Suppression of Lithium Dendrite Formation by Using LAGP-PEO (LiTFSI) Composite Solid Electrolyte and Lithium Metal Anode Modified by PEO (LiTFSI) in All-Solid-State Lithium Batteries

Wang, Chunhua; Yang, Yuxin; Liu, Xingjiang; Zhong, Hai; Han, Xu; Xu, Zhibin; Shao, Huixia; Ding, Fei

doi:10.1021/acsami.7b00336

Cited by 336 publications

(216 citation statements)

References 40 publications

Supporting

Mentioning

209

Contrasting

Unclassified

Order By: Relevance

“…Benefiting from the solid electrolyte that physically separates the liquid electrolytes, we used the gel sulfur electrode as a cathode, Li-metal as an anode, LAGP as a solid electrolyte, and 3 m LiCF 3 SO 3 liquid electrolyte containing Li 2 S 6 and LiNO 3 as an anolyte (Figure 3a). [12] The assembled hybrid cell possesses a low total resistance of 512 Ω cm 2 ( Figure S5, Supporting Information). A thin layer of glass fiber was inserted between the Li metal and LAGP to hold the anolyte and avoid the reduction of LAGP by Li metal.…”

Section: Resultsmentioning

confidence: 99%

Hybrid Lithium‐Sulfur Batteries with an Advanced Gel Cathode and Stabilized Lithium‐Metal Anode

Wang

Manthiram

2018

Advanced Energy Materials

View full text Add to dashboard Cite

The insulating nature of sulfur, polysulfide shuttle effect, and lithium‐metal deterioration cause a decrease in practical energy density and fast capacity fade in lithium‐sulfur (Li‐S) batteries. This study presents an integrated strategy for the development of hybrid Li‐S batteries based on a gel sulfur cathode, a solid electrolyte, and a protective anolyte composed of a highly concentrated salt electrolyte containing mixed additives. The dense solid electrolyte completely blocks polysulfide diffusion, and also makes it possible to investigate the cathode and anode independently. This gel cathode effectively traps the polysulfide active material while maintaining a low electrolyte to sulfur ratio of 5.2 mL g−1. The anolyte effectively protects the Li metal and suppresses the consumption of liquid electrolyte, enabling stable long‐term cycling for over 700 h in Li symmetric cells. This advanced design can simultaneously suppress the polysulfide shuttle, protect Li metal, and reduce the liquid electrolyte usage. The assembled hybrid batteries exhibit remarkably stable cycling performance over 300 cycles with high capacity. Finally, surface‐sensitive techniques are carried out to directly visualize and probe the interphase formed on the surface of the Li1.5Al0.5Ge1.5(PO4)3 (LAGP) pellet, which may help stabilize the solid–liquid interface.

show abstract

Section: Resultsmentioning

confidence: 99%

Hybrid Lithium‐Sulfur Batteries with an Advanced Gel Cathode and Stabilized Lithium‐Metal Anode

Wang

Manthiram

2018

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…PEO is also applied as buffer electrolyte in term of polymer electrolyte due to its stability to Li metal regardless of low ionic conductivity. The stability and ionic conductivity of polymer electrolyte are highly depended on the molecule weight of PEO and the ratio of PEO in polymer electrolyte . Cross‐linked hydrocarbon/PEO electrolyte exhibits both high ionic conductivity and strong lithium dendrite resistance.…”

Section: | Solid Electrolytementioning

confidence: 99%

Advances in Interfaces between Li Metal Anode and Electrolyte

Zhang

Cheng

Zhang

2017

Adv Materials Inter

214

140

View full text Add to dashboard Cite

on Li metal anode paired with sulfur/ oxygen cathode is highly concerned. [6] Li metal has extremely high theoretical specific capacity (3860 mA h g −1 ), nearly ten times higher than that of graphite anode, and the lowest reduction potential (−3.040 V vs. standard hydrogen electrode), which has been considered as a 'Holy Grail' anode in rechargeable batteries. [7] Moreover, Li metal anode can be paired with different cathode materials, such as intercalated cathodes (e.g., LiFePO 4 , [8] LiNi x Co y Mn 1−x−y O 2 [9,10] ) and conversion cathodes (e.g., S, [11,12] O 2 [13] ), to construct different types of high energy density batteries. The specific energy densities of Li metal batteries are very hopeful to approach 500 Wh kg −1 in the next 5 to 10 years according to the goal of US Department of Energy.Nevertheless, the rechargeable Li metal batteries have not been large-scale released yet. Li metal anode was first applied in Li-TiS 2 rechargeable batteries. In 1980s, the first-generation rechargeable Li metal batteries were commercialized by MOLI energy. [14] However, there were incessant reports about the fires and explosion events of rechargeable Li metal batteries. Safety issue has been the grand challenge hindering the practical applications of Li metal batteries since then. The main origin of safety issue comes from Li dendrites, i.e., random and spiculate Li deposition, which is induced by unstable interfaces between Li metal and liquid electrolyte. [2,15] Due to its extreme reactivity, Li metal can react with nearly all electrolytes, inducing the spontaneous decomposition of organic electrolyte. [16] The reaction products between Li and electrolyte constitute the solid electrolyte interphase (SEI) on Li metal anode, which was first named by Peled in 1979. [17] However, the formed SEI is fragile and heterogeneous with varied spatial resistance, [18,19] which induces uneven Li ions flux and random Li deposition underneath. Consequently, the surface of Li metal in a working cell is not uniform, where there are many protuberances enhancing the local electric field and attracting Li ions to deposit. [20] When the Li ion concentration near anode surface decreases to zero at the characteristic time (named as Sand's time), [21] scarce Li ions aggravate the nonuniformity of Li deposition and accelerate the growth of Li dendrites, which is a self-amplifying process. [22] The dendritic Li can easily pierce fragile SEI and induce the rapid decomposition of liquid electrolyte to form new SEI. [19,23] In the subsequent stripping process, gracile Li dendrites may break from the roots forming dead Li. [24] The repeated formation of SEI and dead Li give rise to low Coulombic efficiency. [15] Additionally, interfacial resistance Lithium metal has been considered as one of the most promising anode materials in high-energy-density rechargeable batteries due to its extremely high specific capacity and very low reduction potential of all possible candidates. However, the mysterious interfacial phenomena of lithium metal ano...

show abstract

“…However, it is smelly, expensive, unstable under air and reactive with water generating harmful H2S. A battery system composed of lithium aluminum germanium phosphate (LAGP, Li1.5Al0.5Ge1.5(PO4) 3,) and PEO has been tried with protecting layers 32 . The drawback of this system is a specific interaction of LAGP with Li metal and working at 50 °C but not at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…But LATP exhibits lower ion conductivity than that of liquid electrolyte or sulfide-based electrolytes, reduction of Ti into Ti 3+ by the interaction of Li ion, and high grain boundary resistance 33 . To overcome these problems, protecting layer of thin layers composed of PEO 34 or Al2O3 35 has been introduced to minimize the interaction with Li ion. LATP pellet was dip-coated in PEO for a protecting layer formation between the LATP and Li metal surface.…”

Section: Introductionmentioning

confidence: 99%

A New All-Solid-State Lithium-Ion Battery Working without a Separator in an Electrolyte<strong> </strong>

Cho¹,

Kim²,

Kim³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

Suppression of Lithium Dendrite Formation by Using LAGP-PEO (LiTFSI) Composite Solid Electrolyte and Lithium Metal Anode Modified by PEO (LiTFSI) in All-Solid-State Lithium Batteries

Cited by 336 publications

References 40 publications

Hybrid Lithium‐Sulfur Batteries with an Advanced Gel Cathode and Stabilized Lithium‐Metal Anode

Hybrid Lithium‐Sulfur Batteries with an Advanced Gel Cathode and Stabilized Lithium‐Metal Anode

Advances in Interfaces between Li Metal Anode and Electrolyte

A New All-Solid-State Lithium-Ion Battery Working without a Separator in an Electrolyte<strong> </strong>

Contact Info

Product

Resources

About