A5043973474- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Extraction and Separation Processes
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Supercapacitor Materials and Fabrication
- Molten salt chemistry and electrochemical processes
- Metallurgical Processes and Thermodynamics
- Radioactive element chemistry and processing
- Titanium Alloys Microstructure and Properties
- Electric Vehicles and Infrastructure
- Advanced materials and composites
- Recycling and Waste Management Techniques
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced battery technologies research
- Nuclear and radioactivity studies
- Semiconductor materials and interfaces
- Intermetallics and Advanced Alloy Properties
- Semiconductor materials and devices
- Electron and X-Ray Spectroscopy Techniques
- Metal Extraction and Bioleaching
- Radiation Effects in Electronics
- Nuclear Engineering Thermal-Hydraulics
- Magnetic Field Sensors Techniques
Coventry (United Kingdom)
2015-2024
Coventry University
2019-2024
Indira Gandhi Agricultural University
2020
University of Warwick
2010-2019
Bhabha Atomic Research Centre
2004-2017
Imperial College London
2005-2008
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...
The charging rates of commercial high-energy Li-ion cells are limited by the manufacturer's specifications leading to lengthy times. However, these typically capable much faster charging, if one ensures that thermal and electrode-specific voltage profiles do not exceed safety limits. Unfortunately, precise in-situ measurements parameters have been achieved date without altering operation cells. Here we present a method assess maximum current for 18650s, using novel instrumentation methods...
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,...
Lithium-ion is increasingly the technology of choice for battery-powered systems. Current cell performance monitoring, which relies on measurements full voltage and sporadic surface temperature, does not provide a reliable information true internal battery state. Here, we address this issue by transforming off shelf cells into smart systems embedding flexible distributed sensors long-term in-situ operando thermodynamic data collection. Our approach, enables monitoring state, impact its...
Copper-doped Manganese Dioxide has been synthesised through a simple hydrothermal method at different doping levels. The materials have characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM) to determine composition, structure, morphology. All the Cu doped MnO2 are found be single phased. Their electrochemical properties as cathode for Zinc-ion batteries studied cyclic voltammetry (CV), galvano-static charge/discharge (GCD) impedance spectroscopy (EIS), using 3 M...
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...
This work demonstrates the development and evaluation of FBG optical fibre sensor technology for monitoring distributed in-situ in-operando temperature cylindrical 18650 lithium-ion cells. The influence sensing element on electrochemical system was evaluated using EIS, CT scanning cell cycling characterisation proven to be negligible. Furthermore, sensors were resistant strain imposed during instrumentation procedure harsh chemical environment inside Li-ion methodologies modification...
Identification of the state-of-health (SoH) Li-ion cells is a vital tool to protect operating battery packs against accelerated degradation and failure. This becoming increasingly important as energy power densities demanded by batteries economic costs increase. Here, ultrasonic time-of-flight analysis performed demonstrate technique for identification range defects SoH in cells. Analysis large, purpose-built across multiple length scales pouch The then demonstrated detect microscale defect...
The performance evaluation and optimisation of commercially available lithium-ion cells is typically based upon their full cell potential surface temperature measurements, despite these parameters not being fully representative the electrochemical processes taking place in core or at each electrode. Several methods were devised to obtain electrode-specific profiles cylindrical Li-ion cells. Optical fibres with Bragg Gratings found produce reliable data, while small mechanical profile allowed...
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...
Lithium plating in lithium-ion batteries (LIBs) is one of the main causes safety accidents electric vehicles (EVs). The study intelligent machine learning-based lithium detection and warning algorithms for LIBs great importance. Therefore, this paper proposes an early method based on random forest model. This can accurately detect during charging process LIBs, play role according to results. First, pulse experiments including normal tests, were completed validated using situ characterization...
Mo alloys were produced via the electrochemical deoxidation of precursors (formed by sintering and blended powders) in a molten electrolyte at 1173 K Fray–Farthing–Chen (FFC) Cambridge process. The reduction was characterized analyzing several partially reduced samples taken periodically through Fully metallic retrieved after 9 h reduction. This relatively short time relative to that documented pure attributed early formation conductive network. is known reduce its lower oxides sequentially...
Long cycle performance is a crucial requirement in energy storage devices. New formulations and/or improvement of "conventional" materials have been investigated order to achieve this target. Here we explore the novel type carbon nanospheres (CNSs) with three heteroatom co-doped (nitrogen, phosphorous and sulfur) high specific surface area as anode for lithium ion batteries. The CNSs were obtained from carbonization highly-crosslinked organo (phosphazene) (OPZs) 300 nm diameter. OPZs...