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Related Concept Videos

DC Battery01:21

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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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Energy Stored in a Capacitor: Problem Solving01:26

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In 1749, Benjamin Franklin coined the word battery for a series of capacitors connected to store energy. Capacitors store electric potential energy that can be released over a short time. This property means capacitors have a wide range of applications.
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When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
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Updated: Sep 13, 2025

Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization
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Self-Discharging Mitigated Quantum Battery.

Wan-Lu Song1, Ji-Ling Wang1, Bin Zhou1,2

  • 1Hubei University, Department of Physics, and Key Laboratory of Intelligent Sensing System and Security (Ministry of Education), Wuhan 430062, China.

Physical Review Letters
|July 31, 2025
PubMed
Summary
This summary is machine-generated.

Quantum batteries (QBs) offer faster charging but suffer from energy loss due to decoherence. This study proposes a nitrogen-vacancy center QB that enhances robustness against self-discharging by optimizing quantum properties.

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Area of Science:

  • Quantum thermodynamics
  • Quantum information science
  • Solid-state physics

Background:

  • Quantum batteries (QBs) leverage quantum systems for energy storage, promising enhanced power and work extraction.
  • Decoherence leads to self-discharging in QBs, limiting their practical application.
  • Nitrogen-vacancy (NV) centers in diamond are promising candidates for QB implementation.

Purpose of the Study:

  • To propose a QB scheme using NV centers in diamond.
  • To investigate methods for mitigating self-discharging in QBs.
  • To enhance the robustness and efficiency of quantum batteries.

Main Methods:

  • Utilizing the electronic spin of NV centers in diamond as the quantum battery.
  • Analyzing the decay rates of coherent and incoherent ergotropy.
  • Leveraging the hyperfine interaction between the electron and the ^{14}N nucleus for coherent optimization.

Main Results:

  • Coherent ergotropy decays slower than incoherent ergotropy, indicating a pathway to enhanced robustness.
  • A mechanism was revealed to improve the ratio of coherent to total ergotropy, mitigating self-discharging.
  • The proposed scheme simultaneously reduces self-discharging and optimizes extractable work.

Conclusions:

  • The NV-center-based QB scheme effectively mitigates self-discharging by enhancing coherent ergotropy.
  • Coherent control over the ergotropy ratio is key to robust quantum battery performance.
  • This research advances the practical realization of efficient quantum batteries.