Regulating the Unhybridized O 2p Orbitals of High‐Performance Li‐Rich Mn‐Based Layered Oxide Cathode by Gd‐Doping Induced Bulk Oxygen Vacancies

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(18)

Published: March 3, 2023

Abstract Li‐rich Mn‐based layered oxides (LRLOs) with ultrahigh specific capacities are promising cathode materials for high energy density lithium‐ion batteries. Nevertheless, severe irreversible oxygen release, structure degradation, capacity and voltage attenuation hinder their commercialization due to the uncontrollable redox chemistry originated from unhybridized O 2 p orbitals. Herein, a strategy generate bulk vacancies is proposed. And constructed by lowering formation of in LRLOs via Gd‐doping. The level amount states reduced partly inhibit activity. Surprisingly, not fully activated first cycle further second cycle. Moreover, activity significantly suppresses lattice volume change, layered‐to‐spinel phase transition. As result, gas release 98.80 ≈0 nmol mg −1 Superior stability 90.4% retention after 300 cycles small decay only 1.013 mV per achieved. This study provides valuable regulate orbitals designing high‐performance oxide materials.

Language: Английский

---

Perspective on powder technology for all-solid-state batteries: How to pair sulfide electrolyte with high-voltage cathode

Particuology, Journal Year: 2023, Volume and Issue: 86, P. 55 - 66

Published: April 30, 2023

Sulfide solid electrolytes (SEs) have attracted ever-increasing attention due to their superior room-temperature ionic conductivity (∼10−2 S cm−1). Additionally, the integration of sulfide SEs and high-voltage cathodes is promising achieve higher energy density. However, incompatible interfaces between been one key factors limiting applications. Therefore, this review presents a critical summarization interfacial issues in all-solid-state lithium batteries based on proposes strategies stabilize electrolyte/cathode interfaces. Moreover, future research direction application prospects powder technology sulfide-based ASSLBs were also discussed.

Language: Английский

---

Interface Engineering via Regulating Electrolyte for High‐Voltage Layered Oxide Cathodes‐Based Li‐Ion Batteries

Advanced Science, Journal Year: 2023, Volume and Issue: 10(12)

Published: Feb. 19, 2023

Li-rich and Ni-rich layered oxides as next-generation high-energy cathodes for lithium-ion batteries (LIBs) possess the catalytic surface, which leads to intensive interfacial reactions, transition metal ion dissolution, gas generation, ultimately hinders their applications at 4.7 V. Here, robust inorganic/organic/inorganic-rich architecture cathode-electrolyte interphase (CEI) inorganic/organic-rich anode-electrolyte (AEI) with F-, B-, P-rich inorganic components through modulating frontier molecular orbital energy levels of lithium salts are constructed. A ternary fluorinated electrolyte (TLE) is formulated by mixing 0.5 m difluoro(oxalato)borate, 0.2 difluorophosphate 0.3 hexafluorophosphate. The obtained effectively suppresses adverse oxidation significantly reduces chemical attacks AEI. Li1.2 Mn0.58 Ni0.08 Co0.14 O2 LiNi0.8 Co0.1 Mn0.1 in TLE exhibit high-capacity retention 83.3% after 200 cycles 1000 under V, respectively. Moreover, also shows excellent performances 45 °C, demonstrating this rich interface successfully inhibits more aggressive chemistry high voltage temperature. This work suggests that composition structure electrode can be regulated components, so ensure required performance LIBs.

Language: Английский

---

Multi-functionalized full-interface integrated engineering towards highly reversible Li-rich Mn-based cathode

Energy storage materials, Journal Year: 2024, Volume and Issue: 66, P. 103241 - 103241

Published: Feb. 1, 2024

Language: Английский

---

Advances and perspectives in understanding the structure-redox relationship of layered Li-Co-Ni-Mn oxide cathode materials

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 143, P. 101247 - 101247

Published: Feb. 9, 2024

Language: Английский

---

Interfacial-engineering-enabled high-performance Li-rich cathodes

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149546 - 149546

Published: Feb. 13, 2024

Language: Английский

---

Efficient direct repairing of lithium- and manganese-rich cathodes by concentrated solar radiation

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 23, 2024

Abstract Lithium- and manganese-rich layered oxide cathode materials have attracted extensive interest because of their high energy density. However, the rapid capacity fading serve voltage decay over cycling make waste management recycling key components indispensable. Herein, we report a facile concentrated solar radiation strategy for direct cathodes, which enables recovery effectively improves its electrochemical stability. The phase change from to spinel on particle surface metastable state structure cycled material provides precondition photocatalytic reaction thermal reconstruction during processing. inducement partial inverse is identified after treatment, strongly enhances redox activity transition metal cations oxygen anion, reversibility lattice structure. This study sheds new light reparation spent designing high-performance compositions mitigate structural degradation.

Language: Английский

---

Inhibiting lattice strain for highly stable and long-life Li-rich Mn-based layered cathodes

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Language: Английский

---

Mg2+ doping into Li sites to improve anionic redox reversibility and thermal stability of lithium-rich manganese-based oxides cathode

Materials Today Energy, Journal Year: 2022, Volume and Issue: 29, P. 101116 - 101116

Published: Aug. 14, 2022

Language: Английский

---

Research progress on the surface/interface modification of high-voltage lithium oxide cathode materials

Energy Materials, Journal Year: 2022, Volume and Issue: 2(3)

Published: Jan. 1, 2022

Lithium oxides are the most promising cathode candidates for high-performance lithium-ion batteries (LIBs), owing to their high theoretical capacity and average working voltage, which conducive achieving ultimate goal of upgrading energy density. By raising upper limit cutoff we may be able further improve both practical voltage lithium oxide cathodes. Unfortunately, high-voltage operation these cathodes results in significant challenges, namely, reduced surface structural stability interfacial with electrolytes, thus degrading electrochemical performance. Accordingly, surface/interface modification strategies, including coating, electrolyte regulation, binder design, special treatments, systematically summarized comprehensively analyzed materials this review. Furthermore, corresponding mechanisms discussed detail better grasp internal enhanced Based on recent progress, propose predictable development directions LIBs future applications. This review provides new insights into various universal strategies towards advanced next-generation power density long cycle life.

Language: Английский

---