A5023639733- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Building Energy and Comfort Optimization
- Photovoltaic System Optimization Techniques
- Electric Vehicles and Infrastructure
- Concrete Corrosion and Durability
- Semiconductor materials and interfaces
- Corrosion Behavior and Inhibition
- Concrete and Cement Materials Research
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Smart Grid Energy Management
- Global Energy and Sustainability Research
KTH Royal Institute of Technology
2018-2022
Delft University of Technology
2013
This study investigates the benefits of introducing Li-ion batteries as energy storage unit in commercial sector by considering a representative building with photovoltaic system. Only costs and revenues related to installation operation battery are considered this study. The operational strategy consists balancing following processes through day-ahead forecasts for both electricity consumption production: shaving targeted peak, performing price arbitrage, increasing self-consumption. By...
Predicting the performance of Li-ion batteries over lifetime is necessary for design and optimal operation integrated energy systems, as electric vehicles grids. For prediction purposes, several models have been suggested in literature, with different levels complexity predictability. In particular, electrochemical suffer high computational costs, while empirical are deprived physical meaning. present work, a semi-empirical model suggested, holding efficiency approaches (low number fitting...
A quasi-realistic aging test of NCA/graphite lithium-ion 18650 cylindrical cells is performed during a long-term low c-rate cycling and using new protocol for testing studying the aging. This to emulate characteristic charge/discharge profile off-grid PV-battery systems. The were partially cycled at four different cut-off voltages two state charge ranges (ΔSOC) 1000 700 cycles over 24 months. Differential voltage analysis shows that combination loss active material (LAM) lithium inventory...
An important step toward safer and more reliable lithium-ion battery systems is the improvement of methods for detection characterization degradation. In this work, we develop track aging indicators over life 18650-format batteries with a blended NMC532-LMO positive electrode graphite negative electrode. Cells are cycled until reaching 80% their original capacity under combinations four cycling conditions: ambient sub-ambient temperatures (29 °C 10 °C) fast mild rates (2.7 1.0C). Loss...
A porous electrode model, incorporating particle stress effects, is developed for the kinetic processes in positive Li(Ni1/3Mn1/3Co1/3)O2 or NMC111 electrode. The model used to analyze experimental data from galvanostatic intermittent titration technique (GITT) during charging at beginning of life. equilibrium potential accounts influence mechanical particles. While standard Newman-based proves unable capture dynamic performance NMC111, extended with allows good fits GITT responses NMC half...
Operating commercial LiNixCoyMn1–x –yO2(NMCs)/ graphite cells at a higher voltage cut-off would deliver energy density. This protocol has been broadly investigated in the literature, and connected with occurrence of rapid severe degradation. In particular, these studies point to de-coupling between capacity fade (mostly located on graphite) impedance rise NMC). However, present work we unveil non-negligible contribution NMC111 total fade, not reported other studies. unexpected feature is...
An important step toward safer and more reliable lithium-ion battery systems is the development of better methods for detection characterization degradation. For a method to be suitable online application (e.g., onboard an electric vehicle), it must simple, explanatory, non-invasive. In this work, we develop track aging indicators over life 18650-format batteries with blended NMC532-LMO positive electrode graphite negative electrode. Cells are cycled until reaching 80 % their original...
LiNi1/3Mn1/3Co1/3O2 (NMC111) is a state-of-the-art, commercially established positive electrode for Li-ion batteries. Identifying its performance limitations would support the development of better-performing batteries, as well design novel materials, such Ni-rich LiNixMnyCo1−x−yO2. These can be identified through electrochemical characterization, and several techniques are available purpose. However, they rarely considered in framework same study, making it difficult to understand which...
The aging of lithium ion batteries in off-grid photovoltaic (PV) energy systems is evaluated. Off-grid PV can improve their reliability and efficiency by storing the excess produced during sunny days using it when no other source available. Due to its high density, efficiency, constantly drop prices, are most suitable option be integrated system as storage [1]. Although impressive features, properties need studied further order achieve more efficient renewable [2]. One determinant property...
LiNi 1-x-y Mn x Co y O 2 cathodes (NMCs) are currently employed or evaluated for EVs, due to their high theoretical capacities and operating voltage [1]. In view of EVs’ stringent requirements in terms performance lifetime, NMCs have been tested several cycling protocols, simulating real-life applications, moving towards more energy-dense devices (high operation). such displayed different failure mechanisms, often consisting an overall increased resistance polarization. However, hindrances...
The high demand on specific capacity and occasionally harsh environment in electric vehicles has detrimental effects electrochemical, mechanical thermal properties of NMC/graphite Li-ion batteries. battery lifetime is reduced at voltage temperature, both terms fade impedance increase. At the graphite electrode, notion SEI layer formation growth leading to aging widely accepted. On other hand, NMC electrode needs be investigated more thoroughly. Xiong et al. [1] reported that cells could...