Monitoring LiNixCoyMn(1–x–y)O2 Degradation in Contact with Li via In Situ Transmission Electron Microscopy DOI
Min Liu, Qiang Li, Kaifeng Chen

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 6, 2024

High-voltage LiNixCoyMn(1–x–y)O2 (NCM) is one of the most promising cathode materials for high-energy-density lithium metal batteries. Significant efforts have been made on inhibiting surface transition NCM from ordered layered phase to low-ionic-conductivity rock salt phase, which facilitates maintaining a low interfacial impedance superior cycle performance. However, it often overlooked that also has electronic conductivity, may alleviate notorious growth dendrite-induced short-circuit. In this article, we further demonstrate effective in resisting pulverization contact with Li via situ transmission electron microscopy. The experiences rapid overlithiation Li, triggers lattice expansion and pulverization. overlithiation-induced degradation retarded Li-deficient disorder surface, attributed blocked Li+ primary path. Our work revisits unwanted layer cathodes, provides guideline interface design long-cycling high-safety

Language: Английский

Innovative advances and challenges in solid oxide electrolysis cells: Exploring surface segregation dynamics in perovskite electrodes DOI
Muhammad Bilal Hanif, Sajid Rauf, Muhammad Zubair Khan

et al.

Materials Science and Engineering R Reports, Journal Year: 2024, Volume and Issue: 161, P. 100864 - 100864

Published: Oct. 16, 2024

Language: Английский

Citations

5
Robust Concentration Gradient Co-Free Ni-Rich Cathodes Enable Long-Life and Safe Operations in High-Voltage Li-Ion Batteries DOI

Wenshuai Guo,

Zhihong Wang,

Haifeng Yu

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: 39(9), P. 4507 - 4514

Published: Feb. 22, 2025

Co-free Ni-rich cathodes are the most cost-competitive for high-energy-density Li-ion batteries (LIBs), but their commercial applications hindered by structural instability and severe interface side reactions compared to those of Co-contained cathodes. Herein, we successfully construct a concentration-gradient LiNi0.753Mn0.247O2 cathode that consists elongated radially aligned primary particles through Mo–Ti–Mg doping. The microcracks Li/Ni disorder greatly inhibited with high stability. also exhibit low diffusion energy barrier enhanced reaction kinetics. Besides, lattice oxygen loss is reduced due stronger Mo–O Ti–O bonds, further alleviating undesirable surface parasitic electrolyte. As consequence, reversible specific capacity 212.2 mA h g–1 achieved at 0.1 C maintains 94.1 even 10 C. Impressively, it displays exceptional high-voltage cycling stability retention 81.1% after 1000 cycles in pouch full cell 1 within 2.7–4.5 V, significantly accelerating development

Language: Английский

Citations

0
Correlating Self‐Discharge and Cycling Performance of Batteries to Fasten Electrolytes Development DOI Open Access

J. Zhang,

Baoyi Wang, Laisuo Su

et al.

Batteries & Supercaps, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Abstract The development of next‐generation batteries with high energy density requires the use novel electrode materials specific such as lithium metal anode, silicon high‐Ni LiNi x Mn y Co z O 2 cathode, and sulfur cathode. stability these their poor compatibility conventional electrolytes limit application, developing is one most promising strategies to tackle challenge. current electrolyte highly relies on expert knowledge expertise through a trial‐and‐error approach, which very time‐consuming. Machine learning (ML) artificial intelligence (AI) approaches have attracted attention accelerating process. However, gathering high‐quality data from experimental procedures train ML models laborious process, especially when problem statements cross over device‐level applications. Here, we find strong correlation between self‐discharge behavior lithium‐metal cycling aging performance. As measurement can be done within few days compared months for tests, finding provides strategy collect in short period that used input AI advanced batteries.

Language: Английский

Citations

0
Performance Degradation Mechanism of High-Nickel Cathode Depending on Discharge Rates and Charge Voltages during Long-Term Cycling DOI

Y HONG,

Seungki Hong,

Sang‐Ok Kim

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 13, 2025

This study investigates the degradation mechanisms of high-nickel (Ni) layered oxide (LiNi0.83Co0.11Mn0.06O2) under varying discharge C-rates at a high cut-off voltage (4.3 V) during long-term cycling. Contradictory to conventional knowledge, low rate (0.1C) results in worse cycle performance than (1C) voltage. In-depth transmission electron microscopy analysis reveals that C-rate condition, more Ni ions are reduced from +3 +2, yet structure is maintained. In contrast, C-rate, retain their valence but phase transition periodically ordered spinel occurs some portion. The prolonged dwell time forces Li layers be locally ordered, and this critically affects Therefore, underscores setting proper can significant C-rate.

Language: Английский

Citations

0
Insights into the doping functions on redox chemistry of layered Ni-rich cathodes DOI
Zhenxing Wang, Yong Chen

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 102, P. 386 - 412

Published: Nov. 17, 2024

Language: Английский

Citations

3
Monitoring LiNixCoyMn(1–x–y)O2 Degradation in Contact with Li via In Situ Transmission Electron Microscopy DOI
Min Liu, Qiang Li, Kaifeng Chen

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 6, 2024

High-voltage LiNixCoyMn(1–x–y)O2 (NCM) is one of the most promising cathode materials for high-energy-density lithium metal batteries. Significant efforts have been made on inhibiting surface transition NCM from ordered layered phase to low-ionic-conductivity rock salt phase, which facilitates maintaining a low interfacial impedance superior cycle performance. However, it often overlooked that also has electronic conductivity, may alleviate notorious growth dendrite-induced short-circuit. In this article, we further demonstrate effective in resisting pulverization contact with Li via situ transmission electron microscopy. The experiences rapid overlithiation Li, triggers lattice expansion and pulverization. overlithiation-induced degradation retarded Li-deficient disorder surface, attributed blocked Li+ primary path. Our work revisits unwanted layer cathodes, provides guideline interface design long-cycling high-safety

Language: Английский

Citations

0