, multiple methods such as constructing artificial SEI, [9] using 3D porous current collectors, [10] modifying separators, [11,12] optimizing electrolyte composition and forming Li-based alloys have been adopted. [13][14][15] From the perspective of commercialization potential, electrochemical performance, and environmental protection, adding the appropriate amount of additives to commercial carbonate electrolytes is undoubtedly the most advantageous way to optimize the performance of LMBs. [16] To date, additives like some sulfur-containing compounds, [17] inorganic salts, [18][19][20] and fluorine-containing materials [21,22] have been found with high Li-metal compatibility and proved effective in forming stable SEI layer. Nevertheless, most additives will preferentially participate in the interfacial reactions that cause their concentration to drop, leading to the gradual failure of the additives during cycling. [23] It should be noted that increasing the dosage of additives will not only raise the cost, but also accelerate the unfavored side reactions due to the increased concentration of unstable active groups (such as -F, -S(O) 2 -, etc.) and higher viscosity, leading to electrolyte deterioration and gas production (Figure 1a). [24,25] To conquer the above issues, several LiNO 3containing additives have been successfully developed recently inspired by the sustained-release strategy, and their impressive performances demonstrate the great application potential of this method. [26,27] Therefore, optimizing the overall performance and cost of additives designed based on this strategy is of great research significance.Herein, we adopt cheap, environment-friendly CaCO 3 nanoparticles (40-80 nm) as a novel solid additive for LMBs. The added nano CaCO 3 additive exhibits a unique sustainedrelease mechanism as is shown in Figure 1b, which can absorb the decomposition by-products of electrolyte continuously and release active substances containing LiPO 2 F 2 and Ca 2+ , thus

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Section: Introductionmentioning

confidence: 99%

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO₃

Peng

Liu

Jiang

et al. 2022

Advanced Energy Materials

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“…It is generally accepted that lowering the effective current density and Li nucleation overpotential through increasing the electroactive surface area of electrodes would be beneficial in preventing the formation of Li dendrites. − Therefore, it is crucial to design electrode architectures with a sizable electroactive surface area. Recently, extensive efforts have been dedicated to Li metal anode protection by developing three-dimensional (3D) hosts − and constructing structured Li anodes. ,− The reported composite Li-based 3D host and structured Li anodes, mainly prepared via melting or electroplating methods and mechanical surface modification, respectively, demonstrated a largely increased specific surface area and a decreased current density, making significant advancements in uniform Li deposition/dissolution and rate capability due to the improved Li + interfacial transport kinetics. For instance, a ZnO-coated 3D polymeric matrix achieved a stable composite Li anode and efficient dendrite suppression in carbonate electrolytes at a high current density of 5 mA cm –2 .…”

Section: Introductionmentioning

confidence: 99%

Engineering Array-Patterned Cathodes and Anodes for Synergistically Enabling High-Performance Lithium Metal Batteries

Wang

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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Critical challenges such as safety and cyclability concerns resulting from the uncontrollable dendritic lithium (Li) growth, especially during the fast charging/discharging process, have seriously hampered the commercialization of Li metal batteries (LMBs). Here, a novel array-patterned LiFePO4 (LFP) cathode prepared via a simple, scalable calendaring method is developed to enable highly stable Li metal anodes with patterned ditches and bulges during the cell assembling process. Both the structured electrodes provide a remarkably increased electroactive surface area to lower the current density locally, facilitating Li-ion transport kinetics and homogeneous Li plating/stripping. Due to the long-term internal pressure in the cell, the structured LFP and Li electrodes can maintain their original structure during sustained cycling. Such distinctive electrode architectures and cell design synergistically enable excellent rate capability with a discharge capacity of up to 128 mA h g–1 at a high current density of 9 mA cm–2 and impressive cycling stability, with 89.6% capacity retention after 300 cycles at 1.5 mA cm–2. Moreover, ultrasonic transmission mapping is carried out and demonstrates no gas behavior in operating modified Li||LFP pouch cells over prolonged cycling. This simple fabrication method can potentially be applied to many other active materials to enable practical LMBs with high performance.

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“…Until now, tremendous innovative strategies have been presented to overcome Si challenges for powder-based LIBs, such as powder nanosizing, 15 morphology control, 16,17 surface coating, 17,18 composite formulation, 19,20 doping, 21 functional binder composites, 22,23 and electrolyte optimization. 24,25 While it might be more daunting to tackle these issues for thin films limited by geometric constraints, 26,27 recently, multiscale micro-pattern design has emerged widely for thin film anode materials such as Li metal, 28,29 pure-Si, 30,31 composites, 32,33 and copper current collectors, 34 even expanding to cathodes 35 and entire cells, 36,37 to effectively facilitate stress evolution. It is well known that the eigen deformation of a free-standing material does not lead to mechanical stress, but only to self-compatible deformations, and eigen-strain-induced stresses are generated when the eigen strain is constrained.…”

Section: Introductionmentioning

confidence: 99%

Waterbed inspired stress relaxation strategies of patterned silicon anodes for fast-charging and longevity of lithium microbatteries

Chen,

Cheng,

Huang

et al. 2023

J. Mater. Chem. A

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Large-area surface-patterned Li metal anodes fabricated using large, flexible patterning stamps for Li metal secondary batteries

Cited by 11 publications

References 36 publications

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO₃

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO₃

Engineering Array-Patterned Cathodes and Anodes for Synergistically Enabling High-Performance Lithium Metal Batteries

Waterbed inspired stress relaxation strategies of patterned silicon anodes for fast-charging and longevity of lithium microbatteries

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Large-area surface-patterned Li metal anodes fabricated using large, flexible patterning stamps for Li metal secondary batteries

Cited by 11 publications

References 36 publications

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO3

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO3

Engineering Array-Patterned Cathodes and Anodes for Synergistically Enabling High-Performance Lithium Metal Batteries

Waterbed inspired stress relaxation strategies of patterned silicon anodes for fast-charging and longevity of lithium microbatteries

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Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO₃

Optimized Cycle and Safety Performance of Lithium–Metal Batteries with the Sustained‐Release Effect of Nano CaCO₃