Kinetically Favorable Li–S Battery Electrolytes

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(7), P. 3054 - 3080

Published: June 20, 2023

Lithium–sulfur (Li–S) batteries suffer from rampant polysulfide shuttling and sluggish reaction kinetics, which have curtailed sulfur utilization deteriorated their actual performance. To circumvent these detrimental issues, electrolyte engineering is a reliable strategy to control behavior facilitate kinetics. However, the electrolyte–polysulfide nexus remains elusive, design principle far clear, especially for pragmatic application. In this Review, key approaches obtain kinetically favorable Li–S battery electrolytes are elucidated three perspectives: (i) high-donor-number components, (ii) homogeneous catalysts, (iii) endogenous co-mediators. Particular attention paid probing underlying working mechanism. addition, kinetics electrochemical performances systematically studied, highlighting strategic effectiveness of in lean-electrolyte conditions. This Review aims offer meaningful guidance rational enhance performance advance commercialization batteries.

Language: Английский

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Band Structure Engineering and Orbital Orientation Control Constructing Dual Active Sites for Efficient Sulfur Redox Reaction

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(2)

Published: Oct. 18, 2023

Abstract The kinetics difference among multistep electrochemical processes leads to the accumulation of soluble polysulfides and thus shuttle effect in lithium−sulfur (Li−S) batteries. While interaction between catalysts representative species has been reported, root difference, change redox reactions, remains unclear, which significantly impedes design for Li−S Here, this work deciphers electrocatalytic sulfur using tungsten disulfide (WS 2 ) a model system demonstrate efficiency modifying selectivity via dual‐coordination design. Band structure engineering orbital orientation control are combined guide WS with boron dopants vacancies (B−WS 2− x ), accurately modulating lithium sites polysulfide relatively higher short‐chain polysulfides. modified trend is experimentally confirmed by distinguishing each reaction step, indicating effectiveness designed strategy. An Ah‐level pouch cell B−WS delivers gravimetric energy density up 417.6 Wh kg −1 low electrolyte/sulfur ratio 3.6 µL mg negative/positive 1.2. This presents strategy advancing evolutionarily catalytic activity, offering rational develop effective practical

Language: Английский

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Bridging the gap between academic research and industrial development in advanced all-solid-state lithium–sulfur batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(10), P. 5264 - 5290

Published: Jan. 1, 2024

The energy storage and vehicle industries are heavily investing in advancing all-solid-state batteries to overcome critical limitations existing liquid electrolyte-based lithium-ion batteries, specifically focusing on mitigating fire hazards improving density. All-solid-state lithium-sulfur (ASSLSBs), featuring earth-abundant sulfur cathodes, high-capacity metallic lithium anodes, non-flammable solid electrolytes, hold significant promise. Despite these appealing advantages, persistent challenges like sluggish redox kinetics, metal failure, electrolyte degradation, manufacturing complexities hinder their practical use. To facilitate the transition of technologies an industrial scale, bridging gap between fundamental scientific research applied R&D activities is crucial. Our review will address inherent cell chemistries within ASSLSBs, explore advanced characterization techniques, delve into innovative structure designs. Furthermore, we provide overview recent trends investment from both academia industry. Building understandings progress that has been made thus far, our objective motivate battery community advance ASSLSBs a direction propel industrialized process.

Language: Английский

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Precisely optimizing polysulfides adsorption and conversion by local coordination engineering for high-performance Li-S batteries

Nano Energy, Journal Year: 2023, Volume and Issue: 110, P. 108353 - 108353

Published: March 15, 2023

Language: Английский

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Atomically Dispersed Fe–N₄ and Ni–N₄ Independent Sites Enable Bidirectional Sulfur Redox Electrocatalysis

Nano Letters, Journal Year: 2023, Volume and Issue: 23(9), P. 4000 - 4007

Published: April 26, 2023

Single-atom catalysts (SACs) with high atom utilization and outstanding catalytic selectivity are useful for improving battery performance. Herein, atomically dispersed Ni-N4 Fe-N4 dual sites coanchored on porous hollow carbon nanocages (Ni-Fe-NC) fabricated deployed as the sulfur host Li-S battery. The conductive matrix promotes electron transfer also accommodates volume fluctuation during cycling. Notably, d band center of Fe in site demonstrates strong polysulfide affinity, leading to an accelerated reduction reaction. Meanwhile, Li2S delivers a metallic property S 2p density states around Femi energy level, enabling low evolution reaction barrier. effect Ni-Fe-NC endows cathode density, prolonged lifespan, polarization.

Language: Английский

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Unraveling the Coupling Effect between Cathode and Anode toward Practical Lithium–Sulfur Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(1)

Published: July 27, 2023

Abstract The localized reaction heterogeneity of the sulfur cathode and uneven Li deposition on anode are intractable issues for lithium–sulfur (Li–S) batteries under practical operation. Despite impressive progress in separately optimizing or anode, a comprehensive understanding highly coupled relationship between is still lacking. In this work, inspired by Butler–Volmer equation, binary descriptor ( I BD ) assisting rational structural design simultaneously considering mass‐transport index mass charge‐transfer charge identified, subsequently morphological evolution established. Guided , scalable electrode providing interpenetrated flow channels efficient mass/charge transfer, full utilization active sulfur, mechanically elastic support aggressive electrochemical reactions conditions reported. These characteristics induce homogenous distribution local current densities reduced both sides anode. Impressive energy density 318 Wh kg −1 473 L an Ah‐level pouch cell can be achieved concept. This work offers promising paradigm unlocking interaction designing high‐energy Li–S batteries.

Language: Английский

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An Electrolyte Engineered Homonuclear Copper Complex as Homogeneous Catalyst for Lithium–Sulfur Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 17, 2024

Abstract Lithium–sulfur (Li–S) batteries suffer from severe polysulfide shuttle, retarded sulfur conversion kinetics and notorious lithium dendrites, which has curtailed the discharge capacity, cycling lifespan safety. Engineered catalysts act as a feasible strategy to synchronously manipulate evolution behaviors of species. Herein, chlorine bridge‐enabled binuclear copper complex (Cu‐2‐T) is in situ synthesized electrolyte homogeneous catalyst for rationalizing Li–S redox reactions. The well‐designed Cu‐2‐T provides completely active sites sufficient contact homogeneously guiding Li 2 S nucleation/decomposition reactions, stabilizing working interface according synchrotron radiation X‐ray 3D nano‐computed tomography, small angle neutron scattering COMSOL results. Moreover, with content 0.25 wt% approaching saturated concentration further boosts optimization function really operated batteries. Accordingly, capacity retention battery elevated 51.4% 86.3% at 0.2 C, reaches 77.0% 1.0 C over 400 cycles. Furthermore, cathode assistance realizes stable under practical scenarios soft‐packaged pouch cell high loading (6.5 mg cm −2 usage 4.5 µL −1 ).

Language: Английский

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Engineering Defect‐Rich Bimetallic Telluride with Dense Heterointerfaces for High‐Performance Lithium–Sulfur Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 23, 2024

Abstract Rechargeable lithium–sulfur (Li–S) batteries have received ever‐increasing attention owing to their ultrahigh theoretical energy density, low cost, and environmental friendliness. However, practical application is critically plagued by the sluggish reaction kinetics, shuttling of soluble polysulfide intermediates, uncontrollable growth Li dendrites. Herein, a bimetallic telluride electrocatalyst with dense heterointerfaces rich defects embedded in hollow carbon polyhedron bunches (N⊂CoTe 1 ‐x /ZnTe ‐y @NC, abbreviated as NCZTC) rationally designed simultaneously address S cathode anode problems. Both experimental computational results substitute integration can synergistically modulate electronic structure, enhance electrical conductivity, promote + transportation, strengthen polysulfides adsorption improve catalytic activity, thereby significantly accelerating redox conversion kinetics prevent dendrite growth. Consequently, Li–S NCZTC‐modified separators demonstrate excellent electrochemical performance including high specific discharge capacity, remarkable rate capability, good long‐term cycling stability, competitive areal capacity even at sulfur loading lean electrolyte conditions. This study not only provides valuable guidance for designing efficient electrocatalysts transition metal tellurides but also emphasizes importance heterostructure design defect engineering high‐performance batteries.

Language: Английский

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One-step growth of ultrathin CoSe2 nanobelts on N-doped MXene nanosheets for dendrite-inhibited and kinetic-accelerated lithium–sulfur chemistry

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(13), P. 2059 - 2070

Published: March 21, 2024

Language: Английский

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A review of direct recycling methods for spent lithium-ion batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: 70, P. 103475 - 103475

Published: May 17, 2024

Language: Английский

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