We studied the behaviour of Li/Li(4)Ti(5)O(12) cells by electrochemical impedance spectroscopy to gain insight into the changes at the electrode/electrolyte interfaces during extensive cycling. A simple equivalent-circuit model is able to describe the impedance of the complete battery as a function of both state-of-charge and state-of-degradation. The formation of the solid-electrolyte interfac...

All-solid-state Li-S batteries (use of solid electrolyte LiBH4) were prepared using cathodes a homogeneous mixture graphene oxide (GO) and reduced (rGO) with sulfur (S) lithium borohydride (LiBH4), their electrochemical performance was reported. The use LiBH4 its compatibility Li metal permits the utilization anode that improves vitality composite electrodes. GO-S rGO-S nanocomposites different...

Deposition of Li is a major safety concern existing in Li-ion secondary batteries. Here we perform the first in situ high spatial resolution measurement coupled with real-time quantitative electrochemistry to characterize SEI formation on gold using a standard battery electrolyte. We demonstrate that a dendritic SEI forms prior to Li deposition and that it remains on the surface after Li electr...

Sulfur is a promising cathode material with a high theoretical capacity of 1672 mAh g-1, however, the practical energy density of Li-S battery is far away from such promising due to its low active material utilization and low sulfur loading. Moreover, the challenges of the low electrical conductivity of sulfur and the high solubility of polysulfide intermediates still hinder its practical appli...

development of an eco-friendly, low cost and high energy density limnpo4 cathode material has attracted much attention due to its high operating voltage vs. li falling within the electrochemical stability window of conventional electrolyte solutions and offers more safety features due to the presence of a strong p-o covalent bond.synthesis of battery materials integrates the battery technology ...

The Li-ion battery is studied base on its equivalent circuit model. The discrete state space equation is established using Ah counting method and OCV method. The filtering algorithm is set up under the noisy environments according to the principle of extended Kalman filter and simulated. The simulation results showed that the integrated of three algorithms could very well remove the environment...

Current rechargeable batteries generally display limited cycle life and slow electrode kinetics and contain environmentally unfriendly components. Furthermore, their operation depends on the redox reactions of metal elements. We present an original battery system that depends on the redox of I(-)/I3 (-) couple in liquid cathode and the reversible enolization in polyimide anode, accompanied by L...

Hybrid, plug-in hybrid, and electric vehicles have enthusiastically embraced rechargeable Li-ion batteries as their primary/supplemental power source of choice. Because the state of charge (SoC) of a battery indicates available remaining energy, the battery management system of these vehicles must estimate the SoC accurately. To estimate the SoC of Li-ion batteries, we derive a normalized state...

Electrochemical impedance spectroscopy (EIS) is widely used in battery analysis as it simple to implement and non-destructive. However, the data provided a global representation of all electrochemical processes within cell much useful information ambiguous or inaccessible when using traditional techniques. This major challenge EIS analyse systems with complex chemistries, like lithium-sulfur (L...