Homeostatic Solid Solution in Layered Transition-Metal Oxide Cathodes of Sodium-Ion Batteries

Journal of the American Chemical Society, Год журнала: 2022, Номер 145(1), С. 224 - 233

Опубликована: Дек. 23, 2022

Two-phase transformation reaction is ubiquitous in solid-state electrochemistry; however, it usually involves inferior structure rearrangement upon extraction and insertion of large-sized Na+, thus leading to severe local strain, cracks, capacity decay sodium-ion batteries (SIBs). Here, a homeostatic solid solution reported the layered cathode material P'2-Na0.653Ni0.081Mn0.799Ti0.120O2 during sodiation desodiation. It induced by synergistic incorporation Ni Ti for reinforced O(2p)-Mn(3d-eg*) hybridization, which leads mitigated Jahn-Teller distortion MnO6 octahedra, contracted transition-metal oxide slabs, enlarged Na layer spacings. The thermodynamically favorable pathway rewards SIBs with excellent cycling stability (87.2% retention after 500 cycles) rate performance (100.5 mA h g-1 at 2500 g-1). demonstrated will open new avenue rational designing materials beyond.

Язык: Английский

---

Delocalized electron holes on oxygen in a battery cathode

Nature Energy, Год журнала: 2023, Номер 8(4), С. 351 - 360

Опубликована: Фев. 16, 2023

Язык: Английский

---

Oxide Cathodes: Functions, Instabilities, Self Healing, and Degradation Mitigations

Chemical Reviews, Год журнала: 2022, Номер 123(2), С. 811 - 833

Опубликована: Ноя. 18, 2022

Recent progress in high-energy-density oxide cathodes for lithium-ion batteries has pushed the limits of lithium usage and accessible redox couples. It often invokes hybrid anion- cation-redox (HACR), with exotic valence states such as oxidized oxygen ions under high voltages. Electrochemical cycling extreme conditions over an extended period can trigger various forms chemical, electrochemical, mechanical, microstructural degradations, which shorten battery life cause safety issues. Mitigation strategies require in-depth understanding underlying mechanisms. Here we offer a systematic overview functions, instabilities, peculiar materials behaviors cathodes. We note unusual anion cation mobilities caused by high-voltage charging valences. explains extensive lattice reconstructions at room temperature both good (plasticity self-healing) bad (phase change, corrosion, damage) senses, intriguing electrochemomechanical coupling. The insights are critical to self-healing phenomena ceramics (e.g., grain boundary sliding microcrack healing) novel cathode designs degradation mitigations suppressing stress-corrosion cracking constructing reactively wetted coating). Such mixed ionic-electronic conducting, electrochemically active oxides be thought almost "metalized" if voltages far from open-circuit voltage, thus differing significantly highly insulating ionic electronic transport mechanical behaviors. These characteristics should better understood exploited high-performance energy storage, electrocatalysis, other emerging applications.

Язык: Английский

---

Decoupling the roles of Ni and Co in anionic redox activity of Li-rich NMC cathodes

Nature Materials, Год журнала: 2023, Номер 22(11), С. 1370 - 1379

Опубликована: Окт. 5, 2023

Язык: Английский

---

Eutectic salt-assisted planetary centrifugal deagglomeration for single-crystalline cathode synthesis

Nature Energy, Год журнала: 2023, Номер 8(5), С. 482 - 491

Опубликована: Март 30, 2023

Язык: Английский

---

Constructing “Li-rich Ni-rich” oxide cathodes for high-energy-density Li-ion batteries

Energy & Environmental Science, Год журнала: 2023, Номер 16(3), С. 1210 - 1222

Опубликована: Янв. 1, 2023

A “Li-rich Ni-rich” cathode material design strategy was demonstrated by Li 1+ y Ni (3−5 )/3 Mo 2 /3 O as a proof of concept, showing an intergrowth layered LiNiO -rich and disordered 4 MoO 5 phases with excellent cycling stability.

Язык: Английский

---

Elucidating the Role of Prelithiation in Si‐based Anodes for Interface Stabilization

Advanced Energy Materials, Год журнала: 2023, Номер 13(28)

Опубликована: Июнь 12, 2023

Abstract Prelithiation as a facile and effective method to compensate the lithium inventory loss in initial cycle has progressed considerably both on anode cathode sides. However, much less research been devoted prelithiation effect interface stabilization for long‐term cycling of Si‐based anodes. An in‐depth quantitative analysis that forms during SiO x is presented here results are compared with prelithiaton Si Local structure probe combined detailed electrochemical reveals characteristic mosaic formed prelithiated This containing multiple silicates phases, fundamentally different from solid electrolyte (SEI) without prelithiation. The ideal conductivity mechanical properties enable improved stability With higher ratio due oxygen participation, 1.3 improves coulombic efficiency 94% full cell delivers good retention (77%) after 200 cycles. insights provided this work can be used further optimize high loading (>70% by weight) based anodes future energy density batteries.

Язык: Английский

---

Defective oxygen inert phase stabilized high-voltage nickel-rich cathode for high-energy lithium-ion batteries

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Дек. 6, 2023

Abstract Pushing layered cathode to higher operating voltage can facilitate the realization of high-energy lithium-ion batteries. However, released oxygen species initiate materials surface upon highly delithiated states will react severely with electrolyte, accelerating structure deterioration and triggering thermal degradation. Here we propose an inert phase La 2 Mo O 9 abundant vacancies (about 41%) by regulating annealing temperature engineer interface beyond conventional modifications. By employing LiNi 0.8 Co 0.1 Mn as a model system extending voltage-operated LiCoO Li-rich cathode, demonstrate that introduced lanthanum molybdenum ions transfer electrons enhance electronegativities, thus served “oxygen anchor” alleviate evolution. Furthermore, possible be operando captured reserved β-phase depositor for intrinsic high vacancy formation energy. The reaction involving electrolyte is fundamentally diminished, effectively mitigate elevate electrochemical performances, enabling 1.5-Ah pouch-type full cell exhibit negligible 6.0% capacity loss after 400 cycles.

Язык: Английский

---

Electrolyte Additives for Stable Zn Anodes

Advanced Science, Год журнала: 2023, Номер 11(4)

Опубликована: Ноя. 27, 2023

Abstract Zn‐ion batteries are regarded as the most promising for next‐generation, large‐scale energy storage because of their low cost, high safety, and eco‐friendly nature. The use aqueous electrolytes results in poor reversibility leads to many challenges related Zn anode. Electrolyte additives can effectively address such challenges, including dendrite growth corrosion. This review provides a comprehensive introduction major current strategies used anode protection. In particular, an in‐depth fundamental understanding is provided various functions electrolyte additives, electrostatic shielding, adsorption, situ solid interphase formation, enhancing water stability, surface texture regulation. Potential future research directions also discussed.

Язык: Английский

---

A Mechanistic Insight into the Oxygen Redox of Li‐Rich Layered Cathodes and their Related Electronic/Atomic Behaviors Upon Cycling

Advanced Materials, Год журнала: 2023, Номер 35(43)

Опубликована: Март 15, 2023

Abstract Li‐rich cathodes are extensively investigated as their energy density is superior to Li stoichiometric cathode materials. In addition the transition metal redox, this intriguing electrochemical performance originates from redox reaction of anionic sublattice. This new process, so‐called or, more directly, oxygen in case oxides, almost doubles compared conventional cathodes. Numerous theoretical and experimental investigations have thoroughly established current understanding However, different reports occasionally contradictory, indicating that knowledge remains incomplete. Moreover, several practical issues still hinder real‐world application As these related phenomena resulting electronic atomic evolution induced by unstable a fundamental multiscale essential for solving problem. review, mechanistic origin problems, how studies tackle summarized.

Язык: Английский

---