A5061511513- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Magnetic Properties and Synthesis of Ferrites
- Ferroelectric and Piezoelectric Materials
- Nanomaterials for catalytic reactions
- Transition Metal Oxide Nanomaterials
- Recycling and Waste Management Techniques
- MXene and MAX Phase Materials
- Layered Double Hydroxides Synthesis and Applications
- Electric Vehicles and Infrastructure
Karlsruhe Institute of Technology
2016-2023
Helmholtz-Institute Ulm
2019-2021
Abstract Deciphering the sophisticated interplay between thermodynamics and kinetics of high‐temperature lithiation reaction is fundamentally significant for designing preparing cathode materials. Here, formation pathway Ni‐rich layered ordered LiNi 0.6 Co 0.2 Mn O 2 (O‐LNCM622O) carefully characterized using in situ synchrotron radiation diffraction. A fast nonequilibrium phase transition from reactants to a metastable disordered Li 1− x (Ni ) 1+ (D‐LNCM622O, 0 < 0.95) takes place while...
LiNixCoyMn1-x-yO2 (NCM) intercalation compounds with core-shell architecture have been found to be promising cathode candidates for next-generation lithium-ion battery applications. The NCM cathodes' functional properties are dependent on the transition metal relative ratios, making it a challenge control real structure of materials and understand synergistic effect core shell during electrochemical cycling. Herein, universal facile synthetic strategy is developed synthesize material...
Abstract One of the major challenges facing application layered LiNiO 2 (LNO) cathode materials is oxygen release upon electrochemical cycling. Here it shown that tailoring provided lithium content during synthesis process can create a disordered Li 1‐ x Ni 1+ O phase at primary particle surface. The surface, which serves as self‐protective layer to alleviate loss, possesses same rhombohedral structure ( R m ) inner core particles ≈ 0). With advanced synchrotron‐based x‐ray 3D imaging and...
Abstract LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising cathode in lithium‐ion batteries (LIBs) due to its high operating voltage and open Li + diffusion framework. However, the instability of electrode–electrolyte interface negative environmental impact electrode fabrication processes limit practical application. Therefore, switching processing conditions aqueous understanding accompanying surface structural evolution are imperative. Here, water‐treated, poly(acrylic acid) (PAA)‐treated, H 3 PO...
Commercially available 18650 Li-ion batteries are considered for high-energy-density storage and usage in mobile applications as well to store energy from intermittent sources. This has triggered intense research suitable electrode electrolyte materials, while their current state-of-the-art, temperature-dependent performance is hardly described detail. The fatigue process two brands of rechargeable commercial high-energy (18650-type, 3500 mAh LiNi0.83Mn0.07Co0.11O2 (NMC-811)...
Normally, high temperatures are required for solid-state reactions to overcome energy barriers in the formation of lithium insertion materials. Consequently, conventional high-temperature lithiation very time- and energy-consuming often accompanied by undesirable side reactions. Thus, how synthesize Li-containing cathode materials with a desired structure under short reaction time low temperature is paramount significance. Herein, layered sodium-deficient Na2/3□1/3(Ni0.25Mn0.75)O2 (□...
Lithium- and manganese-rich transition-metal oxide (LMR-NMC) electrodes have been designed either as heterostructures of the primary components ("composite") or core-shell structures with improved electrochemistry reported for both configurations when compared their components. A detailed electrochemical structural investigation 0.5Li2MnO3-0.5LiNi0.5Mn0.3Co0.2O2 composite structured positive electrode materials is reported. The material shows better overall performance to its corresponding...
The suitability of multication doping to stabilize the disordered Fd3̅m structure in a spinel is reported here. In this work, LiNi0.3Cu0.1Fe0.2Mn1.4O4 was synthesized via sol–gel route at calcination temperature 850 °C. evaluated as positive electrode material voltage range between 3.5 and 5.3 V (vs Li+/Li) with an initial specific discharge capacity 126 mAh g–1 rate C/2. This shows good cycling stability retention 89% after 200 cycles excellent capability reaching 78 20C. operando X-ray...
Abstract Pure Li 0.8 M 0.1 Ti 2 (PO 4 ) 3 (M: Co, Mg) phosphates with the NASICON‐type structure were synthesized using a solid‐state reaction. Depending on cation, M, synthesis temperature and annealing duration optimized. The electrochemical performances of evaluated as negative electrode materials for Li‐ion batteries over two different voltage ranges, 1.5–3.0 V 1.0–3.0 V. best results obtained range discharge capacities 100 mAh g −1 80 Co Mg , respectively, 20 cycles capacity retentions...
In article number 2009949, Weibo Hua, Sylvio Indris, Laijun Liu, and co-workers study the formation pathway of layered ordered LiNi0.6Co0.2Mn0.2O2 (O-LNCM622O) from a mixture precursor, Ni0.6Co0.2Mn0.2(OH)2 or Ni0.6Co0.2Mn0.2CO3, together with LiOH·H2O using in situ high-temperature synchrotron radiation diffraction. A first-order disorder-to-order transition disordered Li1−x(Ni0.6Co0.2Mn0.2)1+xO2 (D-LNCM622O) to O-LNCM622O, crystal growth kinetics during synthesis O-LNCM622O are unraveled.