Chemical Science, Год журнала: 2024, Номер unknown
Опубликована: Дек. 2, 2024
While lithium-oxygen batteries have a high theoretical specific energy, the practical discharge capacity is much lower due to passivation of solid product, Li
Язык: Английский
Advanced Materials, Год журнала: 2024, Номер 36(32)
Опубликована: Май 27, 2024
Abstract Light‐assisted Li‐O 2 batteries exhibit a high round‐trip efficiency attributable to the assistance of light‐generated electrons and holes in oxygen reduction evolution reactions. Nonetheless, excitonic effect arising from Coulomb interaction between impedes carrier separation, thus hindering efficient utilization photo‐energy. Herein, porphyrinic metal‐organic frameworks with (Fe Ni)O(COO) 6 clusters are used as photocathodes accelerate exciton dissociation into charge carriers for light‐assisted batteries. The coupling Ni 3d Fe orbitals boosts ligand‐to‐metal cluster transfer, hence drives activates O superoxide ( • − ) radicals, rather than singlet 1 under photoexcitation. These enable low total overvoltage 0.28 V 92% light irradiation 100 mW cm −2 . This work highlights photoelectrochemical processes provides insights photocathode design
Язык: Английский
Процитировано
18
Energy & Fuels, Год журнала: 2024, Номер 38(11), С. 10324 - 10332
Опубликована: Май 24, 2024
The lithium carbon dioxide (Li-CO2) battery is regarded as an attractive electrochemical energy storage system on account of its high density (∼1876 Wh kg–1) and utilization "greenhouse gas" CO2. main discharge product carbonate (Li2CO3) decomposed along with the inevitable formation superoxide radicals (O2•–), it results in irreversible side reactions, such deterioration electrolytes oxidation cathode, which lead to unfavorable cycle life. Herein, sodium lignosulfonate (LSS) introduced a radical capture agent reduce reactivity generated O2•– Li-CO2 battery. Combined adsorption calculation, found that can be preferentially adsorbed LSS. It favors suppression reactions between cathode/electrolyte during charge. discharge/charge voltage gap significantly reduced by 0.23 V long lifespan over 200 cycles. This investigation demonstrates manipulation essential construct stable efficient
Язык: Английский
Процитировано
7
Energy & Fuels, Год журнала: 2024, Номер 38(14), С. 12472 - 12486
Опубликована: Июнь 29, 2024
Sodium-ion batteries (SIBs) are expected to become attractive large-scale energy storage technologies owing their abundant resources and low cost. However, sluggish reaction kinetics at the interface poor thermodynamic stability of organic electrolytes lead inferior cycle/rate performance a density SIBs. The electrolyte engineering, including salt concentration adjustment, molecule design, additive utilization, has been demonstrated effectively optimize solvation structures construct stable interfaces, resulting in accelerated Na+ transport suppressed decomposition. This review focuses on recent advances fundamental design principles terms sodium salts, solvents, functional additives. Furthermore, crucial challenges for SIBs, high operating voltage, wide working temperature range, fast charge rate, discussed. corresponding solution strategies introduced desired high-performance Finally, several perspectives future development presented practical
Язык: Английский
Процитировано
6
Energy & Fuels, Год журнала: 2024, Номер unknown
Опубликована: Сен. 29, 2024
Язык: Английский
Процитировано
5
Journal of the American Chemical Society, Год журнала: 2024, Номер unknown
Опубликована: Сен. 11, 2024
Li-O
Язык: Английский
Процитировано
5
Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(12), С. 3538 - 3547
Опубликована: Янв. 1, 2024
Li–O 2 batteries have attracted much attention due to its ultra-high theoretical energy density; however, an overpotential of large charging/discharging limits development.
Язык: Английский
Процитировано
4
Nanoscale, Год журнала: 2024, Номер 16(37), С. 17324 - 17337
Опубликована: Янв. 1, 2024
Reaction mechanisms of CO 2 reduction and evolution at cathode/electrolyte interface are discussed, highlighting the relationship between electrochemical performance Li–CO batteries properties different discharge products.
Язык: Английский
Процитировано
4
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Март 19, 2025
Li-O2 batteries have aroused considerable interest due to high theoretical energy density; however, the singlet oxygen (1O2) generated in both discharge and charge processes induces severe parasitic reactions leads their low round-trip efficiency poor rechargeability. Herein, a universal heavy atom-induced quenching mechanism is proposed suppress 1O2 related side reactions. Br tris(4-bromophenyl)amine (TBPA) strong spin-orbit coupling (SOC), enhancing interaction between spin angular momentum orbital of electron. It enables TBPA capture electrophilic form complex then effectively drives spin-forbidden spin-flip process triplet complex. This accelerates conversion ground-state 3O2 through intersystem crossing mechanism, it efficiently eliminates its attack on organic solvents carbon cathodes. These endow battery with reduced overvoltages prolonged lifespan for over 350 cycles when coupled RuO2 catalyst. work highlights SOC quench evolution reaction-related devices.
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Март 20, 2025
Lithium–oxygen (Li–O2) batteries have high theoretical energy density, but the discharge product Li2O2 of Li–O2 is difficult to decompose, resulting in undesirably charging potential. The use soluble redox mediators (RMs) can usually reduce potential batteries, RM on cathode side diffuse Li metal anode and react with it, leading continuous loss causing damage fragile interface. So, it necessary develop a bifunctional mediator (BRM) that simultaneously protect anode. Herein, we introduced 4-bromomethyl-phenylboronic acid (BPLA) as BRM. Br– ions be dissociated from BPLA during cycling serve an effective component RM, thereby significantly facilitating reduction batteries. Meanwhile, boronic groups capability engage cross-linking reactions Li-metal surface, forming flexible solid-electrolyte interphase (SEI) layer. More importantly, SEI layer contains reversible dynamic B–O covalent bond, which possesses characteristic dissociation rearrangement. Thereby shape adaptability, inhibits growth dendrites, suppresses reaction between Li. Consequently, our BPLA, serving BRM, enable achieve stable cycle life 180 cycles under low charge up 4.0 V.
Язык: Английский
Процитировано
0
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 1, 2025
Abstract Li–O 2 batteries (LOBs), which possess immense theoretical energy densities, have been widely recognized as a promising technology to revolutionize electrochemical storage. However, the severe overpotential induced by sluggish redox reaction kinetics significantly hinders their practical application. To address this challenge, photocathodes incorporated into LOBs, leveraging photovoltage compensate for charging voltages and achieve ultralow overpotential. Nevertheless, comprehensive review of photocathode in LOBs is still lacking. This timely aims introduce pivotal role photo‐assisted strategy provides an updated overview utilized LOBs. After demonstrating mechanisms reaction, research progress application various comprehensively reviewed. Special emphasis placed on critical correlation between material design key challenges including reduced potential/improved discharging potential, alleviated electrolyte decomposition, suppressed photogenerated carrier recombination, broadened spectral response ranges, decoupled mass transport electron transfer, modulated charge/discharge mechanisms. Finally, future directions development systems are The current important insight cathode state‐of‐the‐art favorable high‐performance
Язык: Английский
Процитировано
0