Advanced electrolytes for high-performance aqueous zinc-ion batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This review presents an comprehensive overview of various advanced aqueous electrolytes for zinc-ion batteries, including “water-in-salt” electrolytes, eutectic molecular crowding and hydrogel electrolytes.

Language: Английский

---

Valence Electron: A Descriptor of Spinel Sulfides for Sulfur Reduction Catalysis

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract Catalysts are essential for achieving high‐performance lithium–sulfur batteries. The precise design and regulation of catalytic sites to strengthen their efficiency robustness remains challenging. In this study, spinel sulfides catalyst principles through element doping investigated. This research highlights the distinct role lattice sulfur in lithium polysulfide conversion emphasizes differences activity between metal anion sites. valence electron model as a descriptor can characterize performance, guiding (FeCo) 3 (PS) 4 co‐doped with cation anion. exhibits highest performance among catalysts data, particularly under high loading conditions. It achieves an initial specific capacity 1205.9 mAh g −1 (6.1 cm −2 ) at 5 mg 1192.7 (11.9 10 , demonstrating excellent electrocatalytic performance.

Language: Английский

---

Magnetopyrite Fe1−xS modified with N/S-doped carbon as a synergistic electrocatalyst for lithium-sulfur batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 180 - 191

Published: Jan. 7, 2025

Language: Английский

---

Regulating Homogeneous Reactions for Stable Lithium Metal Batteries

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Discontinuous and uneven Li+ flux leads to inhomogeneous reactions, accelerating lithium (Li) dendrite growth reducing the utilization of active materials, which severely impacts performance metal batteries (LMBs). To address this challenge, we propose an effective homogeneous reaction design facilitated by all-aligned nanofibrous architecture, establishes continuous, uniform, rapid pathways throughout battery. This enhances diffusion dynamics ensures a uniform distribution current density, hence promoting Li nucleation at anode efficient insertion/extraction cathode. Moreover, architecture exhibits superior mechanical strength flexibility, maintaining structural stability during long-term cycling suppressing growth, thereby minimizing risk short circuits. As result, LMBs incorporating exhibit exceptional electrochemical performance. work provides valuable insights into reactions for high-performance LMBs.

Language: Английский

---

Metal–organic framework derived micro-/nano-materials: precise synthesis and clean energy applications

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(19), P. 6275 - 6306

Published: Jan. 1, 2024

We summarize the different synthetic strategies of MOF-derived micro-/nano-materials to date, including but not limited calcining, phosphating, sulfurization, selenylation method, ion exchange, and etching strategies.

Language: Английский

---

Accelerating sulfur reduction kinetics through establishing a balancing network in adsorption-catalysis-conversion of polysulfide by sulfur-affinity metal iron

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 687, P. 353 - 364

Published: Feb. 11, 2025

Language: Английский

---

Advanced Characterization Techniques for Probing Redox Reaction Mechanisms in High‐Performance Li–S Batteries

Carbon Neutralization, Journal Year: 2025, Volume and Issue: 4(2)

Published: Feb. 19, 2025

ABSTRACT The development of high‐performance energy storage systems requires several key attributes, including high and power density, cost‐effectiveness, safety, environmental sustainability. Among the various potential technologies, lithium–sulfur batteries stand out as a promising contender for future solutions due to their exceptional theoretical specific density (2600 Wh kg⁻¹) relatively capacity (1675 mAh g⁻¹). However, commercialization faces significant challenges, such low sulfur loading, rapid degradation, poor cycling stability. At heart these issues lies limited understanding complex conversion chemistry involved in batteries. In recent years, progress has been made elucidating reaction mechanisms, thanks use both ex situ characterization techniques. Methods optical spectroscopy, time‐of‐flight secondary ion mass spectrometry, synchrotron X‐ray, neural network analysis have demonstrated great uncovering redox processes lithium polysulfides underlying significantly advancing research battery systems. This review focuses on major advancements research, particularly study electrocatalytic mechanisms using emerging We discuss aspects accurately revealing through advanced diagnostic methods, well main challenges techniques face. Finally, we explore prospects commercialization.

Language: Английский

---

Activating Transition-Metal Oxides through In Situ Regulation of Lower Hubbard Band for Catalytic Conversion of Lithium Polysulfides

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Catalytic conversion of lithium polysulfides (LiPSs) is regarded as an effective avenue to tackle the shuttle effect lithium-sulfur (Li-S) batteries, especially based upon transition-metal oxides (TMOs). However, activity origin and corresponding mechanistic insights into such catalytic systems remain elusive. Herein, activated state associated with lower Hubbard band (LHB) transition proposed elucidate TMOs by taking Mn3O4 a model electrocatalyst. Specifically, broadening LHB width, upshift position, orbital rearrangement LHB, triggered in situ substitution O atoms S LiPSs under working conditions, synergistically enable fast electron transfer modulate adsorption capability moderate level. Benefiting from these advantages, electrocatalyst converted torpid for expediting LiPS conversion. Eventually, Li-S batteries assembled deliver excellent rate performance over 6 C outstanding cycling stability 1000 cycles. Moreover, Ah-scale pouch cell constructed delivers notable energy density 388.1 W h kg-1. Our work offers promising pathway on regulation designing high-performance electrocatalysts beyond.

Language: Английский

---

Coordinatively Unsaturated Co Single-Atom Catalysts Enhance the Performance of Lithium–Sulfur Batteries by Triggering Strong d–p Orbital Hybridization

ACS Nano, Journal Year: 2024, Volume and Issue: 18(45), P. 31123 - 31134

Published: Oct. 28, 2024

The catalytic activities displayed by single-atom catalysts (SACs) depend on the coordination structure. SACs supported carbon materials often adopt saturated structures with uneven distributions because they require high-temperature conditions during synthesis. Herein, bisnitrogen-chelated Co that are coordinatively unsaturated prepared integrating a complex into conjugated microporous polymer (CMP-CoN2). Compared analogues, i.e., tetranitrogen-chelated (denoted as CMP-CoN4), CMP-CoN2 exhibits higher electrocatalytic activity in polysulfide conversions due to an enhanced hybridization between 3d orbitals of atoms and 3p S polysulfide. As result, sulfur cathodes CoN2 deliver outstanding performance metrics, including high specific capacity (1393 mA h g–1 at 0.1 C), superior rate (673.2 6 low decay (of only 0.045% per cycle 2 C over 1000 cycles). They also outperform contain CMP-CoN4 or CMPs devoid SACs. This work reveals how is affected their structures, rules underpin structure–activity relationship may be extended designing electrocatalysts for use other applications.

Language: Английский

---

Investigation on the Necessity of Low Rates Activation toward Lithium‐Sulfur Batteries

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

Published: Oct. 21, 2024

Abstract Low rate activation process is always used in conventional transition metal oxide cathode and fully activates active substances/electrolyte to achieve stable electrochemical performance. However, the related working mechanism lithium‐sulfur (Li‐ battery unclear due multiple complex chemical reaction steps including redox of sulfur dissolution polysulfides intermediate. Hence, influencing on Li‐S explored by adopting different current densities 0.05, 0.2, 1 C initial three cycles before long‐term cycling tests at 0.2 (denoted 1‐battery). 0.05‐battery presents highest capacity process, while 0.2‐battery superior performances after 150 cycles. The similar trend can be found more rates such as 0.02, 0.1, 0.5, C. Potentiostatically Li 2 S precipitation test demonstrates that rapid generation achieved higher density, 8 ‐Li n conversion accelerated according Tafel plots. interfacial physical characterizations suggest serious lithium dendrite growth will induced under high density. Therefore, considering kinetics properties, low unnecessary when lower than for battery.

Language: Английский

---