Regulating the Solvation Structure of Nonflammable Electrolyte for Dendrite-Free Li-Metal Batteries

Zhang, Ting; Li, Yuejiao; Chen, Nan; Wen, Ziyue; Shang, Yanxin; Zhao, Yuanyuan; Yan, Mingxia; Guan, Minrong; Wu, Feng; Chen, Renjie

doi:10.1021/acsami.0c19075

Cited by 23 publications

(18 citation statements)

References 42 publications

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“…Figure S2 shows the LSV of the LiPF 6 -based electrolyte, which has been reported in other literature studies. The result is similar to those of previous studies , (Supporting Information). Figure d explores the relationship between lithium concentration and conductivity.…”

Section: Resultssupporting

confidence: 93%

High-Safety and Dendrite-Free Lithium Metal Batteries Enabled by Building a Stable Interface in a Nonflammable Medium-Concentration Phosphate Electrolyte

Zhang

Wei

et al. 2021

ACS Appl. Mater. Interfaces

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Lithium metal anodes are promising for their high energy density and low working potential. However, high reactivity and dendrite growth of lithium metal lead to serious safety issues. Lithium dendrite may form "dead lithium" or pierce the separator, which will cause low efficiency and short-circuit inside the battery. A nonflammable phosphate-based electrolyte can effectively solve the flammability problem. Also, it shows poor compatibility with lithium metal anodes, resulting in an unstable solid electrolyte interface (SEI), which leads to dendrite growth and poor electrochemical performance. In this study, trimethyl phosphate is used to ensure the safety of lithium metal batteries. By adjusting the concentration of lithium salt and introducing fluoroethylene carbonate, a stable SEI layer is formed on the surface of the lithium metal anode and dendrite growth of the lithium metal anode is inhibited. Lithium metal batteries with a modified electrolyte achieved stable electrochemical plating/stripping, and the full cell has 93.4% capacity left and the coulombic efficiency is nearly 100%. In addition, the modified electrolyte can also enable reversible intercalation and de-intercalation of Li + in the commercial graphite anode. This work may provide an alternative direction for the development of lithium metal batteries with high safety and high energy density.

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Section: Resultssupporting

confidence: 93%

High-Safety and Dendrite-Free Lithium Metal Batteries Enabled by Building a Stable Interface in a Nonflammable Medium-Concentration Phosphate Electrolyte

Zhang

Wei

et al. 2021

ACS Appl. Mater. Interfaces

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“…Likewise, in the bulk electrolyte, the chemical and thermal stability of electrolyte is influenced by the solvation structure of sodium ions to some extent. [ 25 , 40 ] 4) Aside sodium ion conductivity, SEI composition, and solvation structure of sodium ions, the thermodynamic HOMO energies of anions upon oxidation could limit the potential window of electrolytes to a certain extent, thus limiting the total energy density of SIBs. 5) The chemical toxicity and corrosive nature of most sodium salts has important ramifications for battery safety in practical applications.…”

Section: Requirements Of Ideal Electrolytesmentioning

confidence: 99%

Electrolyte Solvation Structure Design for Sodium Ion Batteries

et al. 2022

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Sodium ion batteries (SIBs) are considered the most promising battery technology in the post‐lithium era due to the abundant sodium reserves. In the past two decades, exploring new electrolytes for SIBs has generally relied on the “solid electrolyte interphase (SEI)” theory to optimize the electrolyte components. However, many observed phenomena cannot be fully explained by the SEI theory. Therefore, electrolyte solvation structure and electrode–electrolyte interface behavior have recently received tremendous research interest to explain the improved performance. Considering there is currently no review paper focusing on the solvation structure of electrolytes in SIBs, a systematic survey on SIBs is provided, in which the specific solvation structure design guidelines and their consequent impact on the electrochemical performance are elucidated. The key driving force of solvation structure formation, and the recent advances in adjusting SIB solvation structures are discussed in detail. It is believed that this review can provide new insights into the electrolyte optimization strategies of high‐performance SIBs and even other emerging battery systems.

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“…TheCEofLideposition was maintained at over 99 %for 140 cycles. [116] Others [117,118] have also employed HCE to stabilize the Li-metal anode in the phosphate electrolyte.U nfortunately,t he high cost of Li salt, high viscosity,a nd low ionic conductivity of HCE hinder its practical application. Forthis reason, some diluents were adding into the HCE electrolyte to form LHCE.…”

Section: Phosphate-based Electrolytesmentioning

confidence: 99%

Advanced Electrolyte Design for High‐Energy‐Density Li‐Metal Batteries under Practical Conditions

et al. 2021

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Given the limitations inherent in current intercalation‐based Li‐ion batteries, much research attention has focused on potential successors to Li‐ion batteries such as lithium–sulfur (Li‐S) batteries and lithium–oxygen (Li‐O2) batteries. In order to realize the potential of these batteries, the use of metallic lithium as the anode is essential. However, there are severe safety hazards associated with the growth of Li dendrites, and the formation of “dead Li” during cycles leads to the inevitable loss of active Li, which in the end is undoubtedly detrimental to the actual energy density of Li‐metal batteries. For Li‐metal batteries under practical conditions, a low negative/positive ratio (N/P ratio), a electrolyte/cathode ratio (E/C ratio) along with a high‐voltage cathode is prerequisite. In this Review, we summarize the development of new electrolyte systems for Li‐metal batteries under practical conditions, revisit the design criteria of advanced electrolytes for practical Li‐metal batteries and provide perspectives on future development of electrolytes for practical Li‐metal batteries.

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Regulating the Solvation Structure of Nonflammable Electrolyte for Dendrite-Free Li-Metal Batteries

Cited by 23 publications

References 42 publications

High-Safety and Dendrite-Free Lithium Metal Batteries Enabled by Building a Stable Interface in a Nonflammable Medium-Concentration Phosphate Electrolyte

High-Safety and Dendrite-Free Lithium Metal Batteries Enabled by Building a Stable Interface in a Nonflammable Medium-Concentration Phosphate Electrolyte

Electrolyte Solvation Structure Design for Sodium Ion Batteries

Advanced Electrolyte Design for High‐Energy‐Density Li‐Metal Batteries under Practical Conditions

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