Toward the High‐Voltage Stability of Layered Oxide Cathodes for Sodium‐Ion Batteries: Challenges, Progress, and Perspectives

Advanced Materials, Год журнала: 2024, Номер 36(26)

Опубликована: Март 21, 2024

Sodium-ion batteries (SIBs) have garnered significant attention as ideal candidates for large-scale energy storage due to their notable advantages in terms of resource availability and cost-effectiveness. However, there remains a substantial density gap between SIBs commercially available lithium-ion (LIBs), posing challenges meeting the requirements practical applications. The fabrication high-energy cathodes has emerged an efficient approach enhancing SIBs, which commonly requires operating high-voltage regions. Layered oxide (LOCs), with low cost, facile synthesis, high theoretical specific capacity, one most promising commercial LOCs encounter when operated regions such irreversible phase transitions, migration dissolution metal cations, loss reactive oxygen, occurrence serious interfacial parasitic reactions. These issues ultimately result severe degradation battery performance. This review aims shed light on key failure mechanisms encountered by Additionally, corresponding strategies improving stability are comprehensively summarized. By providing fundamental insights valuable perspectives, this contribute advancement SIBs.

Язык: Английский

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Carbonyl Chemistry for Advanced Electrochemical Energy Storage Systems

ACS Nano, Год журнала: 2024, Номер 18(31), С. 19950 - 20000

Опубликована: Июль 29, 2024

On the basis of sustainable concept, organic compounds and carbon materials both mainly composed light C element have been regarded as powerful candidates for advanced electrochemical energy storage (EES) systems, due to theie merits low cost, eco-friendliness, renewability, structural versatility. It is investigated that carbonyl functionality most common constituent part serves a crucial role, which manifests respective different mechanisms in various aspects EES systems. Notably, systematical review about concept progress chemistry beneficial ensuring in-depth comprehending functionality. Hence, comprehensive has summarized based on state-of-the-art developments. Moreover, working principles fundamental properties unit discussed, generalized three aspects, including redox activity, interaction effect, compensation characteristic. Meanwhile, pivotal characterization technologies also illustrated purposefully studying related structure, mechanism, performance profitably understand chemistry. Finally, current challenges promising directions are concluded, aiming afford significant guidance optimal utilization moiety propel practicality

Язык: Английский

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Regulating electrode/electrolyte interfacial chemistry enables 4.6 V ultra-stable fast charging of commercial LiCoO₂

Energy & Environmental Science, Год журнала: 2024, Номер 17(9), С. 3021 - 3031

Опубликована: Янв. 1, 2024

A schematic diagram of the mechanism our fluorinated “cocktail electrolyte” stabilizing electrode/electrolyte interfaces in 4.6 V LCO batteries.

Язык: Английский

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Molecule Crowding Strategy in Polymer Electrolytes Inducing Stable Interfaces for All‐Solid‐State Lithium Batteries

Advanced Materials, Год журнала: 2024, Номер 36(31)

Опубликована: Июнь 5, 2024

All-solid-state lithium batteries with polymer electrolytes suffer from electrolyte decomposition and dendrites because of the unstable electrode/electrolyte interfaces. Herein, a molecule crowding strategy is proposed to modulate Li

Язык: Английский

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Dimethyl Sulfide Electrolyte Additive Enabled High-Voltage Lithium-Ion Battery

ACS Energy Letters, Год журнала: 2024, Номер 9(6), С. 2572 - 2581

Опубликована: Май 8, 2024

The unstable interfacial chemistry between the electrode and carbonate electrolyte greatly hinders development of high-voltage lithium-ion batteries with a Ni-rich cathode. Herein, dimethyl sulfide (DMS), simplest thioether, is successfully used as new type safe low-cost additive in conventional for batteries. electron-donating groups DMS are capable deactivating reactive superoxide radical released from cathode at high voltages inducing robust S-rich interphase, which inhibits continuous side reactions, transition metal dissolutions, lattice oxygen consumption. As result, Li||NCM811 cell delivers superior capacity retention 85% voltage 4.6 V over 300 cycles. Prolonged stable cycling 1000 cycles (75% retention) 4.4 V-level NCM811||Graphite full enabled by DMS. sulfide-based reported here provides very promising practical pathway to achieving durable lithium battery

Язык: Английский

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Directing Fluorinated Solid Electrolyte Interphase by Solubilizing Crystal Lithium Fluoride in Aprotic Electrolyte for Lithium Metal Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(16)

Опубликована: Фев. 21, 2024

Abstract Lithium fluoride (LiF) facilitates robust and fast‐ion‐transport solid electrolyte interphase (SEI) in lithium metal batteries. Fluorinated solvents/salts are ubiquitously employed to introduce LiF into SEI through electrochemical decomposition, but this approach is usually at the expense of their continuous consumption. A direct fluorinate that employs crystal limited by its poor solubility current battery formulation. Dissolving high‐dielectric‐constant solvents, like ethylene carbonate (EC) nearly neglected. Herein, feasibility directly fluorinating addition aprotic with assistance EC verified, mechanisms fluorination anti‐acidification explored. The dissolved encapsulated solvent‐/salt‐derived organic skins promote fluorinated SEI. Meanwhile, presence alters hazardous thermodynamic equilibrium, suppressing production acid species mitigate acidification degradation. Such collective benefits yield a capacity retention ratio ≈88% after 150 cycles high areal (4.5 mAh cm −2 ) Li||NCM622 cells. This facile effective contributes an in‐depth understanding formation rational design well‐performing

Язык: Английский

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Development of Electrolytes under Lean Condition in Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2024, Номер 36(29)

Опубликована: Апрель 28, 2024

Abstract Lithium–sulfur (Li–S) batteries stand out as one of the promising candidates for next‐generation electrochemical energy storage technologies. A key requirement to realize high‐specific‐energy Li–S is implement low amount electrolyte, often characterized by electrolyte/sulfur (E/S) ratio. Low E/S ratio aggravates known challenges and introduces new ones originated from high concentration polysulfides in limited electrolyte reservoir. In this review, connections between fundamental properties electrolytes electrochemical/chemical reactions under lean condition are elucidated. The emphasis on how solvating affect fate polysulfides. Built upon mechanistic analysis, different strategies design improve overall process Li anode protection discussed.

Язык: Английский

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Ether-Based High-Voltage Lithium Metal Batteries: The Road to Commercialization

ACS Nano, Год журнала: 2024, Номер 18(16), С. 10726 - 10737

Опубликована: Апрель 11, 2024

Ether-based high-voltage lithium metal batteries (HV-LMBs) are drawing growing interest due to their high compatibility with the Li anode. However, commercialization of ether-based HV-LMBs still faces many challenges, including short cycle life, limited safety, and complex failure mechanisms. In this Review, we discuss recent progress achieved in electrolytes for propose a systematic design principle electrolyte based on three important parameters: electrochemical performance, industrial scalability. Finally, summarize challenges commercial application suggest roadmap future development.

Язык: Английский

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In Situ Orthogonal Polymerization for Constructing Fast-Charging and Long-Lifespan Li Metal Batteries with Topological Copolymer Electrolytes

ACS Energy Letters, Год журнала: 2024, Номер 9(3), С. 843 - 852

Опубликована: Фев. 7, 2024

Fast-charging Li metal batteries (LMBs) with low cost, high safety, and long lifespan are highly desirable for next-generation energy storage technologies yet have been rarely achieved. Here, we report the in situ fabrication of well-designed blend, block, bottle-brush solid-state polymer electrolytes (SPEs) integrating poly(poly(ethylene glycol) methyl ether methacrylate) (PPEGMA) poly(trimethylene carbonate) (PTMC) matrices via Li-catalyzed orthogonal polymerization. Among them, topological SPEs may display quasi-molecular-scale miscibility between PPEGMA PTMC, maximize synergistic coordination Li+ carbonate units at PPEGMA/PTMC interface, simultaneously exhibit ideal mass transport properties a broad electrochemical stability window. Further incorporating trifluoroethyl methacrylate (TFEMA) into SPE allows facile construction robust solid electrolyte interphase (SEI). These, together fast charge transfer kinetics inherited from polymerization technique, enable development first example polymeric LMB capable operating steadily 3C (73% capacity retention after 1000 cycles).

Язык: Английский

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Tailoring the Electrode‐Electrolyte Interface for Reliable Operation of All‐Climate 4.8 V Li||NCM811 Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(44)

Опубликована: Авг. 6, 2024

Abstract Combining high‐voltage nickel‐rich cathodes with lithium metal anodes is among the most promising approaches for achieving high‐energy‐density batteries. However, current electrolytes fail to simultaneously satisfy compatibility requirements anode and tolerance ultra‐high voltage NCM811 cathode. Here, we have designed an ultra‐oxidation‐resistant electrolyte by meticulously adjusting composition of fluorinated carbonates. Our study reveals that a solid‐electrolyte interphase (SEI) rich in LiF Li 2 O constructed on through synergistic decomposition solvents PF 6 − anion, facilitating smooth deposition. The superior oxidation resistance our enables Li||NCM811 cell deliver capacity retention 80 % after 300 cycles at ultrahigh cut–off 4.8 V. Additionally, pioneering V‐class pouch energy density 462.2 Wh kg −1 stably 110 under harsh conditions high cathode loading (30 mg cm −2 ), low N/P ratio (1.18), lean (2.3 g Ah ).

Язык: Английский

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