Li 2 S 5 -based ternary-salt electrolyte for robust lithium metal anode

Zhao, Chen‐Zi; Cheng, Xin‐Bing; Zhang, Rui; Peng, Hong‐Jie; Huang, Jia‐Qi; Ran, Rui; Huang, Zheng‐Hong; Wei, Fei; Zhang, Qiang

doi:10.1016/j.ensm.2016.01.007

Cited by 240 publications

(158 citation statements)

References 56 publications

Supporting

Mentioning

149

Contrasting

Unclassified

Order By: Relevance

“…66 By the meticulous investigations into the role of LiPSs on the composition of SEI film, it is found that Li 2 S/Li 2 S 2 is the unique component, which has not been found in the SEI films induced by other sulfur-containing additives, while Li 2 S x O y can also be achieved by other sulfur-containing electrolyte. 45,46,65 Notably, the sulfurized SEI film indicates a high Li ion conductivity. However, Li 2 S itself is a poor ionic conductor.…”

Section: The Sei On LI Metal Anode In Li−s Batteriesmentioning

confidence: 99%

“…Though LiPSs can synergize with LiNO 3 to construct a unique SEI film, it does not mean that all LiPS species can act well for Li metal anode protection. 45 When different LiPSs (Li 2 good cycling performance when co-operating with 5.0 wt% LiNO 3 in the LiTFSI (1.0 M)−DOL/DME electrolyte. 46 As the LiPSs in the electrolyte solution are not in a stoichiometric equilibrium and the exact compositions are highly depended on the concentrations of LiPS species.…”

Section: The Sei On LI Metal Anode In Li−s Batteriesmentioning

confidence: 99%

“…Surprisingly, researchers recently found that some specific kinds of LiPSs (such as Li 2 S 5 and Li 2 S 8 ) at a certain concentration can heal the dead Li 2 S and Li 2 S 2 , 43,44 facilitating the formation of a stable SEI when synergizing with LiNO 3 additives. 45,46 Consequently, it is of primary importance to clearly investigate the surface chemistry of Li metal anode with the existence of LiPS species.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Review—Li Metal Anode in Working Lithium-Sulfur Batteries

Cheng

Huang

Zhang

2017

J. Electrochem. Soc.

Self Cite

243

170

View full text Add to dashboard Cite

Due to the high theoretical energy density of 2600 Wh kg −1 , lithium-sulfur batteries are strongly regarded as the promising nextgeneration energy storage devices. However, the practical applications of lithium-sulfur batteries are challenged by several obstacles, including the low sulfur utilization and poor lifespan, which are partly attributed to the shuttle of lithium polysulfides and lithium dendrite growth in working lithium-sulfur batteries. Suppressing lithium dendrite growth is a necessary step not only for a safe and efficient Li metal anode, but also for a high capacity cell with a high Coulombic efficiency. Herein we review the lithium metal anode protection in a polysulfide-rich environment, relative to most reviews on lithium metal anode without considering the effect of lithium polysulfides in lithium metal batteries. Firstly, the importance and dilemma of Li metal anode issues in lithium-sulfur batteries are underscored, aiming to arouse the attentions to Li metal anode protection. Specific attentions are paid to the surface chemistry of Li metal anode in a polysulfide-rich lithium-sulfur battery. Next, the proposed strategies to stabilize solid electrolyte interface and protect Li metal anode are included. Finally, a general conclusion and a perspective on the current limitations, as well as recommended future research directions of Li metal anode in lithium-sulfur batteries are presented. The ever-increasing requirement for efficient and economic energy storage technologies has triggered the continued research into advanced battery systems.1 Lithium ion batteries, based on the lithium intercalation chemistry, have dominated the battery market since their commercial application in the 1990s.2 However, conventional lithium ion batteries are very expensive and their energy densities (theoretically, 350 − 500 Wh kg −1 , practically, 100 − 250 Wh kg −1 ) seem insufficient for long-range electrical vehicles and high-end portable electronics. These emerging demands have energized the evolution of other alternative rechargeable batteries with higher energy density and longer lifespan.3 Lithium−sulfur (Li−S) battery, a 'beyond Li-ion' technology, has drawn extensive attentions due to its high specific capacity (1675 mAh g −1 ) and energy density (2600 Wh kg −1 ). 4-6The greater energy storage ability of Li−S batteries is realized through the phase-transformation electrochemistry based on elemental sulfur cathode and metallic lithium anode [S 8 + 16Li ↔ 8Li 2 S], 7,8 which is fundamentally different from current transition metal-based cathodes and graphite-based anodes in Li-ion batteries.The conversion chemistry in a Li−S cell offers not only significant advantages as mentioned above, but also some critical challenges, such as the low conductivity of sulfur and lithium sulfide, the huge volumetric change from sulfur (71 mol L −1 ) to lithium sulfide (36 mol L −1 ), and the shuttle of long-chain polysulfide intermediates during discharge/charge cycling.9-12 Therefore, a composite cathode with sulfur in ...

show abstract

Section: The Sei On LI Metal Anode In Li−s Batteriesmentioning

confidence: 99%

Section: The Sei On LI Metal Anode In Li−s Batteriesmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Review—Li Metal Anode in Working Lithium-Sulfur Batteries

Cheng

Huang

Zhang

2017

J. Electrochem. Soc.

Self Cite

243

170

View full text Add to dashboard Cite

show abstract

“…With the indepth studies, it has been found that the synergetic effect of Li 2 S x , LiTFSI, and LiNO 3 ternary salt in the electrolyte effectively constructs a stable and compact solid electrolyte interphase (SEI) layer to protect Li. Considering XAS, XPS, SEM, and other advanced characterizations, LiTFSI is proposed to afford a high Li + conductivity of the electrolyte in a working battery and the reactions between LiNO 3 and Li 2 S x induce Li 2 SO 3 formation, which is favorable to build protective SEI layer [315][316][317][318]. Afterward, some new electrolyte additives such as CsNO 3 , LaNO 3 with similar roles but better electrochemical performances were also proposed [197,319].…”

Section: In Situ Surface Coatingmentioning

confidence: 99%

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

Yang

Adair

et al. 2018

Electrochem. Energ. Rev.

327

206

View full text Add to dashboard Cite

Lithium-sulfur (Li-S) batteries have been considered as one of the most promising energy storage devices that have the potential to deliver energy densities that supersede that of state-of-the-art lithium ion batteries. Due to their high theoretical energy density and cost-effectiveness, Li-S batteries have received great attention and have made great progress in the last few years. However, the insurmountable gap between fundamental research and practical application is still a major stumbling block that has hindered the commercialization of Li-S batteries. This review provides insight from an engineering point of view to discuss the reasonable structural design and parameters for the application of Li-S batteries. Firstly, a systematic analysis of various parameters (sulfur loading, electrolyte/sulfur (E/S) ratio, discharge capacity, discharge voltage, Li excess percentage, sulfur content, etc.) that influence the gravimetric energy density, volumetric energy density and cost is investigated. Through comparing and analyzing the statistical information collected from recent Li-S publications to find the shortcomings of Li-S technology, we supply potential strategies aimed at addressing the major issues that are still needed to be overcome. Finally, potential future directions and prospects in the engineering of Li-S batteries are discussed.

show abstract

“…Tremendous efforts have been made to solve these problems. Various types of electrolyte additives, such as Cs + [13], FEC [14], polysulfide [15][16], LiNO 3 [17][18], ionic liquid electrolytes [19] and H 2 O [20] have been used to form a stable and passivate layer on the Li metal anode. With adequately high shear modules to prevent the penetration of Li dendrites, solid electrolytes and gel polymer electrolytes have also been proposed to replace liquid electrolyte [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A lightweight carbon nanofiber-based 3D structured matrix with high nitrogen-doping level for lithium metal anodes

Zhang

Deng

et al. 2018

Sci. China Mater.

View full text Add to dashboard Cite

Lithium metal is considered to be the most promising anode material for the next-generation rechargeable batteries. However, the uniform and dendrite-free deposition of Li metal anode is hard to achieve, hindering its practical applications. Herein, a lightweight, free-standing and nitrogen-doped carbon nanofiber-based 3D structured conductive matrix (NCNF), which is characterized by a robust and interconnected 3D network with high doping level of 9.5 at%, is prepared by electrospinning as the current collector for Li metal anode. Uniform Li nucleation with reduced polarization and dendrite-free Li deposition are achieved because the NCNF with high nitrogen-doping level and high conductivity provide abundant and homogenous metallic Li nucleation and deposition sites. Excellent cycling stability with high coulombic efficiency are realized. The Li plated NCNF was paired with LiFePO 4 to assemble the full battery, also showing high cyclic stability.

show abstract

Li 2 S 5 -based ternary-salt electrolyte for robust lithium metal anode

Cited by 240 publications

References 56 publications

Review—Li Metal Anode in Working Lithium-Sulfur Batteries

Review—Li Metal Anode in Working Lithium-Sulfur Batteries

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

A lightweight carbon nanofiber-based 3D structured matrix with high nitrogen-doping level for lithium metal anodes

Contact Info

Product

Resources

About