<i>In Situ</i> Localized Polysulfide Injector for the Activation of Bulk Lithium Sulfide

Li, Matthew; Shi, Jiayan; Son, Seoung‐Bum; Luo, Dan; Bloom, Ira; Chen, Zhongwei; Amine, Khalil

doi:10.1021/jacs.0c11265

Cited by 35 publications

(29 citation statements)

References 24 publications

(24 reference statements)

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“…The heterogeneous interfacial processes among solid S 8 , soluble LiPSs, and solid Li 2 S involve interfacial electron transfer and a solid–liquid phase transition that are highly dependent on a conductive substrate to ensure the necessary electron pathway . Meanwhile, there are homogeneous processes taking place in the electrolyte such as liquid–liquid transformations between soluble LiPSs and the associated comproportionation and disproportionation reactions taking place in the electrolyte. − The heterogeneous and homogeneous processes are highly coupled in working Li–S batteries to synergistically influence the overall battery performances . Despite the distinct characteristics, both processes require kinetic promotion and targeted high-efficiency electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Semi-Immobilized Molecular Electrocatalysts for High-Performance Lithium–Sulfur Batteries

et al. 2021

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Lithium–sulfur (Li–S) batteries constitute promising next-generation energy storage devices due to the ultrahigh theoretical energy density of 2600 Wh kg–1. However, the multiphase sulfur redox reactions with sophisticated homogeneous and heterogeneous electrochemical processes are sluggish in kinetics, thus requiring targeted and high-efficient electrocatalysts. Herein, a semi-immobilized molecular electrocatalyst is designed to tailor the characters of the sulfur redox reactions in working Li–S batteries. Specifically, porphyrin active sites are covalently grafted onto conductive and flexible polypyrrole linkers on graphene current collectors. The electrocatalyst with the semi-immobilized active sites exhibits homogeneous and heterogeneous functions simultaneously, performing enhanced redox kinetics and a regulated phase transition mode. The efficiency of the semi-immobilizing strategy is further verified in practical Li–S batteries that realize superior rate performances and long lifespan as well as a 343 Wh kg–1 high-energy-density Li–S pouch cell. This contribution not only proposes an efficient semi-immobilizing electrocatalyst design strategy to promote the Li–S battery performances but also inspires electrocatalyst development facing analogous multiphase electrochemical energy processes.

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Section: Introductionmentioning

confidence: 99%

Semi-Immobilized Molecular Electrocatalysts for High-Performance Lithium–Sulfur Batteries

et al. 2021

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“…The battery community intends to pursue innovative energy-storage technologies beyond conventional lithium-ion batteries to reduce the cost and enhance the energy density of electric vehicles (EVs) and renewable energy storage. − Intensive efforts have been made in the past decade to develop lithium–sulfur (Li–S) batteries consisting of a lithium–metal anode and a sulfur cathode. Sulfur is earth-abundant and has a high theoretical capacity of 1675 mA h g –1 , making it a good option for EVs. − However, from a sustainability and economics point of view, sodium–sulfur (Na–S) batteries are the “dream technology,” owing to their analogous chemistry and the better affordability and earth-abundance of sodium compared to lithium. − …”

Section: Introductionmentioning

confidence: 99%

Stable Dendrite-Free Sodium–Sulfur Batteries Enabled by a Localized High-Concentration Electrolyte

et al. 2021

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Ambient-temperature sodium–sulfur batteries are an appealing, sustainable, and low-cost alternative to lithium-ion batteries due to their high material abundance and specific energy of 1274 W h kg–1. However, their viability is hampered by Na polysulfide (NaPS) shuttling, Na loss due to side reactions with the electrolyte, and dendrite formation. Here, we demonstrate that a solid–electrolyte interphase rich in inorganic components can be realized at both the sulfur cathode and the Na anode by tweaking the solvation structure of the electrolyte. This transforms the sulfur redox process from conventional dissolution–precipitation chemistry into a quasi-solid-state reaction, which eliminates NaPS shuttling and facilitates dendrite-free Na-metal plating and stripping. With the solvated ionic liquid electrolyte structure, a high initial capacity of 922 mA h g–1 with a capacity fade of as low as 0.10% per cycle over 300 cycles was achieved. The scalability of this approach to pouch cells with practically necessary parameters demonstrates its potential for practical viability.

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“…2.3 V) (Fig. 3, A and B) (10,26,(30)(31)(32)(33)(34)(35)(36)(37). It suggests that the nanosize effect plays an important but not sole role in activating Li 2 S@Co-C@MHF cathode with ease.…”

Section: Half-cell Performance Of LI 2 S-based Cathodementioning

confidence: 94%

A Li ₂ S-based all-solid-state battery with high energy and superior safety

et al. 2022

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Safety risks stem from applying extremely reactive alkali metal anodes and/or oxygen-releasing cathodes in flammable liquid electrolytes restrict the practical use of state-of-the-art high-energy batteries. Here, we propose a intrinsically safe solid-state cell chemistry to satisfy both high energy and cell reliability. An all-solid-state rechargeable battery is designed by energetic yet stable multielectron redox reaction between Li 2 S cathode and Si anode in robust solid-state polymer electrolyte with fast ionic transport. Such cells can deliver high specific energy of 500 to 800 Wh kg −1 for 500 cycles with fast rate response, negligible self-discharge, and good temperature adaptability. Integrating intrinsic safe cell chemistry to robust cell design further guarantees reversible energy storage against extreme abuse of overheating, overcharge, short circuit, and mechanical damage in the air and water. This work may shed fresh insight into bridging the huge gap between high energy and safety of rechargeable cells for feasible applications and recycle.

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In Situ Localized Polysulfide Injector for the Activation of Bulk Lithium Sulfide

Cited by 35 publications

References 24 publications

Semi-Immobilized Molecular Electrocatalysts for High-Performance Lithium–Sulfur Batteries

Semi-Immobilized Molecular Electrocatalysts for High-Performance Lithium–Sulfur Batteries

Stable Dendrite-Free Sodium–Sulfur Batteries Enabled by a Localized High-Concentration Electrolyte

A Li ₂ S-based all-solid-state battery with high energy and superior safety

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In Situ Localized Polysulfide Injector for the Activation of Bulk Lithium Sulfide

Cited by 35 publications

References 24 publications

Semi-Immobilized Molecular Electrocatalysts for High-Performance Lithium–Sulfur Batteries

Semi-Immobilized Molecular Electrocatalysts for High-Performance Lithium–Sulfur Batteries

Stable Dendrite-Free Sodium–Sulfur Batteries Enabled by a Localized High-Concentration Electrolyte

A Li 2 S-based all-solid-state battery with high energy and superior safety

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Product

Resources

About

A Li ₂ S-based all-solid-state battery with high energy and superior safety