Dependence of LiNO 3 decomposition on cathode binders in Li–S batteries

Godoi, Fernanda Condi de; Wang, Da‐Wei; Zeng, Qingcong; Wu, Kuang‐Hsu; Gentle, Ian R.

doi:10.1016/j.jpowsour.2015.04.064

Cited by 48 publications

(35 citation statements)

References 16 publications

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“…This is probably the result of LiNO 3 decomposition on cathode surface that eventually starts to hinder its normal lithiation-deliation processes. 25,26 …”

Section: Resultsmentioning

confidence: 99%

Interaction of FeS₂and Sulfur in Li-S Battery System

Sun

Cama

DeMayo

et al. 2016

J. Electrochem. Soc.

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Many transition metal sulfides are electronically conductive, electrochemically active and reversible in reactions with lithium. However, the application of transition metal sulfides as sulfur cathode additives in lithium-sulfur (Li-S) batteries has not been fully explored. In this study, Pyrite (FeS 2 ) is studied as a capacity contributing conductive additive in sulfur cathode for Li-S batteries. Electrochemically discharging the S-FeS 2 composite electrodes to 1.0 V activates the FeS 2 component, contributing to the improved Li-S cell discharge energy density. However, direct activation of the FeS 2 component in a fresh S-FeS 2 cell results in a significant shuttling effect in the subsequent charging process, preventing further cell cycling. The slight FeS 2 solubility in electrolyte and its activation alone in S-FeS 2 cells are not the root causes of the severe shuttling effect. The observed severe shuttling effect is strongly correlated to the 1 st charging of the activated S-FeS 2 electrode that promotes iron dissolution in electrolyte and the deposition of electronically conductive FeS on the anode SEI. Pre-cycling of the S-FeS 2 cell prior to the FeS 2 activation or the use of LiNO 3 electrolyte additive help to prevent the severe shuttling effect and allow the cell to cycle between 2.6 V to 1.0 V with an extra capacity contribution from the FeS 2 components. However, a more effective method of anode pre-passivation is still needed to fully protect the lithium surface from FeS deposition and allow the S-FeS 2 electrode to maintain high energy density over extended cycles. A mechanism explaining the observed phenomena based on the experimental data is proposed and discussed.

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“…This is probably the result of LiNO 3 decomposition on cathode surface that eventually starts to hinder its normal lithiation-deliation processes. 25,26 …”

Section: Resultsmentioning

confidence: 99%

Interaction of FeS₂and Sulfur in Li-S Battery System

Sun

Cama

DeMayo

et al. 2016

J. Electrochem. Soc.

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“…However, there is a great concern with high energy density LiS and LiO 2 batteries, where the discharge products of the cathode materials, such as polysulfides or oxygen, can approach the anode surface and react with components in the SEI leading to further complications . LiNO 3 has been widely used as additive in LiS batteries to protect the Li from polysulfide attack . Interestingly, under optimized concentrations, Li polysulfides and LiNO 3 have been found to function as additives in an ether‐based electrolyte and have helped to achieve a more stable and uniform SEI layer on the Li surface than LiNO 3 alone (Figure c,d) .…”

Section: Strategies For Developing Stable LI Metal Anodesmentioning

confidence: 99%

“…[2,8,141] LiNO 3 has been widely used as additive in LiS batteries to protect the Li from polysulfide attack. [9,10,142] Interestingly, under optimized concentrations, Li polysulfides and LiNO 3 have been found to function as additives in an ether-based electrolyte and have helped to achieve a more stable and uniform SEI layer on the Li surface than LiNO 3 alone (Figure 12c,d). [143] Besides LiNO 3 , Jia et al [144] used KNO 3 as an electrolyte additive to protect the Li anode due to its synergistic effect of controlling dendrite growth through the shielding effect of K + and increasing the functionality of the SEI by the incorporation of NO − 3 .…”

Section: In Situ Formation Of An Sei On LI Metal Anodementioning

confidence: 99%

Key Aspects of Lithium Metal Anodes for Lithium Metal Batteries

Ghazi

Sun

et al. 2019

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Rechargeable batteries are considered promising replacements for environmentally hazardous fossil fuel‐based energy technologies. High‐energy lithium‐metal batteries have received tremendous attention for use in portable electronic devices and electric vehicles. However, the low Coulombic efficiency, short life cycle, huge volume expansion, uncontrolled dendrite growth, and endless interfacial reactions of the metallic lithium anode are major obstacles in their commercialization. Extensive research efforts have been devoted to address these issues and significant progress has been made by tuning electrolyte chemistry, designing electrode frameworks, discovering nanotechnology‐based solutions, etc. This Review aims to provide a conceptual understanding of the current issues involved in using a lithium metal anode and to unveil its electrochemistry. The most recent advancements in lithium metal battery technology are outlined and suggestions for future research to develop a safe and stable lithium anode are presented.

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“…The repeated solid (sulfur) –liquid (polysulfides) –solid (sulfides) phase transformations and significant volumetric expansion(≈80 %) of sulfur upon lithiation, resulting in rapid capacity decay during the charging and discharging process . Over the years, extensive efforts have been devoted to improving the performance of sulfur cathodes from different perspectives, such as matrix, electrolyte, separator, and binder …”

Section: Introductionmentioning

confidence: 99%

“…[2,9] Over the years, extensive efforts have been devoted to improving the performance of sulfur cathodes from different perspectives, such as matrix, electrolyte, [11] separator, [12] and binder. [13] Recently,t he availablem atrix materials have thus far been used to improve the conductivity of the sulfur cathode and suppress the diffusionl oss of the soluble polysulfide, by impregnating/encapsulating sulfur into conducting carbon materials, including meso-/microporous carbon, [14][15][16] hollow carbon spheres, [17,18] carbon nanotubes/nanofibers, [19,20] polymer, [21,22] carbon-polymer composites, [23,24] graphene/N (S)-doped graphene, [25][26][27] ands of orth. Among thesec arbonaceous materials, graphene with au nique two-dimensional plane has been confirmed as as tabilizing host for the sulfur because of its excellent electrical conductivity,m echanical strength and flexibility,a nd large specific surfacea rea in the Li-S batteries.…”

Section: Introductionmentioning

confidence: 99%

Facile Assembly of 3D Porous Reduced Graphene Oxide/Ultrathin MnO₂ Nanosheets‐S Aerogels as Efficient Polysulfide Adsorption Sites for High‐Performance Lithium–Sulfur Batteries

Zhao

Wang

Zhai

et al. 2017

Chemistry A European J

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Rechargeable lithium-sulfur (Li-S) batteries are receiving much attention due to their high specific capacity, low cost, and environmental friendliness. Nonetheless, fast capacity decay and low specific capacity still limit their practical implementation. Herein, we report a facile strategy to overcome these challenges by the design and fabrication of 3D porous reduced graphene oxide/ultrathin MnO nanosheets-S aerogel (rGM-SA) composites for Li-S batteries. By a simple solvothermal reaction process, nanosized S atoms are homogeneously decorated into the 3D scaffold formed by reduced graphene oxide (rGO) and MnO nanosheets, which can form the homogeneous rGM-SA composites. In this porous network architecture, rGO serves as an electron and ion transfer pathway, a physical adsorption site for polysulfides, and provides structural stability. The ultrathin MnO nanosheets provide strong binding sites for trapping polysulfide intermediates. The 3D porous rGO/MnO architecture enables rapid ion transport and buffers volume expansion of sulfur during discharge. The rGM-SA composites can be directly used as lithium-sulfur battery cathodes without using binder and conductive additive. As a result of this multifunctional arrangement, the rGM-SA composites exhibit high and stable-specific capacities over 200 cycles and excellent high-rate performances.

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Dependence of LiNO 3 decomposition on cathode binders in Li–S batteries

Cited by 48 publications

References 16 publications

Interaction of FeS₂and Sulfur in Li-S Battery System

Interaction of FeS₂and Sulfur in Li-S Battery System

Key Aspects of Lithium Metal Anodes for Lithium Metal Batteries

Facile Assembly of 3D Porous Reduced Graphene Oxide/Ultrathin MnO₂ Nanosheets‐S Aerogels as Efficient Polysulfide Adsorption Sites for High‐Performance Lithium–Sulfur Batteries

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Dependence of LiNO 3 decomposition on cathode binders in Li–S batteries

Cited by 48 publications

References 16 publications

Interaction of FeS2and Sulfur in Li-S Battery System

Interaction of FeS2and Sulfur in Li-S Battery System

Key Aspects of Lithium Metal Anodes for Lithium Metal Batteries

Facile Assembly of 3D Porous Reduced Graphene Oxide/Ultrathin MnO2 Nanosheets‐S Aerogels as Efficient Polysulfide Adsorption Sites for High‐Performance Lithium–Sulfur Batteries

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Interaction of FeS₂and Sulfur in Li-S Battery System

Interaction of FeS₂and Sulfur in Li-S Battery System

Facile Assembly of 3D Porous Reduced Graphene Oxide/Ultrathin MnO₂ Nanosheets‐S Aerogels as Efficient Polysulfide Adsorption Sites for High‐Performance Lithium–Sulfur Batteries