Advances in performance degradation mechanism and safety assessment of LiFePOfor energy storage.

In the context of 'energy shortage', developing a novel energy-based power system is essential for advancing the current power system towards low-carbon solutions. As the usage duration of lithium-ion batteries for energy storage increases, the nonlinear changes in their aging process pose challenges to accurately assess their performance. This paper focuses on the study LiFeO(LFP), used for energy storage, and explores their performance degradation mechanisms.

Design of Nb-doped high-nickel layered ternary cathode material and its structure stability.

LiNiCoMnO(NCM811) is one of the most promising cathode materials for high-energy lithium-ion batteries, but there are still problems such as rapid capacity decay during charge and discharge and poor cycle performance. Elemental doping can significantly improve the electrochemical performance of high nickel ternary cathode materials. In this work, Nb-doped NCM811 cathode material was successfully synthesized.

Na and Cl co-doping modified LiNiCoMnOas cathode for lithium-ion battery.

In recent years, ternary nickel-rich layered oxides have gradually replaced traditional binary cathode materials in the lithium-ion battery market due to their advantages of high energy density and environmental protection. However, their structural instability of cathode materials has seriously affected the cycle performance of the battery. In order to optimize the internal structure of LiNiCoMnO(NCM523), the modified LiNiCoMnOwas prepared bydoping Na and Cl wet grinding solid phase method.

Ti-substituted O3-type layered oxide cathode material with high-voltage stability for sodium-ion batteries.

O3-type layered transition metal oxides (NaTMO) have attracted extensive attention as a promising cathode material for sodium-ion batteries because of their high capacity. However, the irreversible phase transition especially cycled under high voltage remains a concerning challenge for NaTMO. Herein, a Ti-substituted NaNiCoMnO cathode with strongly suppressed phase transition and enhanced storage stability is investigated.

Role of Residual Li and Oxygen Vacancies in Ni-rich Cathode Materials.

Residual Li and oxygen vacancies in Ni-rich cathode materials have a great influence on electrochemical performance, yet their role is still poorly understood. Herein, by simply adjusting the oxygen flow during the high-temperature sintering process, some LiO can be carried into the exhaust gas and the contents of residual Li and oxygen vacancies in LiNiCoMnO cathodes can be accurately controlled. Residual Li reduces the surficial Li diffusion coefficient, thereby limiting the rate property of the cathode.

Research Progress on the Surface of High-Nickel Nickel-Cobalt-Manganese Ternary Cathode Materials: A Mini Review.

To address increasingly prominent energy problems, lithium-ion batteries have been widely developed. The high-nickel type nickel-cobalt-manganese (NCM) ternary cathode material has attracted attention because of its high energy density, but it has problems such as cation mixing. To address these issues, it is necessary to start from the surface and interface of the cathode material, explore the mechanism underlying the material's structural change and the occurrence of side reactions, and propose corresponding optimization schemes.

Sn-Doping and LiSnO Nano-Coating Layer Co-Modified LiNiCoMnO with Improved Cycle Stability at 4.6 V Cut-off Voltage.

Nickel-rich layered LiNiCoMnO (LiMO) is widely investigated as a promising cathode material for advanced lithium-ion batteries used in electric vehicles, and a much higher energy density in higher cut-off voltage is emergent for long driving range. However, during extensive cycling when charged to higher voltage, the battery exhibits severe capacity fading and obvious structural collapse, which leads to poor cycle stability. Herein, Sn-doping and in situ formed LiSnO nano-coating layer co-modified spherical-like LiNiCoMnO samples were successfully prepared using a facile molten salt method and demonstrated excellent cyclic properties and high-rate capabilities.

Energy Storage and Thermostability of LiVO-Coated LiNiCoMnO as Cathode Materials for Lithium Ion Batteries.

The electrochemical performances and thermostability of LiNi8CoMnO is affected by temperature. High ambient temperature or irregular heat distribution accelerates the decline of LiNiCoMnO performance, shortens cathode material life. In this work, the energy storage and thermostability of the LiVO-coated LiNiCoMnO cathode material were studied for the first time by electrochemical calorimetry methode at different temperatures and rates.

Simple and rapid mercury ion selective electrode based on 1-undecanethiol assembled Au substrate and its recognition mechanism.

A simple and rapid mercury ion selective electrode based on 1-undecanethiol (1-UDT) assembled Au substrate (Au/1-UDT) has been well constructed. 1-UDT was for the purpose of generating self-assembled monolayer on gold surface to recognize Hg in aqueous solution, which had a working concentration range of 1.0×10-1.

Alleviating Surface Degradation of Nickel-Rich Layered Oxide Cathode Material by Encapsulating with Nanoscale Li-Ions/Electrons Superionic Conductors Hybrid Membrane for Advanced Li-Ion Batteries.

Nickel-rich layered oxide cathode materials for advanced lithium-ion batteries have received much attention recently because of their high specific capacities and significant reduction of cost. However, these cathodes are facing a fundamental challenge of loss in performance as a result of surface lithium residue, side reactions with the electrolyte and structure rearrangement upon long-term cycling. Herein, by capturing the lithium residue on the surface of LiNiCoMnO (NCM) cathode material as Li source, we propose a hybrid coating strategy incorporating lithium ions conductor LiAlO with superconductor LiTiO to overcome those obstinate issues.