Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112646 - 112646
Published: April 1, 2025
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(5)
Published: Dec. 13, 2023
Abstract Compensating the irreversible loss of limited active lithium (Li) is essentially important for improving energy‐density and cycle‐life practical Li‐ion battery full‐cell, especially after employing high‐capacity but low initial coulombic efficiency anode candidates. Introducing prelithiation agent can provide additional Li source such compensation. Herein, we precisely implant trace Co (extracted from transition metal oxide) into site 2 O, obtaining (Li 0.66 0.11 □ 0.23 ) O (CLO) cathode agent. The synergistic formation vacancies Co‐derived catalysis efficiently enhance inherent conductivity weaken Li−O interaction which facilitates its anionic oxidation to peroxo/superoxo species gaseous , achieving 1642.7 mAh/g ~Li2O capacity (≈980 agent). Coupled 6.5 wt % CLO‐based with LiCoO cathode, substantial stored within CLO released compensate consumption on SiO/C anode, 270 Wh/kg pouch‐type full‐cell 92 retention 1000 cycles.
Language: Английский
Citations
20
Energy storage materials, Journal Year: 2023, Volume and Issue: 65, P. 103161 - 103161
Published: Dec. 24, 2023
Language: Английский
Citations
19
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(42)
Published: July 23, 2024
Abstract Sodium‐ion batteries (SIBs) as a promising technology for large‐scale energy storage have received unprecedented attention. However, the cathodes in SIBs generally suffer from detrimental cathode‐electrolyte interfacial side reactions and structural degradation during cycling, which leads to severe capacity fade voltage decay. Here, we developed an ultra‐stable Na 0.72 Ni 0.20 Co 0.21 Mn 0.55 Mg 0.036 O 2 (NCM‐CS‐GMg) cathode material Mg‐free core is encapsulated by shell with gradient distribution of using coprecipitation method Mg‐hysteretic cascade feedstock followed calcination. From interior outer surface shell, content electrochemically inactive gradually increases, + deintercalation amount decreases after charged. Benefiting this desodiation, transition metal (TM) ion migration TM layers effectively inhibited, thus suppressing layered‐to‐rock‐salt phase resultant microcracks. Besides, less formation high‐valence ions on contributes stable interface. The as‐prepared NCM‐CS‐GMg exhibits remarkable cycling life over 3000 cycles negligible drop (0.127 mV per cycle). Our findings highlight effective way developing sustainable materials without compromising initial specific SIBs.
Language: Английский
Citations
8
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 17, 2024
Sodium-ion batteries suffer from kinetic problems stemming sluggish ion transport across the electrode-electrolyte interface, causing rapid energy decay during fast-charging or low-temperature operation. One exciting prospect to enhance kinetics is constructing neuron-like electrodes that emulate fast signal transmission in a nervous system. It has been considered these bioinspired designs electron/ion of through carbon networks. However, whether they can avoid charge transfer at interface remains unknown. By connecting openings nanotubes with surface carbon-coated Na
Language: Английский
Citations
6
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 24, 2024
Abstract Low‐temperature synthesis of polyanionic cathodes for sodium‐ion batteries is highly desirable but often plagued by prolonged reaction times and suboptimal crystallinity. To address these challenges, a novel self‐adaptive coordination field regulation (SACFR) strategy based on dynamic lock‐and‐release (DLR) mechanism introduced. Specifically, urea used as DLR carrier during synthesis, which dynamically “locks” “releases” vanadium ions controlled release, simultaneously “locking” H + to enhance phosphate group thereby creating that can intelligently respond real‐time demands the system. This behavior contributes both an improvement in kinetics significant reduction Gibbs free energy change ( ΔG ). As result, kinetic efficiency thermodynamic spontaneity are greatly enhanced, enabling efficient high‐crystalline Na 3 V 2 O (PO 4 ) F (NVOPF) at 90 °C within just hours. The as‐prepared NVOPF cathode exhibits exceptional rate performance ultra‐stable cycling stability across broad temperature range. Furthermore, successful kilogram‐scale underscores practical potential innovative strategy. work pioneers chemistry providing transformative insights into material design.
Language: Английский
Citations
6
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 16, 2024
Abstract Layered oxides with active oxygen redox are attractive cathode materials for sodium‐ion batteries (SIBs) due to high capacity but suffer from rapid capacity/voltage deterioration and sluggish reaction kinetics stemming lattice release, interfacial side reactions, structural reconstruction. Herein, a synergistic strategy of crystal‐facet modulation fluorinated engineering is proposed achieve capacity, superior rate capability, long cycle stability in Na 0.67 Li 0.24 Mn 0.76 O 2 . The synthesized single‐crystal (NLMO{010}) featuring increased {010} facet exposure exhibits faster anionic delivers (272.4 mAh g −1 at 10 mA ) energy density (713.9 Wh kg performance (116.4 1 A ). Moreover, by incorporating N‐Fluorobenzenesulfonimide (NFBS) as electrolyte additive, the NLMO{010} retains 84.6% after 400 cycles 500 alleviated voltage fade (0.27 mV per cycle). Combined situ analysis theoretical calculations unveil dual functionality NFBS, which results thin yet durable interfaces on hard carbon anode scavenges highly reactive species. indicate importance fast‐ion‐transfer formulation enhance redox‐active high‐energy‐density SIBs.
Language: Английский
Citations
6
Advanced Materials, Journal Year: 2023, Volume and Issue: 36(13)
Published: Dec. 20, 2023
Abstract Developing sacrificial cathode prelithiation technology to compensate for active lithium loss is vital improving the energy density of lithium‐ion battery full‐cells. Li 2 CO 3 owns high theoretical specific capacity, superior air stability, but poor conductivity as an insulator, acting a promising challenging agent candidate. Herein, extracting trace amount Co from LiCoO (LCO), lattice engineering developed through substituting sites with and inducing defects obtain composite structure consisting (Li 0.906 0.043 ▫ 0.051 ) 2.934 ball milled (Co‐Li @LCO). Notably, both bandgap ─ O bond strength have essentially declined in this structure. Benefiting synergistic effect bulk phase catalytic regulation Co, potential deep decomposition significantly decreases typical >4.7 ≈4.25 V versus Li/Li + , presenting >600 mAh g −1 compensation capacity. Impressively, coupling 5 wt% Co‐Li @LCO within NCM‐811 cathode, 235 Wh kg pouch‐type full‐cell achieved, performing 88% capacity retention after 1000 cycles.
Language: Английский
Citations
16
Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Language: Английский
Citations
5
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(26), P. 33539 - 33547
Published: June 24, 2024
The irreversible oxygen-redox reactions in the high-voltage region of sodium-layered cathode materials lead to poor capacity retention and structural instability during cycling, presenting a significant challenge development high-energy-density sodium-ion batteries. This work introduces high-entropy design for layered Na0.67Li0.1Co0.1Cu0.1Ni0.1Ti0.1Mn0.5O2 (Mn-HEO) with self-regulating mechanism extend specific energy density. oxygen redox reaction was activated initial charging process, accompanied by self-regulation active elements, enhancing ionic bonds form vacancy wall near TM vacancies thus preventing migration transition metal elements. Systematic situ/ex situ characterizations theoretical calculations comprehensively support understanding Mn-HEO. As result, Mn-HEO exhibits stable structure cycling. It demonstrates almost zero strain within wide voltage range 2.0-4.5 V remarkable (177 mAh g-1 at 0.05 C) excellent long-term cycling stability (87.6% after 200 cycles 2 C). opens new pathway chemistry revealing crystal evolution oxides.
Language: Английский
Citations
4
Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 26, 2025
Abstract Sodium‐ion batteries are applied to cold‐resistant energy storage hindered by phase transitions and sluggish Na + migration of traditional carbonate‐based electrolytes at low temperatures. The desolvation is a crucial step in impeding the transport , which primarily attributes robust solvent coordination . Herein, low‐temperature adaptive electrolyte with an ultraweakly coordinated 1,3‐dioxolane (DOL) designed for constructing anion‐rich solvation structure diglyme (G2)‐based electrolyte. electronegativity oxygen atoms G2 attenuated dipole‐dipole interaction between DOL G2. As temperature drops, weakened ‒O (G2) leads increased anionic less coordination, facilitating This anionic‐enhanced contributes formation stable solid interface hard carbon (HC) anode, accelerates diminishing voltage polarization Consequently, HC anode can retain high capacity 203.9 mAh g ‒1 (1 C) ‒50 °C, pouch cell composed HC||Na 3 V 2 (PO 4 ) ‒30 °C achieves retention 92.43% after 100 cycles 0.1 C. strategy guides design ultra‐low broadens range applications sodium‐ion batteries.
Language: Английский
Citations
0