A5055644931- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Supercapacitor Materials and Fabrication
- Semiconductor materials and interfaces
- Electron and X-Ray Spectroscopy Techniques
- Extraction and Separation Processes
- Silicon and Solar Cell Technologies
- Corrosion Behavior and Inhibition
- Reliability and Maintenance Optimization
- MXene and MAX Phase Materials
- Concrete Corrosion and Durability
- Graphite, nuclear technology, radiation studies
- Interconnection Networks and Systems
- Advanced X-ray Imaging Techniques
- Electrodeposition and Electroless Coatings
- Advanced Electron Microscopy Techniques and Applications
- Hybrid Renewable Energy Systems
- Engineering Applied Research
- Impact of Technology on Adolescents
- 2D Materials and Applications
- Risk and Safety Analysis
- Social Media in Health Education
- Infrastructure Maintenance and Monitoring
University of Warwick
2016-2025
The Faraday Institution
2022-2025
Bowling Green State University
2023
Coventry (United Kingdom)
2016-2018
Swansea University
2009-2012
Nexeon (United Kingdom)
2010
Commercial Li-ion batteries are typically cycled between 3.0 and 4.2 V. These voltages limits chosen based on the characteristics of cathode (e.g. lithium cobalt oxide) anode graphite). When alternative anode/cathode chemistries studied same cut-off often, mistakenly, used. Silicon (Si) anodes widely as a high capacity to graphite for Lithium-ion batteries. silicon-based paired with cathodes Lithium Nickel Cobalt Aluminium Oxide; NCA) cell suffers from rapid fade. The purpose this...
Li-ion cell designs, component integrity, and manufacturing processes all have critical influence on the safety of batteries. Any internal defective features that induce a short circuit, can trigger thermal runaway: cascade reactions, leading to device fire. As consumer manufacturers push aggressively for increased battery energy, instances field failure are increasingly reported. Notably, Samsung made press release in 2017 following total product recall their Galaxy Note 7 mobile phone,...
High-Ni cathode materials are prone to reactivity and instability upon exposure ambient levels of humidity. This has implications for the storage processing cathodes Li-ion batteries (LIBs), in order avoid any premature degradation material prior operation. NMC-811 were subjected differing degrees humidity, establish impact this would have on electrochemical performance. study used a combination physical, chemical methods investigate operational effects that moisture can battery accordingly....
Using lab-based operando X-ray and post-mortem techniques, researchers visualize the origins of electrochemical capacity fade under high-voltage conditions in pilot line single-crystalline LiNi${}_{0.8}$Mn${}_{0.1}$Co${}_{0.1}$O${}_{2}$-graphite cells.
The commercialization of silicon anodes requires polymer binders that are both mechanically robust and electrochemically stable in order to ensure they can accommodate the volume expansion experienced during cycling. In this study, we examine use low high molecular weight (MW) polyacrylic acids (PAAs), sodium polyacrylates (Na-PAAs), at different degrees partial neutralization, as a possible binder candidate for graphite anodes. High MW PAAs were found have capacity retentions 672 mAh g–1...
Abstract Lithium iron phosphate, LiFePO 4 (LFP) has demonstrated promising performance as a cathode material in lithium ion batteries (LIBs), by overcoming the rate issues from limited electronic conductivity. Nano-sized vanadium-doped LFP (V-LFP) was synthesized using continuous hydrothermal process supercritical water reagent. The atomic % of dopant determined particle shape. 5 at. gave mixed plate and rod-like morphology, showing optimal electrochemical good properties vs. Li. Specific...
Polymer binders are a key component for long-lasting silicon (Si)-based electrodes, and they should be mechanically robust electrochemically stable, with the ability to accommodate large volume expansion of Si during lithiation/delithiation process. The combination poly(acrylic acid) (PAA) poly(vinyl alcohol) (PVA) utilizes strong adhesion properties PAA mechanical robustness PVA, which can potentially overcome current technical challenges faced by traditional polyvinylidene-fluoride-based...
The microstructural degradation of a composite silicon electrode at different stages in its cycle life was investigated 3D using X-ray nano-computed tomography. A reconstructed volume 36 μm × 27 26 from the imaged pristine state and after 1, 10 100 cycles. Particle fracturing phase transformation observed within with increased cycling. In addition, distinct, lower attenuating clearly resolved, which can be associated surface film formation resulting electrolyte breakdown particle...
Silicon-Few Layer Graphene (Si-FLG) composite electrodes are investigated using a scalable electrode manufacturing method. A comprehensive study on the electrochemical performance and impedance response is measured spectroscopy. The demonstrates that incorporation of few-layer graphene (FLG) results in significant improvement terms cyclability, resistance diffusion properties. Additionally, responses occur during phase changes silicon elucidated through Staircase Potentio Electrochemical...
Maintaining the physical integrity of electrode microstructures in Li-ion batteries is critical to significantly extend their cycle life. This especially important for high-capacity anode materials such as silicon, whose operational volume expansion exerts huge internal stress within anode, resulting destruction and capacity fade. In this study, we demonstrate that by incorporating metal–organic frameworks (MOFs) with carboxylate organic linkers into Si-based anodes, a stable flexible pore...
Fast charging promotes Li dendrite formation and its growth on graphite anodes, which affects cell performance in Li-ion batteries (LIBs). This work reports the of a robust SEI layer by introducing KPF6 inorganic additive into electrolyte. An optimal concentration 0.001 M effectively inhibits dendrites at 2C rates, compared with commercial Electrolytes containing are shown here to deliver dual effects mitigate dendrites. A thin LiF-rich is formed graphite, blocks electron leakage pathways....
Silicon anodes require polymer binder systems that are both mechanically robust and electrochemically stable, to accommodate the dramatic volume expansion experienced during cycling operation. Herein, we report use of a poly(acrylic acid)-grafted styrene–butadiene rubber (PAA-g-SBR) with 80% partially neutralized Na-PAA as system for silicon-graphite anodes. The PAA-g-SBR graft copolymer was synthesized by grafting tert-butyl acrylate onto SBR treating intermediate H3PO4. PAA-g-SBR/Na-PAA...
Hybrid anode materials consisting of micro-sized silicon (Si) particles interconnected with few-layer graphene (FLG) nanoplatelets and sodium-neutralized poly(acrylic acid) as a binder were evaluated for Li-ion batteries. The hybrid film has demonstrated reversible discharge capacity ∼1800 mA h g-1 retention 97% after 200 cycles. superior electrochemical properties the anodes are attributed to durable, hierarchical conductive network formed between Si multi-scale carbon additives, enhanced...
Nanostructured materials have wide potential applicability as field emitters due to their high aspect ratio. We hydrothermally synthesized MoS2 nanoflowers on copper foil and characterized emission properties, by applying a tip-anode configuration in which tungsten tip with curvature radius down 30-100 nm has been used the anode measure local properties from small areas 1-100 µm2. demonstrate that can be competitive other well-established emitters. Indeed, we show stable current measured...
This study investigates the calendar ageing behaviour of NMC811//SiOx-graphite 21700 cylindrical cells (LGM50), which were held at varying states charge (SoC), for up to 70 weeks 4 different temperatures. Throughout study, capacity and internal resistance monitored, significant loss over time, with greater high SoC temperature, observed. A combination electrochemical testing post-mortem characterisation techniques point anode, more specifically, silicon-oxide particles, as driver fade...
Barley husks (BH), an agricultural by-product rich in carbon and silica, have been utilized as a sustainable precursor for synthesizing anode materials lithium-ion batteries (LIBs). A comparative analysis...
Al-surface doped Ni-rich single crystal material translates into better capacity retention in long-term cycling at higher UCV and temperature.
A series of LiMn1–x–yFexVyPO4 (LMFVP) nanomaterials have been synthesized using a pilot-scale continuous hydrothermal synthesis process (CHFS) and evaluated as high voltage cathodes in Li-ion batteries at production rate 0.25 kg h–1. The rapid screening approach has allowed the specific capacity Mn content olivines to be optimized, particularly discharge rates. Consistent gradual changes structure performance are observed across compositional region under investigation; doping Fe 20 at%...