A5046843132- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Magnetic Properties and Synthesis of Ferrites
Wuhan University of Technology
2021-2024
Abstract Lithium‐ion batteries (LIBs) are currently widely applied in many aspects of life, but with the development, capacity lithium‐ion can no longer meet needs. One dominant factors to restricting LIBs is cathode materials. Among derivatives spinel LiMn 2 O 4 (LMO), LiNi 0.5 Mn 1.5 (LNMO) has become one research promising materials current due its high working voltage (4.7 V) and large theoretical specific (147 mAh g −1 ). However, short cycle life LNMO during electrochemical process...
To supress Li/Ni mixing, the strategy of surface modification and Co doping is proposed. Doping trace can suppress mixing in bulk phase cathode particles, while rock-salt shell a originally containing large amount mixed rows be transformed into cation-ordered spinel layered on inside by means engineering. Simultaneously, as coating layer, Li2MoO4 nanolayer forms surface. With improved Li-ion diffusion, certain inhibitory effects voltage attenuation capacity loss are found. It shows that with...
Stacking faults, as common native crystallographic planar defects, have a significant negative impact on lithium (Li) ion diffision in layered oxide cathode materials, which must be considered to design and construct high-performance Li-ion batteries. Herein, we disclose that the stacking fault is one of important factors contributing sluggish diffusion kinetics Li-rich oxides (LLOs). Multidimensional multiscale structural analyses, combined with theoretical calculations, reveal LLOs...
Due to the higher energy density, high thermal stability, and low cost, LiNi0.5Mn1.5O4 (LNMO) spinel, with a large voltage operating window, has been one of most promising cathode materials for lithium-ion batteries (LIBs). However, interfacial reaction between electrolyte two-phase within bulk LNMO would destroy original structure lead capacity deterioration, posing significant challenge. Therefore, way suppress transition-metal (TM) dissolution in attracted much attention....