Slurry-like hybrid electrolyte with high lithium-ion transference number for dendrite-free lithium metal anode

Xu, Hai‐Bing; He, Yiyong; Zhang, Zibo; Shi, Junli; Liu, Pingying; Tian, Ziqi; Luo, Kan; Zhang, Xiaozhe; Liang, Suzhe; Liu, Zhaoping

doi:10.1016/j.jechem.2020.02.009

Cited by 26 publications

(17 citation statements)

References 58 publications

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“…The three peaks at 531.3, 532, and 533.4 eV in O 1s spectra (Figure S16a-c, Supporting Information) are assigned to CaO/CO 3 2 − /PO 4 3 − , CO, and CO, respectively. [33,41] The Ca 2p spectra in Figure S16d-f (Supporting Information) prove that the added CaCO 3 is involved in the SEI forming. Interestingly, Ca PO (347 ) can be detected after 50 cycles, [43,44] while only CaF 2 (347.8 eV) exists after 100 and 150 cycles.…”

Section: Mechanism Of Additive To Realize Highly Reversible LI Deposi...mentioning

confidence: 91%

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: Mechanism Of Additive To Realize Highly Reversible LI Deposi...mentioning

confidence: 91%

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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“…21,22 High lithium ion transference number is also useful for interfacial stability, improving the possibility of dendrite-free lithium ion deposition and dissolution processes. 23,24 In this regard, designing composite electrolytes with high selective fast Li + transport and stable interface is of importance, showing a significant influence on the performance of solid batteries. 25 Carbon dots with ultrasmall size (<10 nm) behave good dispersibility in the composite electrolyte compared with the other fillers with larger size.…”

Section: Introductionmentioning

confidence: 99%

“…Construction of a LiF‐enriched interface was proposed to achieve stable all‐solid‐state batteries 21,22 . High lithium ion transference number is also useful for interfacial stability, improving the possibility of dendrite‐free lithium ion deposition and dissolution processes 23,24 . In this regard, designing composite electrolytes with high selective fast Li + transport and stable interface is of importance, showing a significant influence on the performance of solid batteries 25 .…”

Section: Introductionmentioning

confidence: 99%

Carbon dots for ultrastable solid‐state batteries

Zhu

et al. 2022

SmartMat

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Among the solid electrolytes for solid-state Li batteries, polymer electrolytes are actively explored on the basis of the good interfacial contact and easy making, while it is still constrained by slow ionic transport and low lithium ion transference number. Herein, functional carbon dots-based Li + conductor (CD-Li) is designed to improve the dynamics and selectivity of Li + transport in polyethylene oxide (PEO) electrolyte. High ionic conductivity (1.0 × 10 −4 S/cm, 25 °C) and Li + transference number (0.60) were successfully achieved within the CD-Li-based PEO composite electrolyte, which could be attributed to the enhanced chain movement and the limited motion of anion. Moreover, the characteristics of big volume of individual anions of CD-Li can provide more free Li + . As well, benefiting from the existence of F atom in the CD-Li, in-situ constructed LiF-containing interfacial layer is in favor of maintaining the interface stability and facilitating the rapid transmission of Li ions. The composite electrolyte with CD-Li can address the ionic conductivity issues accompanied with strengthening the interfacial stability. The distinctive composite electrolyte realizes the stable cycle performance for Li/LiFePO 4 and Li/LiNi 0.5 Co 0.2 Mn 0.3 O 2 batteries. The exploration of multifunctional carbon dot fillers provides new ideas for the efficient development of composite electrolytes.

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“…A number of solutions have been developed to improve the cycle stability of lithium metal anode. Adopting electrolyte additives [12][13][14][15][16] or protective thin films [17][18][19][20][21] have shown promising results in suppressing Li dendrites by forming a solid electrolyte interface (SEI) layer with improved mechanical and electrochemical stability. However, the infinite volume changes of ''host-less" lithium metal during charge-discharge could break the hardly stabilized interface, promoting dendrite growth and, thus, premature cell failure [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Alternating nanolayers as lithiophilic scaffolds for Li-metal anode

Jiang

Liao

Liu

et al. 2021

Journal of Energy Chemistry

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Slurry-like hybrid electrolyte with high lithium-ion transference number for dendrite-free lithium metal anode

Cited by 26 publications

References 58 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

Carbon dots for ultrastable solid‐state batteries

Alternating nanolayers as lithiophilic scaffolds for Li-metal anode

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Slurry-like hybrid electrolyte with high lithium-ion transference number for dendrite-free lithium metal anode

Cited by 26 publications

References 58 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

Carbon dots for ultrastable solid‐state batteries

Alternating nanolayers as lithiophilic scaffolds for Li-metal anode

Contact Info

Product

Resources

About

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