Delineating the Impact of Transition‐Metal Crossover on Solid‐Electrolyte Interphase Formation with Ion Mass Spectrometry DOI

Richard Sim,

Laisuo Su, Andrei Dolocan

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(14)

Published: Dec. 25, 2023

Lithium-metal batteries (LMB) employing cobalt-free layered-oxide cathodes are a sustainable path forward to achieving high energy densities, but these exhibit substantial transition-metal dissolution during high-voltage cycling. While crossover is recognized disrupt solid-electrolyte interphase (SEI) formation on graphite anodes, experimental evidence necessary demonstrate this for lithium-metal anodes. In work, advanced high-resolution 3D chemical analysis conducted with time-of-flight secondary-ion mass spectrometry (TOF-SIMS) establish spatial correlations between the transition metals and electrolyte decomposition products found cycled Insights into localization of various chemistries linked crucial processes that define LMB performance, such as lithium deposition, SEI growth, deposition deduced from precise elemental SEI. Heterogenous perpetuate both heterogeneous growth These confirmed across anodes different electrolytes. An stable higher voltages shown minimize its effects Overall, results highlight importance maintaining uniform coverage which disrupted by operation at voltages.

Language: Английский

Promoting Reversibility of Co‐Free Layered Cathodes by Al and Cation Vacancy DOI
Tongshuai Wang,

Jia Yang,

Hailong Wang

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(12)

Published: Feb. 9, 2023

Abstract Li‐ion batteries adopting layered cathodes can effectively alleviate the range limitations of electric vehicles. Unfortunately scarcity Co inhibits massive deployment cathodes. Eliminating from is necessary to make a breakthrough in global application However, Co‐free face challenges delithiation/lithiation reversibility since plays pivotal role suppressing Li/Ni mixing. Many metals have been proposed replace cathodes, and sophisticated compositional designs always consider mixing as top priority. Here, authors show that be suppressed by Al cation vacancies different manners; however, irreversible capacities are prominently given similar In‐situ X‐ray diffraction monitored potentiostatic‐intermittent‐titration measurements reveal decreases lattice strain between H2 H3 phase 13.6%, but has an adverse impact on structure reversibility. While together not only significantly reduce H2/H3 78% also greatly enhance Furthermore, first‐principles calculation shows remarkably Li migration energy barrier order magnitude. Reversibility newly designed cathode enhanced through synergic effect vacancies.

Language: Английский

Citations

42
A universal multifunctional rare earth oxide coating to stabilize high-voltage lithium layered oxide cathodes DOI

Yabin Shen,

Xiuyun Zhang,

Licheng Wang

et al.

Energy storage materials, Journal Year: 2023, Volume and Issue: 56, P. 155 - 164

Published: Jan. 12, 2023

Language: Английский

Citations

40
Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries DOI Creative Commons
Hao Ge,

Zhiwen Shen,

Yanhong Wang

et al.

SusMat, Journal Year: 2023, Volume and Issue: 4(1), P. 48 - 71

Published: Dec. 26, 2023

Abstract Great attention has been given to high‐performance and inexpensive lithium‐ion batteries (LIBs) in response the ever‐increasing demand for explosive growth of electric vehicles (EVs). High‐performance low‐cost Co‐free Ni‐rich layered cathodes are considered one most favorable candidates next‐generation LIBs because current supply chain EVs relies heavily on scarce expensive Co. Herein, we review recent research progress cathodes, emphasizing analyzing necessity replacing Co popular improvment methods. The advancements design strategies summarized detail. Despite considerable improvements achieved so far, main technical challenges contributing deterioration such as detrimental phase transitions, crack formation, severe interfacial side reactions, difficult resolve by a single technique. cooperation multiple modification is expected accelerate industrialization corresponding synergistic mechanisms urgently need be studied. More effects will aroused explore promote sustainable development LIBs.

Language: Английский

Citations

40
Chemomechanically Stable Small Single‐crystal Mo‐doped LiNi0.6Co0.2Mn0.2O2 Cathodes for Practical 4.5 V‐class Pouch‐type Li‐ion Batteries DOI
Longwei Liang, Xiaoying Li,

Maoshui Su

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(11)

Published: Jan. 19, 2023

High voltage can cost-effectively boost energy density of Ni-rich cathodes based Li-ion batteries (LIBs), but compromises their mechanical, electrochemical and thermal-driven stability. Herein, a collaborative strategy (i.e., small single-crystal design hetero-atom doping) is devised to construct chemomechanically reliable Mo-doped LiNi0.6 Co0.2 Mn0.2 O2 (SS-MN6) operating stably under high (≥4.5 V vs. Li/Li+ ). The substantially reduced particle size combined with Mo6+ doping absorbs accumulated localized stress eradicate cracks formation, subdues the surface side reactions lattice oxygen missing meanwhile, improves thermal tolerance at highly delithiated state. Consequently, SS-MN6 pouch cells are endowed striking deep cycling stability wide-temperature-tolerance capability. contribution here provides promising way advanced superb chemomechanical for next-generation LIBs.

Language: Английский

Citations

39
Delineating the Impact of Transition‐Metal Crossover on Solid‐Electrolyte Interphase Formation with Ion Mass Spectrometry DOI

Richard Sim,

Laisuo Su, Andrei Dolocan

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(14)

Published: Dec. 25, 2023

Lithium-metal batteries (LMB) employing cobalt-free layered-oxide cathodes are a sustainable path forward to achieving high energy densities, but these exhibit substantial transition-metal dissolution during high-voltage cycling. While crossover is recognized disrupt solid-electrolyte interphase (SEI) formation on graphite anodes, experimental evidence necessary demonstrate this for lithium-metal anodes. In work, advanced high-resolution 3D chemical analysis conducted with time-of-flight secondary-ion mass spectrometry (TOF-SIMS) establish spatial correlations between the transition metals and electrolyte decomposition products found cycled Insights into localization of various chemistries linked crucial processes that define LMB performance, such as lithium deposition, SEI growth, deposition deduced from precise elemental SEI. Heterogenous perpetuate both heterogeneous growth These confirmed across anodes different electrolytes. An stable higher voltages shown minimize its effects Overall, results highlight importance maintaining uniform coverage which disrupted by operation at voltages.

Language: Английский

Citations

35