Displacement reaction-based Ag2S electrode for lithium batteries with high volumetric energy density

Hao, Weijian; Si, Huinan; Zhu, Wentao; Qiu, Xinping

doi:10.1016/j.ssi.2019.115015

Cited by 7 publications

(8 citation statements)

References 39 publications

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“…5b). The latter value corresponds well with the one previously reported for an Ag 2 S electrode by Hao et al 21 (215 mA h g −1 ). This behaviour suggested that the initial rapid capacity decrease was due to the irreversible formation of an SEI layer and the solvation of polysulfides followed by stable cycling associated with the Ag 2 S–Cu x S displacement reaction.…”

Section: Resultssupporting

confidence: 92%

“…The latter is promoted by the fast mobility of silver and copper ions and the structural similarity of Ag 2 S and Cu x S (x = 1-2) phases with the Li 2 S product. 20,21 Such fast Li + kinetics leads to a low voltage hysteresis, a low volume expansion and an improved cycling stability as well as rate performances. 22 Using a slurry coated Ag 2 S/C electrode, Hao et al 21 reported first discharge and charge capacities of 209 and 201 mA h g −1 , respectively ( potential range 1.5 V-2.5 V vs. Li/Li+; at 0.2C rate).…”

Section: Introductionmentioning

confidence: 99%

“…20,21 Such fast Li + kinetics leads to a low voltage hysteresis, a low volume expansion and an improved cycling stability as well as rate performances. 22 Using a slurry coated Ag 2 S/C electrode, Hao et al 21 reported first discharge and charge capacities of 209 and 201 mA h g −1 , respectively ( potential range 1.5 V-2.5 V vs. Li/Li+; at 0.2C rate). A relatively good capacity retention close to 88% was achieved after 300 cycles.…”

Section: Introductionmentioning

confidence: 99%

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On the performance of a hierarchically porous Ag₂S–Cu_xS electrode in Li-ion batteries

et al. 2022

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the performance of a hierarchically porous Ag₂S–Cu_xS electrode in Li-ion batteries

et al. 2022

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“…At low potentials, silver is known to undergo a size-dependent reversible electrochemical alloying process with lithium; , however, there are limited examples of reversible silver metal/silver ion electrochemistry at potentials suitable for a cathode material (i.e., >1.5 V versus lithium). For example, reversible silver electrochemistry has been reported for silver vanadium oxide − and silver sulfide materials in nonaqueous lithium-based batteries.…”

Section: Introductionmentioning

confidence: 99%

Vanadium-Substituted Tunnel Structured Silver Hollandite (Ag_1.2V_xMn_8–xO₁₆): Impact on Morphology and Electrochemistry

et al. 2020

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A series of tunnel structured V-substituted silver hollandite (Ag 1.2 V x Mn 8−x O 16 , x = 0−1.4) samples is prepared and characterized through a combination of synchrotron X-ray diffraction (XRD), synchrotron X-ray absorption spectroscopy (XAS), laboratory Raman spectroscopy, and electron microscopy measurements. The oxidation states of the individual transition metals are characterized using V and Mn K-edge XAS data indicating the vanadium centers exist as V 5+ , and the Mn oxidation state decreases with increased V substitution to balance the charge. Scanning transmission electron microscopy of reduced materials shows reduction-displacement of silver metal at high levels of lithiation. In lithium batteries, the V-substituted tunneled manganese oxide materials reveal previously unseen reversible nonaqueous Ag electrochemistry and exhibit up to 2.5× higher Li storage capacity relative to their unsubstituted counterparts. The highest capacity was observed for the Ag 1.2 (V 0.8 Mn 7.2 )O 16 •0.8H 2 O material with an intermediate level of V substitution, likely due to a combination of the atomic composition, the morphology of the particle, and the homogeneous distribution of the active material within the electrode structure where factors over multiple length scales contribute to the electrochemistry.

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“…At the same time, because of the large pore volume of carbon materials, a large amount of electrolyte is required to infiltrate porous S/C cathodes, which is contrary to improving the overall energy density of the Li-S battery. 16,17 In light of these problems, metal-based compounds (MX) with high tap density, including metallic oxides, [18][19][20] sulfides, [21][22][23][24] carbides, 25 nitrides, 26 boride, 27 and phosphides, 28 i.e., MX, M = Co, Mn, Mo, Fe, V, Ti, Ru, Ag, Mg; X = O, S, C, N, B, P, have been explored to immobilize the polysulfides by the strong chemical interaction and electrocatalysis process. Besides, it has been reported that electrodes of some transition-metal compounds can react with lithium in reversible conversion reaction to produce conductive metal element during the discharge process, 24,29,30 then improving the conductivity of the electrode, accelerating the transmission of electrons and decreasing the electrochemical impedance.…”

mentioning

confidence: 99%

Silver Iodide as a Host Material of Sulfur for Li–S Battery

Liu

et al. 2021

J. Electrochem. Soc.

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Rechargeable lithium–sulfur (Li–S) batteries are recognized as one of the most promising candidates for next-generation energy storage devices due to their high energy density and high theoretical capacity, along with abundant natural resources, low cost, and the non-toxicity of sulfur. However, applications of Li–S battery have been hindered by limited specific capacity due to the poor conductivity and low content of sulfur, as well as fast capacity fading caused by polysulfide shuttling problems. Here, silver iodide is introduced as a host material for fabricating sulfur cathodes for Li–S batteries. Silver metal and lithium iodide, as the discharge products of silver iodide, can improve the redox environment, increase the ionic and electronic conductivity, and inhibit the shuttle of polysulfides during the charge and discharge processes. With a high sulfur content of 90.4%, the S/AgI composite delivers enhanced cycle performance with a decay rate of 0.092% per cycle within 500 cycles at 0.5 C, thanks to the synergistic effect of silver and lithium iodide. This opens the door to the rational design of halogen-containing transition-metal compounds as a class of cathode materials for Li–S battery.

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Displacement reaction-based Ag2S electrode for lithium batteries with high volumetric energy density

Cited by 7 publications

References 39 publications

On the performance of a hierarchically porous Ag₂S–Cu_xS electrode in Li-ion batteries

On the performance of a hierarchically porous Ag₂S–Cu_xS electrode in Li-ion batteries

Vanadium-Substituted Tunnel Structured Silver Hollandite (Ag_1.2V_xMn_8–xO₁₆): Impact on Morphology and Electrochemistry

Silver Iodide as a Host Material of Sulfur for Li–S Battery

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Displacement reaction-based Ag2S electrode for lithium batteries with high volumetric energy density

Cited by 7 publications

References 39 publications

On the performance of a hierarchically porous Ag2S–CuxS electrode in Li-ion batteries

On the performance of a hierarchically porous Ag2S–CuxS electrode in Li-ion batteries

Vanadium-Substituted Tunnel Structured Silver Hollandite (Ag1.2VxMn8–xO16): Impact on Morphology and Electrochemistry

Silver Iodide as a Host Material of Sulfur for Li–S Battery

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On the performance of a hierarchically porous Ag₂S–Cu_xS electrode in Li-ion batteries

On the performance of a hierarchically porous Ag₂S–Cu_xS electrode in Li-ion batteries

Vanadium-Substituted Tunnel Structured Silver Hollandite (Ag_1.2V_xMn_8–xO₁₆): Impact on Morphology and Electrochemistry