Suppression of dendritic lithium formation by using concentrated electrolyte solutions

Jeong, Soon-Ki; Seo, Hee-Young; Kim, Dong-Hak; Han, Hyun-Kak; Kim, Jin-Gul; Lee, Yoon Bae; Iriyama, Yasutoshi; Abe, Takeshi; Ogumi, Zempachi

doi:10.1016/j.elecom.2008.02.006

Cited by 196 publications

(96 citation statements)

References 18 publications

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“…On recent studies, the concentrated electrolyte with few free solvent molecules can facilitate the formation of an anionderived SEI layer and suppress the reduction of free solvent molecules, which enhances the robustness of SEI layer. [9][10][11] Therefore, the concentrated electrolyte can suppress the Al corrosion, dendritic lithium formation, and co-intercalation of solvent molecules (PC and DMSO etc.) with Li + into graphite sheets, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dual‐Salt Concentrated Electrolytes on the Electrochemical Performance of Silicon Nanoparticles

Chang

Yun

et al. 2020

ChemElectroChem

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As a promising anode material, silicon has attracted extensive attention. The instability of the electrode/electrolyte interphase due to the inherent volume variation upon (de)lithiation is one of the major factors limiting the commercialization of silicon anode materials. Here, we report a concentrated electrolyte with lithium bis(fluorosulfonyl)imide (LiFSI) and lithium difluoro (oxalate) borate (LiDFOB) dual salt to enhance the control of the species constituting the solid electrolyte interphase (SEI) on the surface of the silicon material. The silicon nanoparticle (SiNP) electrode with the dual‐salt LiFSI0.7LiDFOB0.3‐(PC)4 concentrated electrolyte delivers a relatively high average coulombic efficiency of 97.68 % and a remarkably improved cycling performance with an initial capacity of approximately 3300 mAh g−1 and a capacity retention around 2000 mAh g−1 after 100 cycles. It is found that the polarity of the B−F bond of LiDFOB decreases when the molar ratio of LiDFOB to LiFSI is greater than 0.3 : 0.7. Therefore, the reduction of LiDFOB through a ring‐opening reaction coupled with a ring‐opening reaction of PC becomes dominant. The SEI layer rich in the corresponding products Li(BF2O)n polymer could suppress the rupture of the Si particles and excessive growth of the SEI layer, thus could further mitigate the decrease of coulombic efficiency.

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Section: Introductionmentioning

confidence: 99%

Effect of Dual‐Salt Concentrated Electrolytes on the Electrochemical Performance of Silicon Nanoparticles

Chang

Yun

et al. 2020

ChemElectroChem

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“…This large change in the volume of the Li electrode can cause two serious problems: (1) continuous decomposition of the electrolyte owing to contact with the fresh Li surface through cracks in the solid–electrolyte interphase (SEI)7; (2) acceleration of dendritic growth because of the presence of spatially inhomogeneous SEIs and non-uniform morphology of the Li surface8910111213141516. These two factors can seriously affect the performance, cycle life, and safety of lithium batteries.…”

mentioning

confidence: 99%

“…Hence, the prevention of electrolyte decomposition and the suppression of dendritic growth are necessary if Li anodes are to be employed in batteries. It had been previously suggested that the surface morphologies of lithium anodes could be controlled through the use of various electrolytes such as carbonates, esters, ethers, and ionic liquids, or mixtures of such electrolytes891011121314151617. Furthermore, exploiting the pressure effect18, using thin films of lithium19, and applying block copolymer electrolytes20 have also been suggested as ways of enabling efficient cycling at low areal capacities.…”

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confidence: 99%

A Highly Reversible Lithium Metal Anode

Park

Bok

Lee

et al. 2014

Sci Rep

293

174

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Lithium metal has shown a lot of promise for use as an anode material in rechargeable batteries owing to its high theoretical capacity. However, it does not meet the cycle life and safety requirements of rechargeable batteries owing to electrolyte decomposition and dendrite formation on the surfaces of the lithium anodes during electrochemical cycling. Here, we propose a novel electrolyte system that is relatively stable against lithium metal and mitigates dendritic growth. Systematic design methods that combined simulations, model-based experiments, and in situ analyses were employed to design the system. The reduction potential of the solvent, the size of the salt anions, and the viscosity of the electrolyte were found to be critical parameters determining the rate of dendritic growth. A lithium metal anode in contact with the designed electrolyte exhibited remarkable cyclability (more than 100 cycles) at a high areal capacity of 12 mAh cm−2.

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“…But, it is noticeablethat the long-term cycling stabilities and high CEs of Li j Cu cellsi nt he above-mentioned concentrated electrolytes are better than those in other salt electrolytes. [33,34] Figure 3c displays the cycling performance for the Li j Cu cells with the 2 m LiFSI + 2 m LiFTFSI electrolyte at variousc urrent densities. Ah igh average CE of > 95 %a nd excellent cycling performance of > 250 cycles for the Li j Cu cells are achieved, even at ah igh current density of 3mAcm À2 (Figure S7).…”

mentioning

confidence: 99%

Improved Cycling Stability of Lithium‐Metal Anode with Concentrated Electrolytes Based on Lithium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide

Fang

et al. 2016

ChemElectroChem

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A new type of concentrated electrolyte composed of Li[(FSO2)N(SO2CF3)] (LiFTFSI), Li[N(SO2F)2] (LiFSI), and ether solvents can improve the cycling stability of lithium (Li) metal and inhibit Li‐metal dendritic growth. The high average coulombic efficiency of >95 % and excellent cycling performance of >250 cycles for the Li|copper cells have been achieved, even at a high current density of 3 mA cm−2. Moreover, the Li|LiFePO4 cell exhibits superior cycling stability with capacity retention of >92 % at 0.2 C for more than 200 cycles and excellent C‐rate capability.

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Suppression of dendritic lithium formation by using concentrated electrolyte solutions

Cited by 196 publications

References 18 publications

Effect of Dual‐Salt Concentrated Electrolytes on the Electrochemical Performance of Silicon Nanoparticles

Effect of Dual‐Salt Concentrated Electrolytes on the Electrochemical Performance of Silicon Nanoparticles

A Highly Reversible Lithium Metal Anode

Improved Cycling Stability of Lithium‐Metal Anode with Concentrated Electrolytes Based on Lithium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide

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