This paper proposes to analyze the degradation of lithium-ion batteries with the sequentially observed discharging profiles. A general state-space model is developed in which the observation model is used to simulate the discharging profile of each cycle, the corresponding simulation parameter vector is treated as the hidden state, and the state-transition model is used to track the evolution o...

The electronic and adsorption properties of graphene can be changed significantly through substitutional doping with nitrogen and nitrogen decoration of vacancies. Here ab initio density functional theory with a dispersion correction was used to investigate the stability, magnetic and adsorption properties of nine defects in graphene, including both nitrogen substitutional doping and nitrogen d...

Purpose: To conduct research on obtaining data, that ties lithium-ion battery voltage to perturbing effects of current flow, synthesize accumulator equivalent circuit, obtain algorithm for calculating element parameters circuit experimental data basis with subsequent check the model adequacy. Methods: Prognosing work doesn’t correspond real one at synthesis. Equivalent-circuit models cells play...

A composite made from hollow polyhedron copper oxide and graphene oxide was synthesized by sintering a Cu-based metal-organic framework (Cu-MOF) embedded with exfoliated graphene oxide. As a proof-of-concept application, the obtained Cu(ox)-rGO materials were used in a lithium-ion battery and a sodium-ion battery as anode materials. Overall, the Cu(ox)-rGO composite delivers excellent electroch...

Magnesium ion based batteries hold promise as a competitive alternative to conventional Lithium ion battery technology due to several key features. Theoretical volumetric capacity for magnesium metal anode is much higher compared to lithium metal. Furthermore, Mg is more readily available compared to Li, which can potentially lead to cost reduction and switching to Mg offers safety benefits ove...

To the average person, lithium-ion technology, at least until the last year or so, was represented by the black-box-like batteries in high-end consumer devices such as laptop computers. Mobile phone batteries use similar chemistry, although in that case the batteries are often lithium-polymer types that are frequently described as if they constitute an entirely different technology. The mystiqu...

The cyclic stress in lithium-ion battery electrodes induced by repeated charge and discharge cycles causes electrode degradation and fracture, resulting in reduced battery performance and lifetime. To investigate electrode mechanics as a function of electrochemical cycling, we utilize digital image correlation (DIC) to measure the strains that develop in lithium-ion battery electrodes during li...

Lithium-ion batteries have transformed our lives and are now found in everything from mobile phones to laptop computers electric cars. In lithium-ion batteries, an adequate electrolyte was developed using a winding process nearly related the progress of electrode chemistries. this technology, metal oxide is cathode, porous carbon anode. The electrochemical interaction anode material with lithiu...

The demand for portable devices such as cellular phones, PDAs, MP3 players and portable DVD players has grown significantly during the last few years. The portable devices usually include a variety of loads including LCD display, memories, mini microprocessor, Universal Series Bus (USB), and a hard disk drive. These loads require different operating voltages and load currents, and are powered b...